Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

OS .25FX + MACS Tuned Pipe - Which prop?

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Old 12-05-2005, 01:51 PM
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tmproff
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Default OS .25FX + MACS Tuned Pipe - Which prop?

I just ordered the MACS tuned pipe/header for the OS .25FX engine. The plane is the Shrike .10 . Which prop should I put on the engine when I'm tuning the pipe?

Right now, Without the pipe (for the first few flights of my shrike) I am using a 9X6 and it's taching around 14k. What RPM's should I aim for with the tuned pipe?
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Old 12-05-2005, 07:48 PM
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Default RE: OS .25FX + MACS Tuned Pipe - Which prop?

APC 7x9 and you should get 18100RPM on the ground, with a 10% fuel

I have the same set-up and I love it, just a little tricky to launch it since the static trust is very low, but ones in the air
this baby is faaaaast. ( faster than the outlaw )
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Old 12-06-2005, 08:54 AM
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Default RE: OS .25FX + MACS Tuned Pipe - Which prop?

Master 8x7 with this setup, 10% at 16,300 RPM.
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Old 12-08-2005, 10:16 PM
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Default RE: OS .25FX + MACS Tuned Pipe - Which prop?

.25 with pipe....I'd go with an APC 8x6 then to an 8x7....I believe the engine will start to overheat with the 8x7. Fuel??? 15-20% nitro
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