RE: 150 meter rule.
I have used Google Earth for the same thing as it has a built in ruler. I have been at this field out at the center marker while an F3A pilot flew and gave a raised arm to the caller whenever he flew beyond me. Very interesting experience.
Posted on: 9/12/2012 8:08 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11226817

RE: Pipe for DLE 35 RA
I think there are very few actually in the hands of customers and perhaps none running on a pipe yet. I asked a US importer for the exhaust port dimensions and got no response. A simple sketch like the one below is all that is needed. Until the exhaust port is known it's tough to come up with a header. Most likely [link=https://www.krumscheid-metallwaren.de/neu/showarticlelist.php?action=list&lang=EN&cat=SBS_S]KS[/link] has a header part available that is a close enough fit to work with little or no modification. You just have to sort through their many variations.
Posted on: 8/14/2012 4:49 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11193618

RE: Home made header supplies???
[quote]ORIGINAL: skip1320 You have Part number for stub/header you modified,Thanks [/quote] The KS website is a bit confusing since there are often two part numbers listed on the same page for the same item. The number listed first seems to be what they really go by. I picked this [link=https://www.krumscheid-metallwaren.de/neu/showarticledetails.php?lang=EN&anr=1342]1342[/link] stub since I wanted to use the smallest 20mm tubing. KS lists [link=https://www.krumscheid-metallwaren.de/neu/showarticledetails.php?lang=EN&anr=1461]1461[/link] as fitting the DLE 20 but this looks totally wrong. For use with 22mm tubing [link=https://www.krumscheid-metallwaren.de/neu/showarticledetails.php?lang=EN&anr=1422]1422[/link] and [link=https://www.krumscheid-metallwaren.de/neu/showarticledetails.php?lang=EN&anr=1427]1427[/link] look like they may fit with less modification, just slot the bolt holes a bit.
Posted on: 8/14/2012 3:01 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11192683

RE: Home made header supplies???
I've bought unadvertised KS parts from DA but if they don't respond then that's a big roadblock. Aircraft International also stocks some stuff but probably just to support the engines they sell. Probably the same for DA. The don't list 20mm sizes for example. http://www.aircraftinternational.com/Products/Exhaust/KSCustomHeaderParts.aspx I just got this DLE 20 stuff from KS in Germany along with a bunch of other stuff. It took about 2-3 weeks to the US. Their web store never gives any kind of order confirmation or any other kind of communication like shipping cost but it does work. I was slightly surprised by the final cost being a little more than what I had thought it would be. KS covers a wide variety of engines so even if yours is not specifically covered you can usually find an exhaust stub that is close enough to your engine to work with minor dremel work. You just have to look through the dimensions they list for each one. The DLE exhaust stub in the picture is not made for a DLE 20. I wanted to use 20mm tubing so I modified a stub made for a different engine. The price of silver is sky high right now and that has raised the cost of the silver solder.
Posted on: 8/12/2012 10:20 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11191178

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: RiverLarry + 1       buy cheep by often !!! The     IBEC  are great !!!!      a 2000 ma   NIMH   about 3   15 minn.  flights !!!  and could make  4       kill suitch and a step down for  IING      5.4 V     [/quote] Cheap and inexpensive don't mean the same thing. Those that don't understand the difference are an easy mark.
Posted on: 8/11/2012 6:35 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11189824

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: microdon2 Aerobar \ Sandy Jain - Sounds like using that diode is a good option if you already have the extra battery and swith \ charging jacks. If not, then the Ibec seems like a good - somewhat cheaper - and lighter alternative to a dedicated ignition battery. Agreed? [/quote] Depending on your choices and sources of switches and batteries the price may start be be comparable although I don't see it being cheaper. I make my own packs to get the type and number of wires/connectors I want. It also happens to be cheaper than a commerically finished pack. The price of the Ultra IBEC has dropped quite a bit since I last looked at it. If the Ultra IBEC has features that you value highly then the price may be irrelevant. Even though I look for great values I am far from penny wise and pound foolish. I have spent lavishly on RC stuff when I thought it was worth it. Having been frugal were it makes sense makes the occasional lavish purchase much easier.
Posted on: 8/11/2012 11:08 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11189419

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: mach2 .....I also like the LED showing power to the ignition. There are also 4 different voltage level options. How does your home made unit have an optikill? Thats a pretty cool thing....... [/quote] All of those are attractive features that the diode solution does not have. Like I said, nothing wrong with that choice. I'm just pointing out another choice for those like me that find very cheap very attractive.
Posted on: 8/9/2012 11:17 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11187827

