|
RE: Ziroli Dauntless -Crew animation
[quote]ORIGINAL: Prekin Your Dauntless is very nice scale warbird! The flying with it have to be very exhilarating. I´ve just bought ESM Dauntless. I would like to use some gas engine about 25 cc. Other plans are scale TYS cockpit and Savex radial engine, here are the pictures. [/quote] Should look good with that dummy engine up front. I like the MVVS engines from your part of the world (branded Evolutions in some other countries). Excellent engineering quality or how about one of the new smaller OS gas engines?
Posted on: 5/15/2013 2:31 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11512523
RE: Ziroli Dauntless -Crew animation
[size=2]Yes, they work fine now, just needed a bit more clearance for the wheels. They worked well on the ground but in the air the slipstream pushed them back a few thou enough to rub against the well sides. The model is a bit tight for space in this area and the smallish Robart retract cylinders are only just powerful enough. I might convert to electric if they worsen or look at Sierra. [/size].
Posted on: 5/15/2013 9:25 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11512282
RE: Ziroli Dauntless -Crew animation
Thanks for your comments guys. I think this old iphone video on a gloomy dark day has the Dauntless amongst other aircraft before I animated the crew. I had problems with the retracts that day jamming on the wheel wells so they stayed down. http://www.youtube.com/watch?v=1Aqdksxku-c
Posted on: 5/15/2013 7:01 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11512144
RE: Another A-10
Good Luck Al (as if you really need it!). Even the weather is looking good for you this weekend.
Posted on: 7/20/2012 3:20 PM by Author "Edhamp"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11162844
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Thanks Tom, I continue to be impressed with the power delivery, easily matching if not exceeding my DA100 running a 28x10. I went for the 26x12 3 blade since that is the only 3 blade reccomendation in the manual for the 160. It works extremely well, but this engine has plenty to give and should be able to handle a decent 26x14 3blade and might be even better.
Posted on: 7/20/2012 3:07 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11162830
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
If at first you don’t succeed etc. etc. Changes have been made to equipment layout as follows (hope anyone following this reads this post first as I cannot edit earlier posts) Despite the large lump up front, my advice with hindsight, a mantra which, as we all know, works for most warbirds is “put everything up front and keep the tail light”. Twin powerbox batteries from forward wing compartment to rear of firewall. Engine moved forward ¼” making standoff distance from firewall on the “ARF” version 60mm. Air tanks moved to front equipment tray just aft of firewall . Tailwheel steering servo also moved to fuselage removeable front equipment/fuel tank tray. Powerbox and retract valves moved to forward wing compartment. A few more ounces shaved from the tailwheel and rear area where possible The net result is approx 1.5 lbs transferred from the centre wing section to the fuselage in front of CG. Rebalancing the a/c fully loaded took 2lbs of lead shot in the cowl ring, which is approx 1.5lbs less than before making total weight 48.5±0.5lbs dry. If you left out all scale stuff, cockpit etc, no powerbox/RRS etc, single elevator servo and remembering my dash 4 modifications will have added some weight, then it may be possible tocome under the 44lb mark but do not bank on it. You are going to need a lot of weight up front whatever you do, a lighter engine does not help.
Posted on: 7/16/2012 12:42 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11119172
RE: 1/5 scale royal F4U1A
I built and flew the Royal Corsair converted to F2g racer version with bubble canopy. It flew extremely well on a zenoah 62 . Needed plenty of weight up front to balance so maybe relocate some of the servos shown at rear on plan. Also would upgrade any fittings to more heavy duty modern linkages, particularly on aileron. I did not bother with flaps (no provison for it if I remember) but it still landed slow and was a pleasure to fly. I lost it due to aileron jamming in down position following a broken hinge link hence my comment earlier. Plenty of wing area so should be good up to 40lbs and I would glass . The aluminium spun cowl is a work of art. The method of wing attachement is a bit out of date and I never liked it or how it looked but it did the job. . cheers Ed.
Posted on: 7/16/2012 12:40 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11156532
RE: P-40 Exhaust stacks
Do not know if Yellow aircraft sell them as spares for their P-40, but if so they do look right.
