RE: What Gas Engine to Replace a YS-110?
it is actually possible to reduce the mess and the costs by a good amount by reducing the oil and nitro content. A clubmember flies his YS:s on 15% oil and only 10% nitro and i ran mostly the same fuel when i had my YS.
Posted on: 4/11/2010 6:23 PM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9653518

RE: What Gas Engine to Replace a YS-110?
A good 26cc gas engine will give the same performance as the YS110 but be heavier and larger in overall size. If you want to replace the YS to reduce the 20% nitro fuelcosts then look for electric power IMO.
Posted on: 4/11/2010 6:06 PM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9653481

RE: SAITO FG-30 4-Stroke Gas Engine
[quote]ORIGINAL: fleetyle Displacement:29.11cc Bore:36.0mm Stroke:28.6mm Engine Weight:1335g Muffler Weight:83g Mount Weight:190g Ignition Weight:158g Prop Range:16x8–17x8 RPM Range:1,700–9,000 rpm [/quote] Engine weight 1335gr?? that most be the total up weight including the mount and the electronic ignition. Horizon webpage says "engine weight only 31oz" which is about 950gr. I wonder why Saito dont makes a 60-80cc single cylinder fourstroke gas engine?[:D]
Posted on: 3/23/2010 4:23 PM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9605720

RE: saito 150 fuel changing
After run oil is not needed for an engine being used regularly on weekends and IMO it makes more damage than good for the engine because an engine will not be 100% dry after a flight even if the fuel tube is being disconnected. And the next time you fire up the engine it will shake, smoke and smell bad because of all that unecessary oil inside the crankcase which will also strain the con.rod, bearings and the crankshaft. About the fuel i know some manufacturer use the volume to calculate and determine the oil and nitro % while some use the weight. Whatever fuel you choose is ok as long as it contains some castor oil and you setup both needles sligthly richer to begin with and listen to the engine on the first flight and specially when climbing vertical and if it would show any signs of sagging or loosing rpm then land and open both needles slightly. I use a homebrew fuel which contains 15% oil syn/castor and 10% nitro and it works great on Saitos and any other engine. I always set both needles slightly rich.
Posted on: 3/21/2010 1:59 PM by Author "Flyer95" in the forum "RC Fuels"
http://www.rcuniverse.com/forum/fb.asp?m=9599807

RE: VT 42 GAS FOURSTROKE NOW AVAILABLE
Thats an very strong fourstroke gas engine! Is it any special maintenance or regular lubrication needed for this engine running on only 1:30 lub./gas? I am very surprised that not many other gas engine manufacturer make fourstroke engines.
Posted on: 3/20/2010 7:01 AM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9597029

RE: OS Engine Prices - Then and Now
Yes, computerized manufacturing, more competition, but also a much bigger market and volumes helps to keep the engine prices down. The entire hobby in general is much more affordable for anyone today than it was for 30years ago.
Posted on: 3/19/2010 7:09 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9595943

RE: OS .108 VS ST 90 pow diff?
For normal aerobatic flying with big loops and rolls this engine will power that plane nice but if you are into hovering or 3D i would recommend a fourstroke, Saito180.
Posted on: 3/19/2010 6:47 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9595899

RE: OPS Engine help needed badly.
I hade the OPS MAXI 60cc twin for some years. It did not had the original Del-Orto carb. but had an homemade slide carb. with a separate Mikoni pump. It was ok on power, a little stronger than the STG4500 which it replaced but it dropped a cylinder sometimes in the air and caused me to land. Important is to use the correct fuel which is maximum of 5%oil and methanol for the rest. I only benchran my 30cc:s with tuned pipe and the original Del-Orto carb. for a short time and it seemed like they had great torque easily turning an APC 20x12 prop. If the Del-Orto carb is not working well, and difficult to find parts then i think another 90-120 carb. can be fitted to these engines.
Posted on: 3/17/2010 4:24 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9589030