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: mach2 <a target=''_blank'' href=''http://www.tech-aero.net/ultra-ibec''>www.tech-aero.net/ultra-ibec [/quote] From all reports this is a great product backed up with great service. On the other hand, for the $45 purchase price you could instead get about 1400 of [link=http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4007/?qs=ZbYWOjW8mGpgsSEErKxdmfUH0OoFY7oB]these[/link]. That's enough to equip 700 planes with a ignition voltage reducer suitable for LIFE type batteries. If you only need enough for a few planes then your local electronics shop can set you up for a buck or two. Using these with a separate ignition battery will increase your plane's weight by a few ounces over the Ultra IBEC. If that's a problem then there are usually other, cheaper ways to save that much weight. Nothing wrong with either choice, just letting you know there are choices.
Posted on: 8/9/2012 12:21 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11186577

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: spitfire66 .....I want to go to to a LIFE 6.6v battery....... [/quote] http://www.rcuniverse.com/forum/fb.asp?m=10165225 or the same thing pre-made for $7.99 http://www.shop.kavarootusa.com/product.sc?productId=32&categoryId=10
Posted on: 8/8/2012 4:38 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11186140

RE: D-7 Champs in Bakersfield
[quote]ORIGINAL: Passport1 ......focus all of my time and effort into the Bakersfield Spring Invitational Bash..... [/quote] Invitational?
Posted on: 8/5/2012 9:29 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11182432

RE: High rpm 20cc motors
[quote]ORIGINAL: w8ye The DLE 20 has big ports and also a boost port but I consider the crank pin to be a weak link in those. You start running it at 9500 or 10000 for very long  and the pin will come off the counterweight. [/quote] The crankpin/bearing situation is unfortunate because in my limited experience with the DLE it seems to have a lot of potential at higher rpm with a pipe.
Posted on: 8/4/2012 11:30 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11181305

RE: Where are the 40cc Gas Engines???
[quote]ORIGINAL: MTK I also wish that OS (and others hopefully) would bridge the gap between their 33 and their 55 with something in the middle that's light and powerful, that doesn't cost us through the nose [/quote] I bet OS already has a 44 prototype running.
Posted on: 7/20/2012 11:00 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11163229

RE: New DLE 35
Anyone know the exhaust port dimensions on this engine? I asked one of the factory authorized dealers a few weeks ago and got no response.
Posted on: 7/15/2012 11:31 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11156862

RE: New DLE 35
[quote]ORIGINAL: rmoose One would think by the time you get to level in this hobby. a prop would be the least of the exp.$ and besides id never trust a nylon apc on a big engine why distroy yourself and the airplane when is either breaks or comes off at you. thats why they have all those bolts holding it on the hub to start with.? Have you ever seen a prop shatter not very cool... im not talking crap just giveing the facts [/quote] The amount of money spent is irrelevant. APC makes props in sizes and pitches that are not common in wood props, especially for pattern plane use. APC props work great on the YS engines which are in the same power neighborhood as a 35cc gas engine. The multi bolt hubs on little gas engines are there so you can get that big boy look on a little engine. They are not needed in this size engine. A single bolt hub allows the use of ANY prop so it would make more sense than the multi bolt setup which creates a pointless limitation. I have used APC since they first came out. Never had one shatter or seen anyone else shatter one. One the other hand I have seen plenty of guys break the bolts on a multi bolt hub. I don't blame the hub though, user error.
Posted on: 7/15/2012 10:22 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11156852

Purchase GT gas engines without mufflers?
Any chance the GT series gas engines could be sold without mufflers the way some of the glow engines are? Thanks.
Posted on: 5/8/2012 11:51 PM by Author "aerobear" in the forum "O.S. Engines Support"
http://www.rcuniverse.com/forum/fb.asp?m=11073840

OS GT22
http://www.os-engines.co.jp/news/webdir/15/1.pdf Looks nice. Any bets on a 44 coming soon?
Posted on: 5/8/2012 11:42 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11073836

RE: Gas engine cooling and test results
Nice diagrams. Another method to accomplish the baffling on fully enclosed engines is to glue foam rubber to the inside the cowling. It is easily shaped as needed so that when the cowl is in place the foam almost touches the cooling fins, forcing air through the fins. The foam is light and handles vibration well. I used white foam from the fabric department of the local Mega Mart. A quick blast of black spray paint and it disappears inside the cowling.
Posted on: 5/8/2012 3:15 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11072346