Posted on: 7/6/2012 1:10 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11145575
RE: Another A-10
Al, I just love your fantasy scale schemes, hope to see this on the show circuit soon, your displays with the previous A-10 were just awesome and this one has to be the best looking yet and I cannot see it upsetting the scale police too much. Mind you I did notice you were several rivets short on that UC door...........................
Posted on: 7/6/2012 4:27 AM by Author "Edhamp"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11144983
RE: Evolution 7 cylinder 260cc radial engine - Operation and maintenance
EVO 160 ENGINE TEST & SOUND: This thread has gone a bit quiet, so here is a short vid of my EVO 160 on its test stand, for the CARF Corsair as previous post. http://youtu.be/aFrovdQmYW4 From my experience so far, the EVO160 is a very impressive engine, despite a couple of minor niggles already gone into on my Corsair thread. This engine starts really easily from cold after choking and hot, hand flipping only required, the manual choke worked fine . I deliberately set the tank lower than the carb by approx 6 inches with a longer than will be used fuel feed pipe (large diameter tygon, not the narrow stuff) to see if there would be any problems in drawing fuel into the carb without a fuel pump. There was none and, the inaccessible primer bulb fitted to the walbro was not required. I do not think you will need an auxiliary fuel pump with this engine. The conventional pulsed fuel diaphragm set up works well. The engine seems to sip fuel, a 32oz tank is more than enough. Throttle response was fantastic straight out the box (the engine seems to have been properly set up at the factory). Full throttle (only a few brief seconds at this stage of running in!!) FRIGHTENING, enought to lift the two sandbags and a large bag of heavy compost weighing down the test stand. The 260 must be awesome! This motor will have plenty of power for 50lb scale model. I ran it with a 26x12N 3 blade Menzlik. Without any tuning at this stage and using running in oil mix, 5500rpm was seen and will idle fine as slow as 1000. The exhaust ring is pretty effective and quiet at lower trottle settings and with this prop No problems with any miss-firing cylinders or cold spots at any time and glad to say nothing came loose like exhaust mounting nuts. The engine sound to me is more V12 than big block V8, in this respect, I think a large 5 cylinder MOKI260 has the edge with a more throaty deeper scale sound, whereas the EVO 160 sounds better than the Moki150 which, in my view, can sometimes sound a bit tame in an enclosed cowl. On the other hand there is a fair bit of mechanical "clatter" with the Evo160 which may reduce with the cowl on and only noticeable close up to the engine. The sound gets better further away as the lower frequencies come through. Overall the easy starting, good pick -up, slow idle, smooth vibration free running, and sheer power are all good so far. Very impressed. I already have another dream project lined up for this engine - it fits perfectly in the cowl of a 1/4 scale Curtiss Goshawk from some old Dick Barron plans that I have .......................................................
Posted on: 7/6/2012 1:36 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11144270
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Cheers Gary. So far so good. I hope to get the maiden under my belt in the next couple of months but that depends how long it takes to get a permit to fly, the great British wx and my nerves . Ed
Posted on: 7/4/2012 12:24 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11142891
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
ENGINE TEST & SOUND: Engine now running-in on test stand. 30:1 mix using mineral (will use Bel-ray 40/1 later) and procedure as per manual. Very pleased with it for the following reasons. Started really easy after choking, hand flipped only, manual choke worked fine (I deliberately set the tank lower than the carb with a longer than will be used fuel feed pipe (large diameter tygon, not the narrow stuff) to see if there would be any problems in drawing fuel into the carb without a fuel pump. There was none and, as hoped and mentioned earlier, the inaccessible primer bulb fitted to the walbro was not required. I do not think you will need an auxiliary fuel pump with this engine. The conventional pulsed fuel diaphragm set up works well. Throttle response etc fantastic straight out the box (the engine seems to have been properly set up at the factory). Full throttle (only a few brief seconds at this stage of running in!!) FRIGHTENING, enought to lift the two sandbags and a large bag of heavy compost weighing down the stand . This motor will have plenty of power I am certain now for a 50lb+ model. Prop used was 26x12N 3 blade Menzlik. The engine was much quieter than I expected with this prop at the lower throttle settings. The exhaust ring is pretty effective. Be interesting to see what it sounds like without . Idle was almost at a crawl given not yet run in. http://youtu.be/aFrovdQmYW4 Judge for yourself. The engine sound to me is more V12 than big block V8 (and I used to own a 65 'vette so I should know), in this respect, I think a large 5 cylinder MOKI260 has the edge with a more throaty deeper scale sound, whereas the EVO sounds better than the smaller Moki150 which, in my view, can sometimes sound a bit tame in an enclosed cowl. On the other hand there is a lot of mechanical "clatter" with the Evo160 which my reduce with the cowl on. Overall the easy starting, good pick -up, slow idle, smooth vibration free running, and sheer power are all good so far. Very impressed. Will run through a few more tankfulls, check and put back in the aircraft for some ground runs.
