| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 1621.1 | strange problems, strange counteractions | JGODCL::CLEEUW | | Mon Aug 22 1994 03:02 | 13 |
| Hi Wayne,
just my 2c on this.
If I compare this with the large planes where the RC guys actually sits
in the plane ;*) I wonder if you might have a low pressure in the tank
that prevenst the fuel being sucked into the engine.
Is pressure added on top of the fuel tank (or is this normally not
required for this kinda engine) or is the fuel sucked out of the tank.
If you susspect , as you call it "foaming" of the fuel, would it be
possible to insert a small piece of material in the tank that keeps the
fuel calm (like a small balsa piece that floats on the fuel and levels
it). Yes I agree this sound silly but who nows the starnger the
problem, the stranger theactions to solve it.
Cheers - Cees
|
| 1621.2 | Most likely an air leak | SNAX::SMITH | I FEEL THE NEED | Mon Aug 22 1994 08:13 | 12 |
| Could be a foaming problem but you should be able to see that on the
ground. If the tank is hidden by the body, take the body off, tie the
chopper down and run it up to full throttle. If it's foaming, you'll
see it.
Check again for air leaks. Especially the fuel line "inside" the tank.
You'll have to remove it to check it. If it has a hole or split, the
engine will run normally as long as the hole/split is below the fuel
level. As you use fuel and the fuel level drops, the hole/split becomes
exposed and starts sucking air. If you ALWAYS have about a half tank of
fuel left when it does this, I would STRONGLY suspect a leak in the
line inside the tank.
|
| 1621.3 | More info. | LEVERS::WFIELD | | Mon Aug 22 1994 12:28 | 16 |
|
RE .1
Yes it is hooked up to muffler pressure, and I have checked to be sure
that the lines are not swapped. I have also presurized the tank with a
fuel bulb and checked all connections for leaks.
RE .2
I suspected a split in the line inside the tank as well. However I am
able to richen up the mixture, and it runs fine below a half tank. I
just can't get a needle valve setting that will remain constant through
out the entire tank. Probably the smart thing to do at this point is to
remove the tank and replace the line inside the tank. I guess I have
just been resisting doing this because the tank is brand new, and it is
such a pain to get at.
Wayne
|
| 1621.4 | Check Tank Height | LEDS::WATT | | Mon Aug 22 1994 12:46 | 7 |
| Wayne,
Tank height is important. If it is too low, you will go lean as
the level goes down. The tank should be located even with the needle
valve assembly.
Charlie
|
| 1621.5 | Fuel problem???? | STOHUB::JETRGR::EATON | Dan Eaton St.Louis,MO,USA, 445-6522 | Mon Aug 22 1994 13:25 | 5 |
| Wayne,
Have you tried some different fuel? I had simular problems when I tried a gallon
of Rich's Brew fuel I switched to Cool Power and had no more problems.
Dan Eaton
|
| 1621.6 | Last but not least | SALEM::DEAN | | Tue Aug 30 1994 12:52 | 5 |
| If after you have found no problems with the fuel tank and all the hook
ups, (or fixed them all) an still have the problem, try a new plug.
Dennis
|