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AP and Scale Discussions for Scale, Multi-blade and AP applications using CSM Cyclock, Helitronix Multi-mixer, Spartan AP2000i, Firmtronix, Digimix-3.


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Old 05-18-2008, 06:56 AM   #1 (permalink)
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Default RC Expert Multi blade heads

Saw some 3/4/5 blade heads for the T-Rex 450 at Heli Direct. Does anybody have any advice on these units. I would like to try a 3 and a 5 for my 450's but dont know much abouit 'em. Any feedback would be much appreciated.

Thanx to all.
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Old 06-03-2008, 05:24 AM   #2 (permalink)
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Quote:
Originally Posted by 22charlie View Post
Saw some 3/4/5 blade heads for the T-Rex 450 at Heli Direct. Does anybody have any advice on these units. I would like to try a 3 and a 5 for my 450's but dont know much abouit 'em. Any feedback would be much appreciated.

Thanx to all.

Stay away from them, all they want is your money, they don't have any stock at the moment.
That's what I heard on other threads.
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Old 04-25-2009, 08:51 PM   #3 (permalink)
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I have HeliArtist ones, they are pretty bad. I've heard from friends who use the Lightning ones and they say that they are even worse.

I ended up using parts from various places to make my 4- and 5-Rotor Heads:

- Hub and Blade Holders = HeliArtist (no choice unless I custom mill one)
- Swash = Beam (need to tap M2 holes in the right places)
- Follower = Beam + TREX parts
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Old 11-16-2011, 05:20 PM   #4 (permalink)
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Go with the CopterX ones. Nice quality and cheap
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Old 10-01-2012, 02:29 PM   #5 (permalink)
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Ughhh Ive had a lot of tail authority issues with a 5 bladed head .

Some things about tail authority:

Scenario 1- Keep the same 2 main blade head speed, and get more pitch on tail, it will do fine.

Scenario 2- Lower your head speed since you have 5 blades, you tail will lose tail authority, so add a bigger tail blade, I used hand cut versions of the blade MCPX main blades.

Scenario 3- Swap out the 3mm tail shaft, and put in a longer one, and add an additional blade assembly so you get a cascaded tail with 4 blades swinging.

Scenario 3 gives you best tail authority, at high or low head speeds.

Scenario 2 is simple and does its job if your okay with it not doing 3D hahaa

Scenario 1 is not feasible unless you have shorter main blades. Downgrading for stock 325 or to less than 300mm. And the main point here is lighter blades equals less torque for the tail to counter.

What works for you? Me I used scenario 3 because I found that the lower head speed sounded better with 5 blades, and could be used for scale helis that require cascaded tail.
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