Posted on: 7/4/2012 11:58 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11142726
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
[quote]ORIGINAL: ram3500-RCU Very nice looking model Ed. I understand your desire to get the weight down, but really, I think you will be fine. Big Hog weighed about 70lbs, and flew like it weighed 30 with the Moki 250. I really think, even at 50lbs, you Corsair will have outstanding performance. Having said that, I would fill the cowl ring with ballast to get it as far forward as possible, and move the batteries to the firewall. I also move the servo for the tail steering as far forward as possible, not in the CARF manual location. Water over the dam know, but being conservative with adhesives when installing the wood parts in the tail helps. I tend to over glue these parts. I think the CARF projected numbers are hardly realistic for the average builder. An unadulterated ARF builder may unwittingly achieve some close weights, but I doubt the plane would last. Also, the folding wing adds more like 10-12lbs, not 6lbs. We can't seem to get the weight under 60lbs on one of these. Looking forward to that maiden. [/quote] Thanks for the encouragement and ideas, good one to move tail steering servo, thats not to difficult and also other equipment moves. And yes I find that Hysol gun just a little too handy to beef things up here and there! In fact I was just viewing the videos on Utube of BiG Hog to see what you have all acheived and convince myself that these things really do fly!. Really superb job all round . Unfortunately in the UK exceeding 44lbs (20kg dry) means getting exemption certificate paperwork in order to fly (why UK has a lower limit than most other countriesin this regard is beyond me).
Posted on: 6/21/2012 3:25 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11104986
RE: Composit ARF corsair and Evolution/Seidel 260cc Radial
[quote]ORIGINAL: DiscoWings Hi, Does anyone know if the EVOLUTION 260 will work on the CARF Corsair or is the engine to big? [/quote] If you have seen my CARF Corsair thread with the EVO160, this only just fits with not much clearance for the valve gear, never mind the 260 .
Posted on: 6/15/2012 1:10 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11119441
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
The engine will be removed and test run on a stand so I can get some operating experience and a feel for it first and see if it in fact delivers. I am not using a fuel pump, the large bore fuel line from the tank is short and the carb diaphragm seems to make use of conventional pulsing from two of the fuel inlet manifolds using a Y connector. Be interesting to see how that works and and if the primer bulb fitted to the carb can be treated as redundant and superceeded by the choke flap. Apart from reporting back on the maiden, that just about completes this project. What would I not do next time? Modifying the canopy to flat screen - choose a scheme with the earlier canopy, much easier and less risk of screwing up your existing canopy! I was quite pleased with the look of the cowl and how the other modfications turned out. On my wish list are electric retracts and Big Hog's machine gun sound . Ed
Posted on: 6/15/2012 9:06 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11119202
RE: Yellow P-40 flight characteristics
A lot depends on weight and what engine you have. Mine weighed 27lbs and has DA50 with 22x8 prop. Lots of power and flies 1/2 throttle or less. All throws and CG as per manual. Wing is in two halves with wing tube joiner for ease of transport. Main points are rudder can be sensitive on takeoff with narrow track U/C so watch your movements and add some expo. Make sure tail comes up before trying to lift off and do not climb too steep. Once in the air tracks really well and positive. If you have flown turbines you should not find this any harder to fly. Flaps help landing a lot (I found at least 30 degrees and 40 if you can get it) but do not slow down too much, fly slow and it will drop faster than you would like. On mine gear and flaps position affected trim so be prepared for this until you establish if you need to add mixing. In general mine perfomed and flew better than I expected and hopefully you will find the same, best of luck with maiden. A great model with good access to the engine, very sturdy construction and strong retarcts, no need for any weight in the nose if you place everything right for balance.
