RE: Evolution 58GT gas engine Ignition problem and CH Ignition conversion
Hi Ari, Over weight, over powered, and over there? (down under!) Way to go!
Posted on: 5/20/2013 2:14 PM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11517452

RE: Evolution 58GT gas engine Ignition problem and CH Ignition conversion
You will love the engine Earl. Take care that the front seal gets enough oil. A drop or two once in a while takes care of that.
Posted on: 5/20/2013 3:09 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11516814

RE: Piston build up, time to learn more from the masters...
Hard engine carbon looks like cheap oil, but condition and jetting is/was good. Too bad the engine is toast. Broken cylinder, bent rod, broken crankcase, probably bent crankshaft as well.
Posted on: 5/20/2013 3:06 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11516813

RE: Fuel question for MMVS .49 glow engine.
Just try the engine on the fuel at zero nitro/17% oil. If it keeps running strong you are good to go. The small MVVS do not like synthetic oil at all, but with the larger ones we had good results.
Posted on: 5/19/2013 11:50 AM by Author "pe reivers" in the forum "MVVS Support"
http://www.rcuniverse.com/forum/fb.asp?m=11516167

RE: Fuel question for MMVS .49 glow engine.
We have run these engines on as little as 2% castor oil without failures. However, try consistent running on synthetic oil first. if the engines takes well to it for a series of flights, all is well even without castor. If not, engine performance and tunability will get worse with every tankful, to be restored when the engine gets castor again.
Posted on: 5/19/2013 11:24 AM by Author "pe reivers" in the forum "MVVS Support"
http://www.rcuniverse.com/forum/fb.asp?m=11516145

RE: New Zenoah GT-80 misfire
260F is quite cool, depending on how you measure it. Topmost cooling rib, against cylinder wall, sensor isolated from cooling air. The best way is to measure plug washer temperatures. In that case, 400F to 450F is quite normal. Wingstrut did not provide any information on temperature sensor location/reading time and operating conditions at all. Maybe he can correct this, and provide some more useful information.
Posted on: 5/17/2013 2:56 PM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11514573

RE: New Zenoah GT-80 misfire
How are your plugs gapped? try increasing to 0,025" There may be too low voltage to your EI. OTOH, some ignitions "skip" when using too high voltage. Often this "skipping" is associated with early ignition timing as well.
Posted on: 5/17/2013 12:31 PM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11514456

RE: please identify this engine
Ryobi! Be careful, some Ryobi had a 7000 rpm electronic limiter in the flywheel ignition. You can check that out by following the patent pending number on the ignition.
Posted on: 5/15/2013 2:33 PM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11512526

RE: DLE 170 On board starter
[/quote] I got the link on the starter unit, but what about the gear behind the spinner? [/quote] The bendix starter gear needs a gearwheel on crankshaft as well. I thought you all new that. See post #14 for the idea.
Posted on: 5/15/2013 4:14 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11512026

RE: Gas cans for our gas motors?
[quote]ORIGINAL: earlwb [quote]ORIGINAL: pe reivers [quote]ORIGINAL: earlwb I like using the Dave Brown Six Shooter hand crank pumps for my re-fueling needs. I have used one for over 20 years no problem. So I don't mind using them at all. I am also trying out a Hangar Nine hand crank pump... gallon fuel/gasoline containers so they tend to use the same mix for quite a while too. Thanks Pe
Posted on: 9/17/2012 2:34 PM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11231475

