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HomeAircraftHelicopterMain Discussion › 720mm blades on a Raptor 90
03-06-2008 10:59 PM  10 years agoPost 1
RMO

rrNovice

Brownsville, Texas - USA

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I am converting my Raptor 60 to a Raptor 90 with a Thunder Tiger conversion kit. I will be using an OS91 SX H. I am a sport flyer and I am not into 3D. I am looking for a stable heli. Can I put 720mm blades on the 90 or should I go with 710mm blades? Are any of you using 720's on an R90? I wonder if they clear the tail rotor. I am not too worried about bogging down the engine since I am not doing 3D.
I will be grateful for any info that you can provide.

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03-06-2008 11:20 PM  10 years agoPost 2
payne1967

rrElite Veteran

uk

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i'm using a 90 boom in mine (from the r90 not the conversion kit)
and i think the conversion kit boom is shorter than a std 90 one

with the std 90 boom i'm running 710 mains and 100 tails and there is enough room to use 720's i've never tried them so don't know how it will load the engine but choose your gear ratio's well as not to run the engine to slow or with to much load and use the heavy duty 90 clutch
the engine in mine is a c spec ps with the pump removed and the 60k carb as again i don't know what the power difference the 90sxh to the c spec is but i would think the c spec will have more power as it is the later engine, the power of your engine will effect what blade lengths you can use
also with 720's it will be gr8 at autos

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03-06-2008 11:28 PM  10 years agoPost 3
Lamar Cooley

rrApprentice

Houma,La.,U.S.A.

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720 blades on the Rap 90
RMO
I think you will like the 720's for your purpose.
For the price, I like the Mavrick blades from "Heliproz".
I've used the 700, 710 and 720's. I use 95mm "Mavrick" tail blades with the 720 mains. I just picked up a set of "Mavrick G5" and so far I like them.
Hope this is of some small help.
Regards


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There when needed.
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