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HomeAircraftHelicopterHelicopter Main Discussion › Raptor 50 to 90 Conversion!!!!!
10-12-2005 05:58 AM  13 years agoPost 1

rrElite Veteran

Monterrey NL

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Hi Guy,s, am planning to make a conversion from Raptor 50 to Raptor 90
The plan is to install a 90 engine to a 50 class heli (Raptor 50)
I will put 680 or 720 mm Main Blades 90 class tail blades and enlarge the tail boom,
I have a complete CNC chop to make this conversion,
I’m not shore if this is possible or not, or it will have some Adventist,
But if you thing is good idea, I will invest in the complete project,
And if this works perfect I will publish this in RR step by step.

Please give me you ideas and tips…
Watt do you thing???????????

10-12-2005 06:06 AM  13 years agoPost 2

rrElite Veteran


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I think this has already been done I believe there is a 50 - 90 conversion kit.

10-12-2005 06:23 AM  13 years agoPost 3
Santiago P


South West, Ohio

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Possible, yes. Cool thing to do, NOT AT ALL.
The stresses you will be putting the 50 sized frame, drivetrain, head and tail components will be way beyond what they are design to take.
To do it right, you would literally have to redo almost everything making it an impractical project.
If you just modify the drivetrain, and enlarge the boom to accomodate the longer blades, you would end up with a ticking time bomb.

May I suggest you try your talents to design your own CCPM frame mod (stacked alum or G10 frames), and an adjustable drivetrain to allow different gear ratios from the stock 8.5:1 to 9.2:1, and a longer tail to allocate up to 620mm blades. All this while keeping it a 50.

That, i think would be way cool.

10-12-2005 06:23 AM  13 years agoPost 4
V-22 Osprey


Sidney, Maine

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Its the Bigblock conversion kit. Do a search and you will find some good info.

10-12-2005 02:54 PM  13 years agoPost 5


Monterrey, Mexico

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TE MAMASTE!!!!!!!!!.

It’s better if you buy your 90 heli and keep a 50 as stock as possible. Just think about a crash ( my god!!!! heaven for bid). You would have to redo (CNC) the new parts form scratch. EXPENSIVE.

I'll suggest you follow Money Pit's advice. I think it would be way cooler to build a new class heli.

If you really want a 90 heli, ask Berny to sell you his. He's not using it anyway (and probably will never use it).

Any way.... that’s my money's worth

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