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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Predator Carbon Gasser????
04-02-2005 06:20 PM  13 years agoPost 1
stevengerrard

rrVeteran

Wigan NW of England

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just wanting to no what the gear ratio on the Carbon Gasser is.....


it is running a Hanson G26 engine....

we are trying to work out what head speed to run and what the engine speed is......

thanks


Steven Gerrard

CarbonXtreme
AvantRC
V Blades
Magnum Fuel
Align
Spektrum
Thunder Power

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04-02-2005 06:26 PM  13 years agoPost 2
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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well, well........
depends on where you got it from, and when.

Stock ratio is 6.28, that being a 14 tooth pinion, 88 tooth main gear.

I would think optimum ratio for that combo on 720 main blades would be a 13 tooth pinion, 88 main gear giving 6.76 ratio.

James

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04-02-2005 06:57 PM  13 years agoPost 3
stevengerrard

rrVeteran

Wigan NW of England

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ok thanks


his kit came with 700 blades not 720's...

what is the peak power revs????


regards

steven

CarbonXtreme
AvantRC
V Blades
Magnum Fuel
Align
Spektrum
Thunder Power

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04-02-2005 07:49 PM  13 years agoPost 4
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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personally
I would run it at 1850 RPM headspeed up to 2000 headspeed with the 700's on 6.28 ratio.

Let me know how that works for your taste.

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04-02-2005 07:59 PM  13 years agoPost 5
stevengerrard

rrVeteran

Wigan NW of England

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thanks agian


today we ran it at 1750 so the engine was at 10990rpm.....
it sounded sweet.....

at 1850 the engine will be 11618rpm

and at 2000 the engine at 12560rpm......

will just have to find were the engines peak power band is and get the head speed correct....


thanks

Steven

CarbonXtreme
AvantRC
V Blades
Magnum Fuel
Align
Spektrum
Thunder Power

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04-03-2005 12:42 AM  13 years agoPost 6
AGRAV8

rrProfessor

Mosquito Coast......Houston Texas

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I told you where?
run the 1850-2000.

I'm not guessing, this is a tested configuration and it works well with what you have.

James

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04-03-2005 07:33 AM  13 years agoPost 7
MrDHEJ

rrVeteran

Taylorsville, Kentucky, USA

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I'm running the 13/88 combo, 6.77 ratio, at 1750 1950 and 2000 with 720 rotortechs. the hanson 26 pro seems to like 13,500, though it might even like it higher.

Never go full retard!

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HelicopterCentury Radikal G20-30 N640 Hawk Predator › Predator Carbon Gasser????
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