LIPO'S and minimum discharge voltage
I would like to know what the minimum discharge voltage is, I have heard everything from 3.1 to 3.4 volts per cell to avoid early battery damage.... what is the story? Thanks!
Posted on: 7/28/2012 9:46 AM by Author "WRK" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11172227

RE: G-45 Starting Problem
I think you may have an ignition problem, when warm it does not work correctly.
Posted on: 7/27/2012 8:12 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11171201

Looking for Clip-on Direct Current meter
Anyone know of a good clip-on D.c. current meter, something in the zero to 5 or zero to 10 amps that is accurate? Thanks!
Posted on: 7/25/2012 1:07 PM by Author "WRK" in the forum "Batteries & Chargers"
http://www.rcuniverse.com/forum/fb.asp?m=11168906

Eneloop batteries for ignition?
Anyone using Eneloop batteries for ignition? Wonder how these work for Ign and also wondering if they are good enough for flight packs?
Posted on: 7/18/2012 7:35 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11159814

RE: Scuffed high tension lead
Probably you are ok with 80% of the shield intact. If that engine uses a resistor spark plug, that reduces the chances of interference more so, even with a damaged woven metal shield.
Posted on: 6/27/2012 9:30 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11134675

Peak power RPM, how good is the fit?
I have a suspicion that on our bigger two stoke engines say 80 CC and up, most of the engines we use on our planes produce their peak power at a higher RPM than we usually run them, of course the exhaust system has a lot to say about that. I wonder if a change in port timing (and possibly other changes) would benefit some of the engines, that is bring down the peak power point to the low 6000 RPM range, where it could be better utilized. I would bet that a lot of the engines peak at 7000 RPM or better. Since many of the engines we use have major parts in them that come from engines not designed for R/C some of the manufacturers are probably handicapped as far as changing things too much. Just changing the exhaust port timing can really move the power curve around.
Posted on: 6/26/2012 1:00 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11132736

RE: KOLM ENGINES EZ 67 fourstroke Gas
How do the valves get oiled?
Posted on: 6/20/2012 8:18 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11125125

Favorite 3D combos?
What is [b][b]YOUR[/b][/b] favorite plane and engine combo(s) for flying 3D?
Posted on: 6/16/2012 10:45 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11120267

RE: Prop Strike and Bearings
Was a bearing bad?
Posted on: 5/13/2012 9:38 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11079153

Your list of hightest quality engines?
My list of best quality gas 2 stroke R/C engines, best first: (What is your list?) 1. MVVS 2. 3W 3. DA 4. BME 5. ? 6. ?
Posted on: 5/7/2012 6:58 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11071389

RE: EME new engines, 35,60 & 120 twin
What is the function of the sub spark? Good luck with your new engines, look like from the pictures that you are making most of the parts yourselves, that is an expensive undertaking!
Posted on: 4/30/2012 10:38 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11062699

RE: 3w 106 Question
I think you have an ignition problem.
Posted on: 3/27/2012 8:26 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11017003

RE: Ceramic Coated Exhaust...
I am surprised that the ceramic sticks to aluminum so well, not the easiest metal to coat reliably.
Posted on: 3/25/2012 7:18 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11014058

RE: Is it going lean ?
If you want to know if it is running lean in the air you can use a data recorder and check engine temp. With some practice you will find you can tell something about how the engine is set by listening to it. Just like the guys said it is like learning code it takes some time, I copy CW at 35 words a minute but it took quite a while to get to that speed, AB9K
Posted on: 3/23/2012 10:06 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11011965

RE: 100 OCTANE aviation fuel in gasser
Flame front travel is not signifigantly changed by going to hi Octane gas.
Posted on: 3/20/2012 8:30 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11008247

RE: 100 OCTANE aviation fuel in gasser
AVGAS = more cost, a bit less power and less smell, more toxic.
Posted on: 3/19/2012 6:54 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=11006767

RE: Life on ignition
i thought running Ign. and radio on one battery without isolator was a bad idea ??
Posted on: 3/14/2012 7:22 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10999641

bore re-chroming
Anyone know of anyplace that will re-chrome a cylinder? Seems to me someone mentioned it a while ago....
Posted on: 3/2/2012 1:47 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10984165

