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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Thunder Tigre 50. (Not Happy)
10-13-2005 03:23 AM  12 years agoPost 41
FunHeli1

rrNovice

Montgomery, AL

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Well said TMoore....from what I have read and seen lately, the TT50 engine is definitely not forgiving. I was excited to have been able to purchase a Rappy 50 kit with the TT50 in it. Based on what I had read about it on Runryder, I felt that it was a good engine. And it still may be. If it has a sweet spot, it seems likely that it requires a person with experience with these engines to find it. Not to beat a dead horse, but nothing that I read, heard, or experienced helped me avoid the end result that I received. I am a very detail oriented person, so I was very careful in all of the adjustments that were made in an effort to correct the problem. Come to think of it, there hasn't been one time when I had my Rappy 50 in the air that I wasn't concerned about what the engine was going to do next. It was almost unnerving. Hard to relax when you have all those dollars signs being supported by an engine with a mind all its own. Anyway, I have ranted enough tonight.

Thanks for the encouragement stilltryin' on the OS50 Hyper and I will be sure to let everyone know what Thunder Tiger says about my new TT50 paperweight. I hope to get it shipped off to them early next week.

Thanks again guys.....where would we be without runryder?

Shane

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10-13-2005 06:41 AM  12 years agoPost 42
GroundPounder

rrVeteran

South Africa, Cape Town

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Of course I like nasty women too, so you take it for what it's worth! Ha!
Love that :-)

This might not be applicable to the problems posted on this list, but I think in general if someone has difficulty in setting up the TT50, he's going to have problems with most engines, escpecially if it that persons first forray into nitro engines.

My first TT50 I "ran-in" with castor oil, as per the instruction sheet, you know, that thing you have to read before starting ?

It ran HOT.
So hot, the head even had a nice brown colour.
Switched to 15% nitro, modded the low needle, LEARNED how to set it up, and it ran fine for almost 40 liters of fuel, then the rear bearing started to go.
I think it it got a knock from the initial hot runs.

Had a spare TT50, new ,around, so fitted that to the Rappy, used the carb from the old one.
Did the initial running in with my 15% nitro fuel, no sign of heat.
Then started getting lean runs, flameouts, found the tubing in the main tank starting to go.
ALWAYS replace the original tubing, it's crap.

My second Rappy, ( I know, flying TWO heli's, jeez ?), has run about 20 liters of fuel, unmodded needle, nice and cool, go figure.

So, can someone send me a Hyper, for a side by side comparison :-) ?

GroundPounder

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10-15-2005 03:19 PM  12 years agoPost 43
Danorn

rrNovice

Alberta

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TT50
Well I just did my second successful auto from about 50-60' due to a back bearing coming apart and seizing the engine. This is the third TT50 since I got the heli in Nov 2004. The first one didn't have the carb mod, and I knew nada then, so I think it got to hot. Second and third both back bearings let go. I run CP heli fuel very rich w/ about 18-1900 rotor speed. Mild 3d stuff. I really liked this last engine as I got almost 14 gals through it. The motor looked brand new inside other than the trouble it caused, pitting etc from the bearing pieces. I will send it away again and if they replace it again I will have no reservations about putting a TT50 back in the SE. It has tons of power and hasn't burped until now.

Daniel

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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › Thunder Tigre 50. (Not Happy)
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