Inverted Thunder Tiger 91 ????
12-25-2002 | 06:04 AM
#4
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From: Evans,
CO
inverted 4s
Hi just be careful when you prime for the first run of the day! If the engine gets too much fuel in the cylinder you will hydro lock and could brake the connecting rod or crank shaft! Some people will start the inverted engines with the plane upsidedown on a cradle.
Regards
Mark
Regards
Mark
12-27-2002 | 04:50 PM
#5
Inverted Thunder Tiger 91 ????
As stated: Yes.
I have one in a WM Super Chippy.
I moved the fuel nipple to the other side of the carb by set-screw-plugging the original hole and drilling/tapping a new one. I found that the idle needle needed to be leaned a little more than if it were upright.
For propper engine performance use the supplied choke adapter.
High-end needle should be 4-4 1/2 turns out.
Break-in takes a fair amount of fuel and time. (This is NOT a bad thing!)
While my engine doesn't have a lot of time on it, it seems to like 14" props.
Do be careful not to over-prime an inverted 4S.
If you don't want the choke pull-rod sticking out the side of your cowl you can prime the engine by holding your finger over the muffler exhaust and turning the engine over with an electric starter-it doesn't take much to flood the engine! (By plugging the exhaust, pressure builds up in the tank and forces fuel into the carb.)
A remote glowplug adapter is a good idea also.
When storing an airplane with an inverted engine it is a good idea to build a cradle such that the airplane is inverted. In this manner the afterrun lube you use won't drain out of the bearings and collect in the head. I suppose storing it upright on it's nose would suffice.
Is this a new engine?
I have one in a WM Super Chippy.
I moved the fuel nipple to the other side of the carb by set-screw-plugging the original hole and drilling/tapping a new one. I found that the idle needle needed to be leaned a little more than if it were upright.
For propper engine performance use the supplied choke adapter.
High-end needle should be 4-4 1/2 turns out.
Break-in takes a fair amount of fuel and time. (This is NOT a bad thing!)
While my engine doesn't have a lot of time on it, it seems to like 14" props.
Do be careful not to over-prime an inverted 4S.
If you don't want the choke pull-rod sticking out the side of your cowl you can prime the engine by holding your finger over the muffler exhaust and turning the engine over with an electric starter-it doesn't take much to flood the engine! (By plugging the exhaust, pressure builds up in the tank and forces fuel into the carb.)
A remote glowplug adapter is a good idea also.
When storing an airplane with an inverted engine it is a good idea to build a cradle such that the airplane is inverted. In this manner the afterrun lube you use won't drain out of the bearings and collect in the head. I suppose storing it upright on it's nose would suffice.
Is this a new engine?