RE: Super Tigre G-90 With A Pipe
[quote]ORIGINAL: SpinnerRow After the engine was mounted up on plane, I found the high speed needle valve was just about worthless. I had a 13x8 Master Airscrew Scimitar on it and it was turning 11,500 or so and struggle to get that. It was running lean and no amount of high speed needle adjustment would fix it. So I decided to try a Zinger Pro 13x6 and it responded with 12,600 coming up on the pipe and running super rich. The needle valve was useful again. I had to turn it in almost two turns to get it to lean out but it was no longer running lean. Motor was running strong with good throttle response. Is the pipe too short for the 13x8? Any of you pipe gurus care to explain why this is happening? [/quote] What Cyberwolf wrote about the pipe size is absolutely correct. Too small pipe volume or pipes with too restrictive internal or of wrong design can give very much problem for twostrokes running behaviour and performance. When it comes to twostroke muffler and pipe an slightly too big wvolumes is always better than slightly too small. Now from your description of the engine running better with the smaller sized prop my conclusion is that the tuned lenght on this pipe is simply too short. ST90 should be able to turn anything in between 13x6 to 15x6 and you really should not need to adjust the pipe lenght if it from the start was setup long enough to handle the largest prop 15x6. With a long enough setuped pipe system you only need to adjust the needles slightly if changing the prop size to a slightly smaller or larger size. A too short pipe lenght or too large a prop. for the tuned lenght will not allow the engine to get on the pipe and you lean and lean the main needle until it goes too lean and stops. A slightly too long tuned lenght for the prop used is actually very good for sport use and makes the needle adjustments much easier and gives you more linear throttle response to fly the Ultra Stick much better and the plugs last much longer. A good piped system for everyday sport use should give about 800-1000rpm more than stock muffler for any prop. in the range. If it is not happening then the pipe lenght, volume or something else is wrong.
Posted on: 3/14/2010 3:31 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9581426

RE: OS .108 VS ST 90 pow diff?
ST are a little on the heavy side but i am a little surprised that the G2300 "23cc" is heavier than a DLE30cc? Maybe ST needs to redesign the engine line and shave of some dead weight?[:)] However the problem with twostrokes gas engines and DLE30 is that one need another aftermarket quiet muffler to keep the noise down to an acceptable level for everyday use. It will weight atleast 5 times more than the original muffler, which is only an exhaust deflector, and that will add up to the total weight. Compare the DLE30 to the Saito 180 which has a lower total up weight and give about the same performance and trust by turning a smaller prop. faster. The 180 is also much smaller in size, have the carb. in the right place and sounds nicer[:D]
Posted on: 3/14/2010 2:55 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9581352

RE: I prefer 2 strokes
A twostroke on a tuned pipe is best for high speed dive when you really push the airplane and punish the engine at WOT and it sounds as it gonna explode any time[:D] Small sized twostrokes on a muffler just makes annoying sound and usually are low on power[:D] Twostrokes are also durable and less expensive on a trainer for newbies doing bad landings every other flight. For everything else fourstrokes are preferable IMO.
Posted on: 3/12/2010 1:40 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9576012

RE: The FIRST Glow Engine You Ever Owned-remember?
Hi, Cox Black Widow on a C/L plane was my first engine around year 1983[:)]
Posted on: 3/12/2010 12:45 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9575884

RE: Flying time OS 95AX vs Saito 100
OS twostrokes are good but as mentioned before the Saito fourstrokes are more reliable and for that reason alone i would use a Saito for a Yak54 specially if you do 3D or hovering. I use a 16oz on my Saito180 and it easily lasts 8-10 mixed flying with some spare fuel for landings.
Posted on: 3/12/2010 12:40 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9575875

RE: OS .108 VS ST 90 pow diff?
Hi, OS108 was one of the best running and most reliable twostroke glow engines i had much because of the 7D carb. And you can thrust mounting this engine on a airplane you like. The OS120AX which replaced the 108 is also a very good solid engine but carb. design is more simple like any other modern OS twostroke engine. ST90 is not as powerfull, reliable or pleasureable to operate. Both engines wake up and give 1000rpm more on a tuned quiet pipe incase you need the extra power.
Posted on: 3/12/2010 12:26 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9575845

RE: saito 220 ony 300 RPMs more than saito 180 ?
After i had few gallons thru my 220 i had to change the bearings because of some radial play. After changing the bearings to another nice brand the performance went up a whole lot maybe 200-300rpm.
Posted on: 3/3/2010 3:18 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9550631

