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Century Radikal E640 - Swift 16 NX
› V3 motor question..
12-01-2005 02:00 AM  12 years agoPost 1
Betofazzo

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Venezuela

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I need to verify this.: if a change the main motor pinion to 11 tooth of my hummer v3 (10 tooth original), i get more head speed right?, a litle more stable fly, and responsive to trothle... but decrease time fliying?.. i want to upgrade to carbon main blades for fast foward fly.. is any good..thanks

Pd: i use lipo batt thp 1320 2 cell.

Finally I have a Turbine heli.. :) Mobb Powercat !!

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12-01-2005 11:16 AM  12 years agoPost 2
coolice

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Northamptonshire, England

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Hey,

Yes, in theory you will get more head speed by raising the tooth count on the pinion, but on a Fixed Pitch helicopter this may not help you so much.
Reason being you will then only be flying with less throttle to maintain a hover, as the head speed is higher you will not need so much to hover. Hence you will still be around the same speeds.

What you really need to do, if you want to raise the head speed for increased stability and control power, is to shorten the main blades a bit.
This was a trick used by the Piccolo boys and indeed still is used on a model called the Gnat / Moth, which is basically a shortened Piccolo.

By shortening the main baldes you will raise the head speed required to hover, thus increasing the stability and control power.
Perhaps combine this with the pinion change to compensate for the shorter blades?

What I do on my V3 to get a little more head speed is remove pitch from the blades by twisting them downwards. Like what you do to track the blades, only I take pitch off them.
Obviously not to much or the model will not take off, just a small twist.

Also, going up in tooth count will not make the throttle seem anymore responsive, if anything I would say it would be a little slower.
Like a car, lower gearing spins up quicker than higher.
Think of it as pulling away from traffic lights in second gear, the engine will bog down under more load. Stick it in first and you'll move away faster.

It is the same with RC Buggys, higher gearing for better overall top speed. Lower gearing for short, twisting race tracks where speed out of the corners is best.
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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12-01-2005 05:08 PM  12 years agoPost 3
Betofazzo

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Venezuela

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V3 More head speed..

Thank you Sr. for the reply and the tips, i probably cut a litle the blades and try ok... this morning i test the carbon blades and love it, the heli become easy to manouver and have less pich up effect in foward fly., but i think they are less resistant to crash. hope understand my bad english..bye

Finally I have a Turbine heli.. :) Mobb Powercat !!

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12-01-2005 05:23 PM  12 years agoPost 4
coolice

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Northamptonshire, England

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Hey,

Your welcome, glad to help.

The carbon blades do make a real difference to the way the machine flies, I think it's through their greater rigidity and possibly better weight distribrution to.
Also in any mishaps they do survive better due to their better strength, from experience flying with another machine using the carbon mains, they destroy normal Hummers quicker to when you fly into them
.

Ian Contessa
Team Robbe SchluterUK
Midland Helicopters

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