Posted on: 6/5/2012 7:42 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11106035
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Some pics of the cockpit detail. Awaiting an Axel pilot. Not sure how he is going to fly an aeroplane with no rudder pedals Next step will be bench running of the engine. As a radial newbie, my experiences would be be a good test case for Horizon since the EVO160 will attract many other newcomers to this type of engine (but do not expect a fast response from their technical department, still waiting for a reply to a query sent over two weeks ago!).
Posted on: 6/3/2012 1:34 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11104807
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Back to the matter in hand, the “Baby” was weighed and balance checked fully loaded minus pilot and the planned alloy prop hub so substituted a steel spacer washer of similar weight). It is not good news! Total weight: Fuselage/Tail 25 ±0.5 lbs Wing assembly (includes batteries, powerbox, retract etc) 21±0.5lbs Total Weight before checking balance 46lbs. I balanced the model by both suspending it at the balance point gear up (see pic) as well as using my own “balance stands” using parts robbed from a Great Planes balancer. The balance point, as used by others was 61/2 to 6 5/8” from the wing leading edge at the fuselage. This corresponds to the recommended position in the manual which is ½: in front of the main spar as viewed from the top (there is a panel line on the top surface that runs parallel to the front edge of the spar which is handy reference). In order to get the model to balance I needed 3.5lb (placed on top of the cowl) of metal. That would make a total flying weight of 49-50lbs. At the start of this forum I was hoping for 40-45lbs. I wish. So is it time for this baby to go on a diet? I have no doubt she will fly at this weight and hopefully performance will be better than just acceptable, if scale like. Carf Website quotes 40-46lbs dry (I guess the lower weight for the fixed wing and the upper weight for the folding wing and/or quoted engine sizes of 80-150cc 2-stroke up to 4stroke radial). Well it may be possible to achieve these optimistic weights with the minimum of equipment in a sport model with no scale details whatsoever apart from paint, but I cannot see it given the weight needed in the nose to balance. CARF must get through a lot of rose tinted glasses! Carf states that this model purposefully designed around a MOKI engine that would exactly balance this model, or words to that effect. Considering just about every build that I have seen on these forums and elsewhere, most people seems to need around 4-5lbs weight up front to balance their MOKI250/215 models when scale details like cockpit are added, it would be interesting to know if there is anyone out there who has not needed to add any weight in the nose for balance and how they managed it (no cockpit, opening canopy??). The Evo160 fitted here (and I am making an educated guess based on published specs which are not to clear about if things like ignition unit, exhaust etc are included in the total weight) is approx 1-1.5lb lighter overall than MOKI250 and about the same as MOKI150. So with only 3.5lbs to balance you could argue this is a good result, where some people have used more with a heavier engine. Having said that I have no arrester hook, retract wheel wells and UC doors are stock, and elevator servos moved forward (see earlier posts). So what to do next? Any suggestions welcome! Looking at saving a lb or two in nose weight, I could: 1. Redistribute weight by moving the bulk of equipment, radio batteries, powerbox, retract valve etc from the wing centre section, where these are just dead weight, to as far forward as I can get in the nose where there is plenty of room. With hindsight I should have done this anyway, even if the wing offered a convenient place to mount an equipment tray. 2. The engine can easily be moved forward another ¼-3/8” ,which should help. 3. Undergo a through look at all components to see if any weight can be shaved off (I do not want to the additional expense of electric conversion for the retracts, at least not until I have some hours under my belt. I have lightened things, wood etc as I have gone along so this exercise unlikely to achieve a great deal). Things which are not an option include: 1. Not moving the rudder servo from the tail as it would mean using cables and less positive control on such a large rudder. 2. Removing fun things like gun lights, opening canopy and cockpit (which alltogether add no more than about 1.5lbs).
Posted on: 6/3/2012 1:00 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11104790
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Some pictures of the (almost) finished model yet to see fresh air. The flash on some pictures makes the gloss sea blue seem "Bluer" than it is.