RE: Gas cans for our gas motors?
[quote]ORIGINAL: earlwb I like using the Dave Brown Six Shooter hand crank pumps for my re-fueling needs. I have used one for over 20 years no problem. So I don't mind using them at all. I am also trying out a Hangar Nine hand crank pump on another fuel jug too. It is working OK too. I decided to not use the air pressure method of refueling as there is moisture in the air and when you pump the air into the fuel container, the moisture goes in with it too. Here in the USA our gasolines have ethanol in it too, and that ethanol likes to absorbs moisture a lot. So it tends to ruin the gasoline in short order, if you live in a locale with higher humidity levels. Plus when you let the air pressure out of the jug some of the volatile compounds in the gasoline evaporate out too. Now if your plane is big and you can use up a gallon of fuel in a day flying, then this wouldn't matter. But for me a gallon of fuel can last a month so I didn't want to have the fuel become bad from using the air pressure method. [/quote] Air and moisture entrance is not an issue with the bottle method because: 1) when mixing fuel, exposure time to air is extremely short. 2) storage is in small quantities with only about 10cc of air on top. 3) field use mostly sees all of one bottle consumed on the flight day. Here too, exposure to pumping air air is short during the 15 seconds it takes to fill the tank. Any less exposure, and you would need to transfer the fuel directly from the gas station to the airplane internal tank.
Posted on: 9/17/2012 9:13 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11231133

RE: Gas cans for our gas motors?
I use large (1.5 liter) old type thick walled Poly Ethylene coca cola bottles for gas storage. The child proof caps used on paint thinner cans fit and seal these bottles well. I remove the child proof ratchet though. I have made a special cap to pressurize the bottle with a bike tire pump for fueling the planes.
Posted on: 9/17/2012 3:16 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11230792

RE: ML-70, Klotz, Aerosave; which tolerates best high temperatures?
Fuchs had several oils. Aerosave was one of them and was concocted to make engines survive lean runs, and better their aerosynth. I have been long out of the glow fuel sports, and am not familiar with the #3 oil properties. Maybe someone else?
Posted on: 9/16/2012 12:18 PM by Author "pe reivers" in the forum "RC Fuels"
http://www.rcuniverse.com/forum/fb.asp?m=11230132

RE: ML-70, Klotz, Aerosave; which tolerates best high temperatures?
Fuchs aerosave is tailored to approach the properties of castor bean oil, so it should be best.
Posted on: 9/16/2012 6:45 AM by Author "pe reivers" in the forum "RC Fuels"
http://www.rcuniverse.com/forum/fb.asp?m=11229900

RE: Evolution 45GX starts backwards?
A healthy flip, heavier prop, or higher idle also helps, as well as programming for "long muffler" Instead of programming "long", the ignition can be set slightly later by loosening one sensor screw and rotating the sensor clockwise (looking at the sensor top)
Posted on: 9/12/2012 10:22 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11226234

RE: 3 blade prop for a RCG 20 cc gas engine?
[quote]ORIGINAL: Bob Paris I'm now breaking in two RGC 20cc gas engines on a Big Stick...and getting them ready install on a F7F from Troy Built models. I would like to go scale with the props and use three bladed props. I'm now using 17x6 props with excellent results and want to know what size three bladed props I should use. Would a 16x7 or 15x8~10 work ? I know I'm am supose to drop one to two inches in prop length and add one to two inches of pitch...but has anyone any experience with the RGC 20cc gas engine and three bladed props ? If so ... pleased let me know what you recomend. Soft Landings Always, Bobby of Maui [/quote] The rule is to go 10% down in diameter, eventually add 10% pitch as well.
Posted on: 9/12/2012 7:04 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11226037

RE: Evolution G26 tunning issue
The 26cc evolution gas engine can be set to idle as low as 950 rpm on a 18x8 prop! Been there, and collected bets for the engine not dying. A good idle speed for every day use is about 1500 rpm. If the L fuel needle is adjusted correctly, throttle response will be immediate. Lean the needle until the engine just starts gasping. Now you can do two things. Use slow on the servo (0.5 second will do) to get rid of the gasping, OR open the idle needle some. PS Nailing the throttle on an engine without accelerator pump carb always is a bad idea. Get used to smooth throttle stick application.
Posted on: 9/12/2012 3:55 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11225886