RE: OS fs-120III w/pump vs Saito fa-125a
I have had both engines and on a 3D i would go for the Saito 125 because it is much lighter than the OS120FS which is an old design. I had my Saito 125 on UCD 3D 60 from Great Planes and did many slow nose up manouvres and hovering at 1/3-1/2 throttle and it never lean out. A very reliable engine just like all other large Saitos i have!
Posted on: 2/21/2010 3:24 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9523414

RE: Super Tigre G-90 With A Pipe
Yes, if the engine does not responds so well to adjusting the main needle, or sounds rough on wot, then the compression probably is too high and would be better with an extra head shim.
Posted on: 2/18/2010 11:32 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9514856

RE: Super Tigre G-90 With A Pipe
Nice results! A slightly longer pipeheader is always a good idea. I have had better succes with OS-F plugs on my 90 or larger twostrokes. It can clean up the midrange slightly and give more explosive throttle response too. 22% oil is actually too much as 15-18% is more than enough. Too much oil in the fuel gives more adjusting problems, rich midranges and more risk for deadsticks.
Posted on: 2/15/2010 2:54 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9506841

RE: Tuned pipe question
The only way to know that is to try it out. When pipe volume is too small then engine will usually run too hot and have difficulty to develop full power or "get on the pipe" High needle settings will also be very lean and difficult. One cheap "maybe" cure is to drill out the stinger so the engine is able to blow out the exhaust and not get too much backpressure and heat. But before any modification just try it out as it might work perfect as it is.
Posted on: 2/10/2010 8:19 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9492314

RE: Why does my engine make this noise while starting?
[quote]ORIGINAL: Lowflyer281 It was just running about 3 days ago but today i tried to start it and it just keeps on making this weird noise and wont start. I made a short video to show you <a href=''http://www.youtube.com/watch?v=_bRvhXTD4zQ''>http://www.youtube.com/watch?v=_bRvhXTD4zQ Thanks Mike [/quote] Hi, I think i know the problem with your engine[8D] The prop. and spinner is sliding against the engine prop.hub so every time engine fires it sound like that but usually wont run. The reason for this sliding is the spinner. Remove the spinner and it should be ok. Ofcourse the prop.nut can be slightly loose too!? I usually avoid spinners for as much as i can and plastic ones are even more unpredictable.
Posted on: 2/6/2010 10:00 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9481180

RE: Thought I would ask you guys too...
[quote]ORIGINAL: Mr67Stang Thought I would ask you guys too... I asked this in the extream speed prop forum as well. I have a TT .61 Pro in a full Mac's tuned pipe. I'm spinning an APC 10x8 at 15,000 RPM and still have a noticeable smoke exiting the pipe so I feel comfortable with my top end adjustment. I had to lean the bottom end to get it to transition from idle to full without falling on it's face and dieing out. Now I still have a sluggish transition when comming up off idle and when I land after a 4-5 minute flight it dies during the roll out. Since I end up having to land this plane in excess of 40-50 MPH (to keep the engine running for possible go around) I end up walking 200-250 ft to go get my plane. I know it's good excersize but I would prefer a more reliable idle[:D] [/quote] Your engines behavior makes me think that you have a too large prop for these high rpm, try a APC 9x8, lean the needles and let the engine sing happily instead[:D] Idle to midrange to WOT should be explosive. Too large prop or too short tuned lenght is partly the reason for the sluggish idle and midrange. The glowplug is too cold or worned out, try a hotter high quality plug to clean the midrange. Sometimes hotter plugs gives same or better top end performance and because of the richer setting the engine gets better lubrication and reliability. And the tank size might be to large leaning after landings? 8-10oz tank volume is ok and it should be very close to the engine using normal sized silicon tubing with a minimum innerdiameter of 2mm. If you have any leaking in the engine, carburetor or the needles it gives also bad and unadjustable midrange and idle. Sometimes needles, specielly the idle needles are loose because of bad design and can move in flight, partly because of the vibrations but also because of the carb-drum movement, and that surely will cause many adjusting problems. So look for needles before and after flight so it is not rotationg. The system should work nice and troublefree if the engine and carb. is in good condition and, prop.load, plug and tuned lenght is somewhat correct.
Posted on: 1/29/2010 10:31 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9458193

