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Forum: Pattern aircraft

12-11-2014, 02:25 AM

Replies: 32

power system for 1978 duallist opinions?

Views: 8,889

Posted By kyleservicetech

I've been flying that TwinStar model with a pair...

I've been flying that TwinStar model with a pair of 600 Watt Hyperion motors up front. These motors are running at 450 Watts, turning their 10X7 APC-E props at 10,800 RPM.

After the maiden...

Forum: Pattern aircraft

12-10-2014, 06:25 AM

Replies: 32

power system for 1978 duallist opinions?

Views: 8,889

Posted By kyleservicetech

Out of curiosity, can those gasoline engines with...

Out of curiosity, can those gasoline engines with reed valves run in reverse, assuming the crankshaft timing can be changed accordingly?

Forum: Pattern aircraft

12-09-2014, 12:43 AM

Replies: 32

power system for 1978 duallist opinions?

Views: 8,889

Posted By kyleservicetech

What are you using for the counter rotating props...

What are you using for the counter rotating props at 110 Watts per Pound?

I'm looking for a pair of 10X7 electric props, one forward, one reversed.

Forum: Pattern aircraft

12-06-2014, 05:13 AM

Replies: 32

power system for 1978 duallist opinions?

Views: 8,889

Posted By kyleservicetech

I just ran the numbers on your 4S LiPo pack and...

I just ran the numbers on your 4S LiPo pack and model in www.motocalc.com. Motocalc predicts a total of around 43 Amps and 600 Watts for each of your motors, a safe value for the motors them selves....

Forum: Pattern aircraft

12-06-2014, 02:04 AM

Replies: 32

power system for 1978 duallist opinions?

Views: 8,889

Posted By kyleservicetech

Assuming proper propeller diameter, pitch and...

Assuming proper propeller diameter, pitch and RPM, that 160 Watts per pound should just about fly your model straight up.

But with the wrong (way way wrong) diameter, pitch, and RPM, your model...

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