RE: Bearing preload
Antique is the case hot when pulling the two halves together with the screws, I would assume so but just want to make sure!
Posted on: 2/28/2012 8:14 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10980863

Bearing preload
Maybe this has been discussed before but I could not find a thread..... So February Model Aviation has an article on how to buy a used engine and in it the author states that if the bearings have been changed the bearing preload must be removed after assembling an engine, this is done by heating the case ( he does not say where exactly or if in the front or back bearing area ) and tapping the crankshaft with a hammer or mallet, he says "this will snap the bearing into place." Is this always necessary? Can you tell by feel while rotating the crankshaft if this needs to be done? Wondering if those here who rebuild engines go through this procedure or maybe some other procedure to "align" the bearings after putting them in the case?
Posted on: 2/27/2012 8:37 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10979362

RE: Carburetor improvements?
Oh but wouldn't it be nice to adjust that range just above idle without affecting the low or high end?
Posted on: 2/7/2012 9:22 PM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10949129

RE: Carburetor improvements?
Have to find out more about Walbro auto carbs sounds interesting.
Posted on: 2/7/2012 10:22 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10948202

Carburetor improvements?
What would you like to see in features for an R/C carburetor that we do not have now, or something that we have but needs improvement? I would like to see a three needle low, mid and high range adjustment capability. Would also like to see a priming function that pulls fuel to the carburetor and wets the carb. throat for fast easy starting even if the engine has not been for for a while, something like what you see on some weed eaters ETC. but improved. Maybe an accelerator pump but not sure that would always be needed and in some cases might be over kill. Also (and some older non R/C carbs. had this) the regulator diaphram atmospheric area internally vented to the air intake throat. Ideas?
Posted on: 2/5/2012 10:36 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10945139

RE: Which oil do you use?
IS there a difference between stihl Ultra hp and Stihl Ultra (no hp in name)?
Posted on: 1/25/2012 6:12 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10926643

RE: Any thoughts about these servos for Gas planes?
I prefer a servo that is a bit faster and has a bit better centering but the 645 is a good servo for a lot of applications.
Posted on: 1/16/2012 7:45 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10911406

RE: Photos of how to replace ignition cap??
The resister greatly reduces the "ringing" of the high voltage path from the coil to the plug, this ringing is what causes the R.F. generation, the resistor does effect the ignitions characteristics, mostly reducing the duration of the spark. The old booster gap was fairly effective in reducing plug fouling in some engines that were prone to it, the availability of modern oils that produce less deposits eliminated the need for the booster gap for the most part. The introduction of Capacitive Discharge ignitions systems with their very fast secondary voltage rise time did more than anything in reducing plug fouling in 2 stroke engines, Capacitive Discharge systems tend to produce more R.F. interference that older type of ignitions which is why more shielding is required when using them in close proximity of radio equipment.
Posted on: 1/15/2012 7:45 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10909720

RE: New DLE 55 always dies on taxi.
You may be idling at too low a speed in an effort to prevent it rolling on the hard surface, try increasing the idle RPM a bit and put some drag on the wheels and see if it keeps running.
Posted on: 12/12/2011 8:05 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10855609

Reed gap?
Must the reeds lay flat against the reed block with no light showing through or is a small amount of light shining through ok? (reed away from reed block just a few thousandths of an inch)
Posted on: 12/7/2011 9:12 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10847950

RE: C S ignitions
What is so special about this (that it cost so much) as an Rcexl conversion for $150? http://www.cncengines.com/ (srcoll down a bit to see it) "Complete kit to convert a Zenoah G-62 stock engine to Rcexl Electronic Ignition This is a bolt on kit and the Rcexl CDI has electronic advance for easy hand starting $155.00"
Posted on: 11/27/2011 8:39 AM by Author "WRK" in the forum "Gas Engines"
http://www.rcuniverse.com/forum/fb.asp?m=10831135

fabric covering material and fuel sealing
What is the best fabric covering material for ease of use? Is there a fabric covering that does not need sealing with some kind of clear coat to protect it from gas and oil? If a clear coat is uses what is the best for spray gun application that is fuel proof and does not yellow?
Posted on: 11/8/2011 1:56 PM by Author "WRK" in the forum "Questions and Answers"
http://www.rcuniverse.com/forum/fb.asp?m=10802995