RE: Will 4 stroke glow stay cooler in slow flight?
[quote]ORIGINAL: kurt2022 I have Funtana x100 and I love to fly it in slow knife edge circuits as low to the ground as my ability lets me. The problem I am having is I have had several different brands and sizes of 2 stroke glow engines in her and when I fly the funtana in a slow pattern such as a knife edge with full rudder and the tail dropping way down the engines always seems to get hot and wear out quick. I installed an oscilating perry pump on the last engine to prevent leaning out, and this latest engine has recently has started to lose power from getting too hot. Will a 4 stroke glow engine handle this type of flying better than a 2 stroke? I recently replaced the tank and fuel lines am still having the problem. Any advice would be a great help! [/quote] What w8ye said is correct and i will add that your idea about fourstrokes is correct too. They suck fuel much better than twostrokes and will not have same leaning and overheating problems. Engines leaning out in flight is usually the main reason for overheating. I would suggest a Saito fourstroke engine for your planes. Try not use the largest suggested prop. in the chart for each engine. Slightly smaller is always better.
Posted on: 1/29/2010 3:17 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9457654

RE: Quadra 100 engine just L@@king
Twostroke performance depends a whole lot on the exhaust system too. Tuned pipes are best for twostrokes but large mousse can mufflers are good on power too and quiet. The weakest twostroke engine will however outrun the strongest one in the same size if the exhaust system is superior and better tuned. Modern engine manufacturer recommends slightly "too large" of a prop and higher pitch to lower the engine and prop-noise and the newer designs are made to handle the higher loads a little better and still function "normally". However too large of an prop. makes any engine sluggish whether it is gas, glow or electric motors.
Posted on: 1/28/2010 3:34 PM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9456162

RE: Quadra 100 engine just L@@king
[quote]ORIGINAL: rcwarbirdbuilder lighter means more lead needed in the front for balance, but the more power sounds good, and I need the rear exhaust on the cylinder. p.s. Maybe you can explain, I just saw a add for DA85 advertised with prop use of 26x12, I use a 24x12 on my 100, I just don't understand how 85cc can generate that much more power than a 100cc. [/quote] Hi, To reduce the noise level of big engines manufacturer has made engines which can handle larger props with more pitch than the older designs. My older Brison 5.8 gladely turned a 24x12 or 26x10 as a max propload. Any bigger and the performance would suffer. Modern 80-85cc engines are not stronger than a 100cc but they are lighter and can turn the same props and rpm probably on a mousse can or a pipe but it doesnt mean smaller props would hurt. Whenever in doubt go for slightly smaller props.
Posted on: 1/27/2010 12:58 PM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9452812

RE: ST 3000 vs CRRC 26
[quote]ORIGINAL: everwood I am building a Ultra Sport 1000 and I have a delema. I have a new ST 3000 that I was going to use in this plane, but at the Kansas City Swap meet yesterday, I bought a new CRRC 26 that I think I can fit inverted. The ST3000 weighs 3lbs.8oz. with muffler and the CRRC weighs 2lbs.11oz. with muffler. And the ST3000 firewall would set back in the fuse 1 3/8' more than the CRRC gas engine. I like the idea of gas because of fuel costs, but I am more concerened with overall performance. I am new to the larger ST engines and this will be my first gasser so- Any comments,opinions or ideas would be greatly appreciated. Wayne [/quote] I just want to add that big ST alky uses low oil fuel and no more than 10% oil is recommended for it to function ok. So one can buy a standard fuel containing about 20% castor-syntetic oil and 5-10% nitro and mixed it 1 to 1 with pure methanol so will be two gallons of fuel. If you need 30cc alky performance in gas then you should look for an 35-40cc lightweighted gas engine. I dont know how the crrc26 will fly that plane but probably you will need an tuned pipe to get good performance.
Posted on: 1/23/2010 5:38 AM by Author "Flyer95" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9440122

