scale rotor head - 450 size blade grips - RC Groups
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Jan 12, 2009, 12:02 PM
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scale rotor head - 450 size blade grips


I'm trying to make a low cost multiblade head for my Twinn Rexx and I just came across the vario 3 blade tail rotor hub with 5mm bore and I was thinking I could use it as a main rotor.

Looking at the dimensions of the components it looks like the standard 450 blade grips have no chance of fitting on as it uses 8 O.D. bearings and the hub requires bearings with 6mm I.D. and there's no such thing as 6x8x... ball bearings.

So, I'm after some 450 size blade grips that will fit 6x10x... ball bearings or any other blade grip that will fit 450 size blades in with spacers. Anyone know where I can get these?

Here's the link to the tail rotor

p.s. sorry for the double post. I posted in "multi rotor heli" forum by accident. Maybe the moderators can delete my other post?
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Jan 12, 2009, 12:07 PM
RC4Life not just 4 xmas
p4ddy's Avatar
Why not just get the Align 3 blade head? got to be a lot cheaper than anything from Vario.
Jan 12, 2009, 12:28 PM
Registered User
I think you're right there, Paddy, I forgot I would need a swashplate aswell and that would drive up the cost.
Jan 12, 2009, 02:55 PM
RCHN #150
Rickn816's Avatar
Originally Posted by j_js1
I think you're right there, Paddy, I forgot I would need a swashplate aswell and that would drive up the cost.
Yes. You need the swash. Multi-blade heads are not inexpensive.

Jan 12, 2009, 06:11 PM
Registered User
Lightning Heli and Heliartist make reasonably priced multiblade heads.
Jan 12, 2009, 10:46 PM
Registered User
Yup! Get the HeliArtist 3 bladed head for your TwinnRexx instead. They come with swash plate follower and the swash plate. Get the HeliArtist 3 bladed instead (The Lightning...don't really like it as compare to HeliArtist)

Jan 13, 2009, 06:16 AM
Registered User
Thanks for the replies

Think I'll get the heliartist one - flying-hobby doesn't seem to have it instock

They do have the 4 blade one instock though! Are there any tandems that run 4 blade rotors in real life?
Last edited by j_js1; Jan 13, 2009 at 06:45 AM.
Jan 13, 2009, 07:44 AM
Registered User
Yes... there do exist 4 bladed tandem heli. I saw it somewhere that I think it is a prototype of Chinook with 4 bladed per head.

Jan 13, 2009, 07:58 AM
Registered User
Ah! Found it.
It is "Boeing-Vertol 347"
Jan 14, 2009, 05:04 AM
Registered User
Thanks SH

Not too sure about putting the wing on while flying though.

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