Tachometer Readings Post your tachometer readings for your motor in here or ask others what they are getting out of their motor/prop combos!

25FX

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Old 05-19-2007, 12:04 PM
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TailTwister
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Default 25FX

Can someone give me a few real tach numbers to look at?

25FX with what fuel and prop please???

I ran one today with a 9x6 wood prop and got 12,600 rpm, with a pinch test peaking at 13K. Is this engine producing the correct power, or not?

My intent is to use this engine on a 3D profile plane, likely with a 10x4 APC prop.
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Old 05-19-2007, 06:23 PM
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oceansfiftyseven
 
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Default RE: 25FX

10x4 mas 13,500
9x4 mas 14,400
8x6 3-Blade mas 13,800
These numbers are using Powermaster 15%
I have tried the apc 10x4 on this engine and it was not happy. It does like the mas 10x4 though. Must be a lower load on the engine.
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Old 05-19-2007, 06:27 PM
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TailTwister
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Default RE: 25FX

Thanks for the numbers. I feel like mine is a bit low, but not horrible.

Any one else?
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Old 05-20-2007, 02:32 PM
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TailTwister
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Default RE: 25FX

OK, I'm feeling better. I ran an APC 10x3 and some good fuel.

I can get 14,700 rpm, if I want to. I'll likely try to fly it a hint softer than that, however...

The 9x6 TF prop must load quite a bit heavier than the APC 10x3.
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Old 05-05-2008, 09:16 PM
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SeamusG
 
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Default RE: 25FX

brand new OS 25 FX (3 tanks of 15%) with MAS 9x4 G/F G-3 nylon prop and AirScharnell Combat can (engine is running a bit rich and the can has not been tuned)
18,100 - 18,200
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