RE: #4 ignition module of DLE20
I can update my radio and chargers over the internet with a USB cable. If Rcexl made their ignitions like that, you could pick the advance curve you wanted. Better yet, a user customizable curve with handy app to tune out the rough spots where your aircraft vibrates. Even better, program it from the transmitter. Radios now days have customizable curves for anything you want so why not ignition? Flip a switch or twist a knob to change the curve. Maybe that's a bad Idea. The "Custom advance curve" thread would reach 500 pages in about a month. The first 400 pages would explain over and over that you can't expect a custom ignition curve to fix poorly adjusted needles. The engine companies that use Rcexl would not use it since they would need double their support staff to handle all the inquiries on screwed up ignition curves. It could be an aftermarket item only. There would not be enough time to discuss oil mixes and fly too.
Posted on: 5/6/2012 7:20 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11070913

RE: OS-120AX cookbook
[quote]ORIGINAL: F-4 Aerobear Thank you for the response. I will look at the Jett muffler. No argument on the advantages of electric. Whose CF pipe is that? I have used the Aeroslave pipe on my 160s, so have some tuning experience. John [/quote] It's the [link=http://www.escomposites.com/2%20cycle.htm]ES2C120AX[/link] pipe from ES Composites. About 150g with header and coupler. The Jett
Posted on: 5/1/2012 11:28 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11065036

RE: Favorite resin for glassing?
Hey WYO, Where are you getting the MGS? I see Aircraft Spruce is charging and extra $75 ($25 hazardous + $45 box fee) to ship a quart of slow hardener for the 285. That's on top of the cost of the hardener. I prefer Spruce or Wicks rather than the hobby places. The usual hobby dealer shipped me a set of MGS with only a month to go before the expiration date. I never had a problem with it but I would prefer fresher stock. I have used the MGS 335 to save a few bucks over the 285. I like that you can combine the slow and fast hardeners to customize pot life and cure time to the task at hand. The slow with just a dash of the fast gives plenty of working time.
Posted on: 5/1/2012 12:48 AM by Author "aerobear" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=11063638

RE: OS-120AX cookbook
[quote]ORIGINAL: F-4 ....so maybe all have gone electric...... John [/quote] In pattern, mostly electric now. The AX works very well with tuned exhaust. The Jett tuned muffler gave about an extra 800 rpm over the stock muffler with an APC 16x8. The Jett has no adjustment so you have to stay within it's tuning range, around 9500+. Pretty loud exhaust. The carbon pipe boosted anywhere from 750 to 1000 depending on prop and nitro content. I did not try it but I would bet APC 15x10 or 16x10 would work well for pattern use with a pipe. Header length? If you have to ask..... It's best to learn how to tune it. This is another attraction of electric, it's just simpler. The pics show a Mueller header which is no longer available. Just Engines will custom make headers. Whatever exhaust works on the AX will also work on the DLE 20 with a flange change. The DLE probably outsells the AX by 10:1 these days. About the same power and weight. Pump carb is a plus over glow.
Posted on: 4/30/2012 11:50 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11063619

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
[quote]ORIGINAL: acdii Can the carb be rotated 180*?...   [/quote] Yes.
Posted on: 4/24/2012 5:39 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11055398

RE: Gas engines on Pattern: DLE?
[quote]ORIGINAL: Voldos Are you sure, these engines are really DLE ? The global shape don't match... have you a link ? Thx [/quote] The rear exhaust engines are discussed on a different forum. RCU will not allow a link to the other forum. You will have to type f l y i n g g i a n t s (no spaces) into the space where **** appears in the link. http://www.flyinggiants.com/forums/showthread.php?t=72869&page=8 There is no official word but the engines were confirmed by Jedijody who is a reliable source. The rumor on the other forum is that the engines will available in May.
Posted on: 4/23/2012 9:21 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11054443

RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
Yours must be a top 1% engine. Ran mine yesterday and today. Got ~8050 with the Xoar 17x6 and stock muffler. Mine only has about 1/2 gallon through it so maybe more break in will improve it a little bit but I don't expect anywhere near 8800 with the stock muffler. My Globee optical tach is sensitive to lighting conditions. If everything is not just right then it reads high. I have the plug in RCXL ignition tach hooked up and just use the optical tach for double checking. Both Xoar 16x8 and 17x6 turn about the same static rpm on my 20. [quote]ORIGINAL: mach2 [quote]ORIGINAL: raydar 8800 to 8900 is optomistic with a dle 20 on a xoar 17 6 , not saying not possible but I have a dle 20 and have had a couple of other 20cc motors and 8500 rpm seems to be impossible with perfect timing and peak tune. If I could run 8900 with a 17 6 xoar I would be fitting a 18 6,not likely. [/quote] Dunno, maybe I just have a strong runner.... I had to tear it down again because of a crash due to some type of signal loss to the Rx. This time I changed the crank and front and rear bearings. It seems tighter to turn over after I did the bearings so I may lose a few hunderd rpm this time around until it breaks in a bit. You think getting 9120 with a 16x6 is optomistic to? I know my little motor is a hell of a powerhouse. Thats why I went with the 17x6. Either way, shouldnt they be getting more than 7400 with a 16x8??? I think so....Its about 1,000 rpm less than what Id think they would get. Jeremy [/quote]
Posted on: 4/18/2012 8:19 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11048008