RE: OS 7D Carb
This carb works great on any twostroke engine larger than 15cc and up to the Super tiger G4500. Can sometimes be found on the ebay. I would also look at different hobby stores, call and ask them as it might be laying around somewhere without anyone asking for it. Not sure if Tower has all the parts to make a whole carb.?
Posted on: 1/20/2010 1:27 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9432362

RE: Engine silencer
It will not hurt anything to run more fuel thru an new engine but all mines and friends Saitos, OS, ASP......... fourstrokes have been in the air by the third tank of fuel. Fourstrokes generally run very reliable and predictable. The only trick is to set them up slightly rich on both needles. Both needles need to be adjusted from the factory settings before the first flight.
Posted on: 1/13/2010 9:52 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9412023

RE: Engine silencer
[quote]ORIGINAL: aerofly0610 I have many engines I want to break in. Im in an apartment complex with detached garages so I have a spot to run them. My dilemma: how do I quite the engines down while running them so I dont get evicted from noise? Ive seen photos of radiator hose attached to the muffler into a large metal can. Would that work? Thanks! [/quote] The best idea is like someone else mentioned above and that is to make a portabel running-in bench and drive to a flying field to run your engines. The idea of running-in a new engine is nice and exciting but if you have modern engines longer running in is not necessary. Just bolt it to your planes, run a couple of fuel tanks thru them , for about 20-30min, and after adjusting mixture and main needles the engines should be ready for flight. Thats what i have done the last 10 years and worked great every time. Running the engine in a garage is never good as it blows the dust and dirt around, makes to much noise no mather what you do and the engine can suck in dirt which will shorten the lifespann.
Posted on: 1/13/2010 6:07 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9411722

RE: Moki .61 LS INSTRUCTIONS
[quote]ORIGINAL: JCINTEXAS [size=3]Thank you Ray. This is great information and very much appreciated. I've been flying a MARK 1.35 and I've had to learn by just trying and going on experience from previous engines. I have expecially had trouble finding the right glowplug. The OS Type F worked just fine in warm weather. But on the colder days we are having now, the engine would suddenly quit suddenly and without warning. This would happen in the air will running at a rich 2-cycle. (5 percent nitro, 10 percent castor, 10 percent Klotz synthetic). I tried a couple different plugs and now am running a SIG long plug with an idlebar. This plug has ended the inflight ''flame-outs'' and the deadstick landings. Again thanks for the information. If I could win the lottery I would love to move to New Zealand and come fly with you. Best Regards JC[/size] [/quote] Hi, It can simply be that you have too much oil in your fuel. Too much oil in the fuel has only bad effekt like bad reliability, less power, more vibrations and more difficult to setup the engine and more slime on the airplane to clean up[:)] On a large engine like the Moki1.35 14-16% oil is more than enough but i prefer part of the oil package being castor oil. I know that the factory recommends 18-20% oil but i have learned the hard way that glow engines more or less never wear out but a deadstick can be the end for a large aircraft.
Posted on: 1/12/2010 8:18 AM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9409130

RE: Mark/Moki Engines
[quote]ORIGINAL: coachdavis10 What about FAI in big super tigres??? i'm assuming though that you can't run that in 4-strokes??? what about in smaller 2-strokes [/quote] You can actually hurt big tigres by running FAI fuel in them. The reason for this is that they will detonate and run very rough, vibrate and be much more difficult to setup and run. It is doable but not recommended at all. All this rough running and detonation puts enormous strain on the conrod, wristpin and the bearings. By FAI fuel i suppose you mean 20% castor oil and 80% methanol? If FAI is mixed 1 to 1 by pure methanol then it becomes the fuel for big tigres which is about 10% oil and 90% methanol. Some % nitro is fine to and OS-F glow plug or Enya3. About big fourstrokes i know that big Saitos like the 220,180 or OS200, ASP180FS all run fine on high oil FAI fuel but more than 16-17% oil is never needed and 5-10% nitro helps for lower idle. Fourstrokes generally benefit more of a syntetic/ castor blend of fuel with 20-30% of the oil being castor oil.
Posted on: 1/7/2010 3:24 PM by Author "Flyer95" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=9396054