Posted on: 6/3/2012 10:23 AM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11104797
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Sounds like my wife. Remember, she does not have to like aeroplanes, just tolerate them (and the money we spend on them) and on that score I am sure that like myself, you can have no complaints! [quote]ORIGINAL: ram3500-RCU [quote]ORIGINAL: vasek The are 2 possibilities: 1) you're the father of the bride; you could ''skimp'' it on the food... just provide more booze & no one will complain ;) 2) you're getting married yourself; ... get used to it! LOL [/quote] I'm the father of the bride. My youngest and #8 of my kids. My little baby. We had 4 boys and 4 girls. 2nd girl to get married. We will have been married 39 years in August. She has not liked airplanes all 39 years.[:o] [/quote]
Posted on: 5/27/2012 12:23 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11096389
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Engine Installation continued: Some pictures of the final EVO 160 installation. The four engine mounting bolts are made up of M6 threaded rod which are bolted to the stock firewall from both sides using large repair washers to spread the load, as well passing through the firewall extension box (through a captive T-nut). That way, part of the engine load is taken all the way back to the main firewall as well as spreading some of it through the firewall entension box. Just bolting a heavy engine like this one to the firewall extension would be asking for trouble (the mounting ring appears poorly seated in the pictures only because the engine is loosely bolted on). A convenient location for the throttle servo was found to present itself on one of the eight faces of the octagonal firewall entension giving a short direct link. Its a long way from the exhaust but I fitted a heat shield just in case. As you can see the EVO160 exhaust ring only needs a short extension to finish once the outlet was altered to face rearwards as described earlier. The choke linkage arm has had a paxolin horn fitted so that it can be conveniently actuated using a pushrod that passes through the lower cowl mounting (which helps to keep the choke cover centred and hence well seated when closed) and exits discreetly between the lower cowl and fuselage. The engine pretty much fills the front of the cowl. As things stand the cowl can be removed and replaced easily. I will look to adding some baffles between the tops of the cylinders which cannot do any harm allthough I have a feeling this may not be essential.
Posted on: 5/26/2012 4:10 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11095531
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
I am sure you will get your hands on one soon .
Posted on: 5/26/2012 3:49 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11095601
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Thanks for your thoughts on the cooling baffles, as you say this engines appears to run coooler so it may be a token gesture!. I am planning a 26x12N 3 blade Menzlik . Otherwise if that does not work then from info posted on Steve's thread on the EVO260 by those running the 160, I will try 28x12-14 2 blader.
Posted on: 5/26/2012 3:02 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11095571
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Engine Installation The engine has arrived and its time to see what is required to modify to fit the carf Corsair. The engine only just fits in the cowl, which is approx 12” ID( with about ¼ inch to spare at the top of the valves (not sure it would fit an 11” cowl, Horizon spec gives engine diameter as 11” or 28cm which seems a bit optimistic to me so bear this in mind if planning on using this engine with your warbird! The single exhaust outlet on the lightweight aluminium collector points vertically downwards and there is no way the one piece cowl can be fitted from the front without shortening the outlet (would not look good in any case exiting out the bottom of the cowl). I cut the outlet and reshaped and refitted it at 10-15 degrees from the horizontal where it lines up almost directly with the one of the lower exhaust cut outs and a simple extension pipe is all that will be needed (see photo before and after). There is plenty of clearance for the exhaust ring.
Posted on: 5/26/2012 2:24 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11089136
RE: CARF F4U-1 Corsair build thread
You probably seen this, I thought about this scheme for my F4U-4 bash, its a bit different but metallic blue is a bit garish!
Posted on: 5/23/2012 4:21 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11092235
RE: CARF F4U-1 Corsair build thread
[quote]ORIGINAL: ram3500-RCU How about a CARF bashed into this?[:D] [/quote] Already done , please see corsair review on CARF website. http://www.carf-models.com/public_carf/pages/products/700000/079000/corsair_fmt.pdf Cannot read german myself but pictures tell a good story. I did something similar with my Royal Corsair a few years back. Flew great and great colour scheme in the air.