RE: APC Prop Constants...
No, I did not, but two universities did that in wind tunnels. My calculator proved up to 2% pessimistic in it's predictions, which is well within technical accuracy.
Posted on: 9/11/2012 2:20 PM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11225366

RE: How to rejuvenate a long stored OS 1.08 ?
[quote]ORIGINAL: spinner Thanks to all who replied to my request for info. I ended up soaking the engine (carb included) in denatured alcohol for 1 day. That got everything loose again so I then filled the engine with a super penetrating oil and let that soak for half a day. The bearings looked OK so I put it all back together and mounted it on my test stand. It fired on the first flip and ran well at low RPM but died due to overheating when I ran it at high RPM for about 30 seconds. I let the engine cool and restarted but alternated between high and low RPM for the rest of the 12 oz fuel tank. The engine seems OK now but I will probably bench test a little more. The bearings seem OK but may still be a little tight from congealed castor which would explain the overheating. Thanks again [/quote] Pay special attention to the carb fuel flow passages. They need a thorough cleaning before the engine will run well.
Posted on: 9/11/2012 2:17 PM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11225363

RE: APC Prop Constants...
My calculator works regardless of prop size OR fluid medium, even water! Just adjust the proper parameters.
Posted on: 9/11/2012 1:06 PM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11225301

RE: APC Prop Constants...
That is a nice and easy to use calculator. However, the quite limited prop constants of the Hungarian web calculator do not match the real world feed back that I use. A lot of work still has to be done here. The http://www.ae.illinois.edu/m-selig/props/propDB.html database has excellent numbers, which oo require a lot of work to convert the mean static Cp numbers of different props into the pitch entry of my calculator, which is pretty much rule of thumb for ease of use.
Posted on: 9/11/2012 5:43 AM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11224843

RE: APC Prop Constants...
If I had that list, I would have converted it. Take what you can get, and search for what you need.
Posted on: 9/10/2012 2:23 PM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11224125

RE: I need the rpms for a 1.60fx swinging an 18x6w apc
for $35.00, that's excellent performance.
Posted on: 9/10/2012 10:34 AM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223858

RE: Gas equivalent
Use a 1.60 or 1.80 glow engine. MVVS or Moki have good ones.
Posted on: 9/10/2012 4:45 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223501

RE: APC Prop Constants...
Some electric sites list the 1000 rpm watt value. Whilst APC are very constant in their production techniques, their prop power demand across sizes tends to vary considerably.
Posted on: 9/10/2012 4:43 AM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223499

RE: Ignition Module failure
It all depends on how you tested the spark. Out of the engine, the spark should at least bridge a 6mm ( 1/4" ) gap. If not, the coil is too weak.
Posted on: 9/10/2012 4:23 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11223491

RE: How to rejuvenate a long stored OS 1.08 ?
Last week I had an OS-FS91 rock solid from years and years of storage after using castor fuel.. Put a prop on for some leverage. After a while of sustained pressure, it slowly started turning, and then I used the crankcase vent line to get the engine full of ATF. Plugged the vent line and went to sleep. Next day the engine would turn over quite well, but no compression. Removed the valve cover, valves were stuck wide open. Dripped ATF down the pushrod tubes, the exhaust stack and in the carb. Next day, slowly turned the engine and pushed on the valve rockers to make the cam followers move. They freed up within ten minutes. ATF was expelled out the front bearings as the engine freed up. Bearings felt good, and engine flipped over nicely. This engine is good for another ten years of storage without freezing up.
Posted on: 9/5/2012 11:37 AM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11218448

RE: 4-Stroke Storage
+1 for the ATF treatment
Posted on: 9/5/2012 7:31 AM by Author "pe reivers" in the forum "Glow Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11218219

RE: Evolution 26GX
pictures?
Posted on: 9/5/2012 3:55 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11218045

RE: Throttle Spring vs Servo Current
Thanks for the info truckracer.
Posted on: 9/4/2012 3:48 AM by Author "pe reivers" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11216667