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03-30-2010 08:43 AM  10 years ago
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bluefronted

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Pretoria, South Africa

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Headspeed Voyager 50
Hi Guys,

I've started flying after 5 years and wanted to confirm the headspeeds for a Voyager 50 , with a 50 sxh engine and hatori pipe.

Currenly my gov is set for 3 speeds , Normal - 1650 , Idle 1 1750 , idle 2 - 1850rpm . I read somewhere that guys are setting up to 2000 rpm.

chow
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03-30-2010 11:05 AM  10 years ago
mdu6

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Montreal

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Unless you have change the default gear ratio (1:9,78) to something a bit lower, 1850 on a standard 50SXH is already pretty high.

18000/9,78 = 1840

17000/9,78 = 1738
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03-31-2010 06:24 AM  10 years ago
bluefronted

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Pretoria, South Africa

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Hi what are the 18 000 and 17 000 , engine rpm , why the two different values.

Thanks
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03-31-2010 11:22 AM  10 years ago
mdu6

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Montreal

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yes engine rpm

engine rpm / gear ratio = head rpm

I gave indication of approximate engine speeds you were running.

OS gives power rating at 17000, so this is probably close to
the optimal engine speed you should be targeting.

To lower the gear ratio you can :

go to 84T main gear and get 1:9.3
go to 10T pinion and get 1:8.8

or combine the 10T pinion and 84T main gear to get 1:8.4
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03-31-2010 12:15 PM  10 years ago
Spacey

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Pretoria, South Africa

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You can push it up a little more towards 2000 but yes you will be abusing your motor a little also. I'd shoot for around 1900RPM on the head, the heli will fly good there.
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