Posted on: 5/23/2012 3:38 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11092187
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Thanks Gary. Of course I have been totally inspired by your fantastic build thread which has greatly contributed to the building of this Corsair. Having trial fittted the EVO 160 engine (which weighs 10.6 lb), the total weight with just about everything on board is pushing 44lbs which was my upper limit. I have not checked the balance point yet and am hoping not to need any weight up front with the engine mounted well forward in a slightly longer cowl plus the elevator servos fitted midship. If it works out nose heavy (unlikely) I have scope to move the servos and batteries rearwards. Its hard to see where I can shed some weight without compromising safety apart from getting rid of the fun stuff like opening canopy, cockpit detail and extras like nav and gun lights (probably adds no more than about 1.5lb).Electric retracts could work out lighter overall. I have done my best to reduce weight, especially in the tail (even drilled a few holes in Darrel's excellent tail gear where it cannot be seen and where the extra metal will not be missed) and static display hook only planned. I will report on the final weight and balance when configured ready to fly. cheers
Posted on: 5/22/2012 3:30 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11090074
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
It good to get your view and experiences of the performance with the 250 . When I first read the manual which advised take-off at half throttle and not to exceed 125mph I pretty much decided there and then to take a risk with the 160 in the plug in wings version. I agree that the 150/160 should both be good at this weight and I am a lot happier now after reading your comments! I had to shorten the damper on the tailwheel to get it to retract but even now it sticks out too much. Mechanically speaking the elevator set up I described earlier worked out better than I hoped and is very strong and positive with the dual carbon push rods supported internally through the tailwheel former . Not cutting the elevator connecting rod as the manual suggests also keeps things rigid and slop free with this set-up. Worth considering if using dual servos but, I would not bother if you are planning on just one servo for the elevator as this will be less positive with a single long push-rod. I have left the rudder servo as per CARF intended. I considered combining rudder with the tailwheel steering to save more weight using cables but decided that would probably end up giving trouble in the long run and it is nice to have independent tailwheel and rudder steering. I,m too am going with a 30oz fuel tank and also no fuel pump (bench running will tell if the carb pulse system as fitted to the EVO160 can be relied on). To keep lines as short as possible (EVO160 manual states no more than 8") , the tank is mounted against the firewall, cannot see that as a problem as regards CG moving forward with full tanks which I probably will not even notice in practice. Do please let me know if you come up with any more ideas to save weight because if mine gets much heavier I am going to need a UK CAA exemption certificate cheers Ed
Posted on: 5/22/2012 3:28 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11090740
RE: Composite ARF CARF Corsair F4U-1 to F4U-4 conversion kit bash
Thanks Vasek, I'll describe the painting and final finishing soon when it is complete and I can take some pictures outside of the assembled model, but basically the various fastners and rivets (in fact not rivets but mostly spot welds) are made using brass tube of various sizes over the existing factory detail to wear the top coat of paint away (I used Modelmaster enamels) to expose the factory silver finish underneath. The panel lines are lightly scribed, then followed by some subtle weathering and shading using an airbrush followed by Klass Cote gloss, This is too glossy so when dry was cut back with very fine steel wool and rubbing compound then re polished to give a painted metal look with variations in surface gloss and finish so does not look too much like a painted model and also highlights the raised panels, hatches etc and weathering of paint colour. The trick with the panel lines etc is not to overdo it but most pictures of the dark sea blue corsairs show this detail to a lesser or greater extent where the metal shows through with panels being removed and replaced in service. I painted the large light grey exhaust stains as per the earlier photos but decided that they spoilt the overall look, even if more reaslistic so you can consider the version as one that has just been been cleaned so you will not see these on the final model, just some blacking and burnt paint effect near the exhausts! Ed
Posted on: 5/21/2012 2:30 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11089268
RE: Evolution 7 cylinder 260cc radial engine - Operation and maintenance
Thank you Tom, very useful info and certainly impressive figures for the 160. I have another thread here where I am fitting the EVO160 into the CARF Corsair. http://www.rcuniverse.com/forum/m_11036370/anchors_11089136/mpage_2/key_/anchor/tm.htm#11089136 cheers
Posted on: 5/21/2012 1:38 PM by Author "Edhamp"
in the forum "RC Warbirds and Warplanes"
http://www.rcuniverse.com/forum/fb.asp?m=11061681
| 