RE: Gas engines on Pattern: DLE?
Finally, some rear exhaust gas engines. DLE 35R DLE 55R
Posted on: 4/14/2012 2:35 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11041841

RE: OS 33GT Gasoline Engine for Pattern
[quote]ORIGINAL: MTK I consider the subject closed....[/quote] Wait! What happened to the lightened 55? If you had a pattern plane optimized for the 33 and one optimized for the 55 which do you think would have the advantage? Could the 55 make weight? Have you decided that the 55 is not worth pursuing now that you have the 33 working well? Thanks.
Posted on: 3/22/2012 11:47 PM by Author "aerobear" in the forum "RC Pattern Flying"
http://www.rcuniverse.com/forum/fb.asp?m=11011534

RE: Walbro Carb for DLE30
[quote]ORIGINAL: Speedy-Gonzales Go back and look at the OP. This guy wants to know what type of carb..... NOT what is the the machine that puts the type on the carb!!! Get back on the subject!!! Who gives a fucking rat's a$$ about what the machine that puts the numbers on the carb looks like! [/quote] The issue was whether the numbers were made by the manufacturer or an individual with a hand held marker. Very much on subject, not that it's up to you to determine that.
Posted on: 3/9/2012 6:43 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10993586

RE: Walbro Carb for DLE30
Here is a video of what makes the numbers. [link=http://www.youtube.com/watch?v=qa1kKMEoL54&feature=plcp&context=C4a423e0VDvjVQa1PpcFPMisds9T3YPzgwxh5rcOn9C9jrbCganyI%3D]Dot Peen Marking Machine[/link]
Posted on: 3/9/2012 5:51 PM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10993531

RE: DLE 20 With an ES Composites Tuned Pipe
[quote]ORIGINAL: SpinnerRow I'm going to try an [link=http://www.horizonhobby.com/products/tuned-silencer-26gt-1-6EVO30943266]EVO GX26 tuned silencer[/link] next to see if that works better for this engine. I'm going to have to stick with a 17'' prop as I just don't have the ground clearance for anything bigger after flying the new plane this weekend. Anyone have any thoughts on this plan? [/quote] Either pipe will work. Your choice of pipe is not the problem. I would not spend more money hoping it will solve your problems. Even mousse cans can work. I have a 26G and an old macs header that maybe could fit the DLE. If the weather cooperates maybe I can give it a whirl sometime this week.
Posted on: 3/6/2012 11:32 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10988832

RE: DLE 20 With an ES Composites Tuned Pipe
[color=#0000FF][quote] I have the ES Composites 26G pipe.[/quote][/color] That should be fine. The 120AX pipe is just a shorter version of the 26G. The 26G is a bit too long to work with a wrap around header on 20cc. The coupler ends up right up against the last bend on the header. With a standard side exhaust header there is only one bend so the coupler has more room. [color=#0000FF][quote]Well, I don't think the header that I was using is long enough to start with.[/quote] [/color] Well, that's easy to test. The difference from inlet to first baffle on the 120AX and 26G pipes is 2.5" so your header will have to be shorter than my AX pipe setup. [color=#0000FF][quote]The stinger outlet diameter is a bit small on the ES Composites pipe I thought. The EVO has a 1/8'' larger diameter stinger outlet.[/quote][/color] That's not the problem. Either pipe will work. The 26G was originally made for the guys running the MVVS/Evolution 26. It worked great for that and it's 6cc bigger than the DLE 20. Buying a different pipe may let you accidentally stumble onto a combination that works but that's not the right way to go about it. You need to follow a systematic procedure so that you can see the results approaching that point you want to be at. Even mousse can setups can give great results. Haphazard approaches can give some improvement but without following a systematic approach you would never know if you have the optimum setup. [color=#0000FF][quote]To do testing, you must use a really short header so that you have room to change the length with the silicon tubing.[/quote][/color] It beats guessing. I had the advantage of pulling a high rpm setup from a different 20cc engine so I knew I was already close and could add header length for lower rpm.
Posted on: 3/6/2012 11:23 AM by Author "aerobear" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10988821