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Old Dec 11, 2012, 07:18 PM
FLY FOR FUN - GLIDE FOR LOVE
pablo pinto's Avatar
United States, FL, Miami
Joined Jan 2011
51 Posts
Question
Motor Hacker

Hi, receive a Hacker brushless motor B40 11S + MAXON 4,4:1 Keramik but i don{t know nothing about motors with gearboxes and i would like to know what size of propeller i can use and for what Weight of glider i can used , can any body help me please ?

Thank you for your information.
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Old Dec 12, 2012, 07:59 AM
Registered User
Bremen/Germany
Joined Apr 2004
468 Posts
Hi Pablo,

have a look on the Hacker webpage (which has an English version )

http://www.hacker-motor-shop.com/e-v...&c=2098&p=2098

I checked the data with a motor calculation program www.drivecalc.de and it looks like that you would prefer 3 s-Lipos. Two typical data sets at 10,5 Volts assumed supply:

13" x 6.5" Aeronaut prop, 32 Amps, 338 Watt
13" x 7" dto., 40 Amps, 427 Watt

Ideas of required power for glider use differ (don`t they SteveR )) ) but experience tells that 100 W per Kilogramm (approx. 2.2 lbs) yield a safe climb at about 3-4 m/sec, whereas approx. 140 W/kg gives you 6+ m/sec.

Take your choice

Herbert
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