TT .46 Pro
unbaffled stock muffler
APC 11-6
Omega 10%
Air temp. 18 deg C
Bar press. 101.2 kPa
13,200 rpm

TT46Pro
Stock muffler
APC 12.25x3.75
Cool Power 15%
Air temp 30 deg C
Humidity - pretty high for sure!
About sea level
12,400 RPM

TT Pro-46
Tower Muffler
70 Deg.
1,500 ASL

Omega 5%
OS-A3
12.25 x 3.75 APC
11.7K

Bisson Sport Strap-on Muffler
Omega 15%
OS #8 Plug
APC 12x4
Peak 13600 RPM
Measured thrust: 7.8 lb.

The Bisson Sport Strap-on Muffler sounds like a tuned muffler. I think 12x4 is too big for this muffler, as it will not slow down no matter how rich I adjust the hi-speed needle. Perpahs it does not give enough back pressure; yet it does not lean out when I hold the plane vertical. I shall try APC 11.5x4 and see what happens.

TT 46 Pro - recently purchased and has approx 5 gallons of fuel ran through it.
Tower muffler
Wildcat YS 20/20 fuel
APC 12.25x3.75
13,000RPM


TT 46 Pro - 6 years old (sat for 5) and has approx 3 gallons for fuel ran through it.
stock muffler w/baffle
Wildcat YS 20/50 fuel
APC 12.25x3.75
12,400RPM

My TT has run for three gallons since purchased 5 months ago.
Now it turns:
Temp:18 degrees C
ASL:0(I fly at see level)
Prop:12.25x3.75 APC
Fuel:20 nitro/22 oil Felix pattern fuel
RPM reading:12.150 peak
But richening to 11.500 for take off.
Pulls out my 4.2 lbs TT 3D spirit very well from a hover.

TT46pro Tower muffler
~3200 asl
10% fuel with 2oz caster oil/gallon added
APC 12x4
40 degrees- 13800 rpm
mid 50's- 13400 rpm
Inverted, can't get reliable idle. Mounted it sideways with pitts muffler. Will post results after next time out.
MikeB

TT46Pro with Tower muffler
sea level
10% Nitro
APC 11 x 6
12,000 rpm

10%
~3200 asl
70 degrees
APC 12x4
Slimline pitts muffler
12,600 rpm

Sorry, just realized this thead was for Thunder Tiger, not Tower Hobbies motors.

i Had a TT 46 pro, bearings finely gave out after close to 6 yrs. running Cool Power 30% heli fuel (run it in everything i have glow) it turned an 11x6 at only 15,200 with the stock muff.

kc

Sounds like you had and exceptional tt 46. What brand of prop do you use?

APC

kc

I just got a TT .46 on a plane I just bought an I was amazed.

TT .46

MA Black 11x6

Magnum 20/20 fuel

Around 200 ft ASl

Was running about a 2 inch spinner.

Peak of over 14,700!

Edit: this is a stock muffler.

tt.pro .46
12.25x3.75 APC
sea level
% 20/22 nitro fuel
12.100 rpms

Anyone have any readings for a TT 0.40? These are the engines my club (NEPRO) uses for Pylon Racing.

Thanks, Mike

TT pro .46 for pylon racing
80 20 fuel mix no nitro
10/6 RAM prop
14800rpm
not sure how high above sea level

that is a stock standard motor

Have any of you guys tried your Pro 46s with the baffle removed???? I have 2 of them on a twin and I am considering pulling the baffles. Also how did your engine run with the baffle removed?? Thanks Skip D

Before you do anything, try the stock TT Pro 46 with a 12x4 prop. I was amazed at the increase in RPM and thrust. It really turned up quick.

It was slower (due to the shallower pitch) so watch your turns on final (ask me how I know) but overall, I really liked that combination. Never pulled the baffle. Didn't feel a need to, but that's just my personal preference.

Bob

Ive got two and have removed both baffles... I dont have any numbers but they run fine and seem to wind up the 10x6 really well... will post readings next time I get out.

Thanks for the inputs guys. I am running APC 10x7s now on a Dual Ace. A 10 inch prop is about all I can get away with on this plane. How does the engine like the 10x6? Thanks Skip D

If that's a general question for anyone, my experience is that the 10x6 might be a bit 'light' for the engine (works better on the 40 Pro), but will give very acceptable performance.

If you are stuck with the 10" diameter, try the 10x6 and the 10x7 and see which prop fits your flying style for that plane.

If you were directing that question to Skip D, I apologize for butting in.

Bob