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JR-Spektrum . Gyro Hobbies . E-flite

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e-MS Composit Hornet > Can't get off ground... What size pinion?
 
 
helicopter34
Veteran
Location: New Jersey, exit 82

Well I finally got my hornet trimmed perfectly and the tail moving super smooth and holding well, but now that I up the throttle and pitch, it won't climb at all. I am currently using the 7 cell 600 maH battery that came with the kit, the stock ms motor, and a steel 11 tooth pinion. How do you calculate what toothed pinion you need. I used walts formula from some other post but it said I should be using a 9-10 toothed pinion. What battery would fit this pinion?
07-08-2003 Over year old.
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helicopter34
Veteran
Location: New Jersey, exit 82

Weight

The heli weights around 363 grams fully loaded plus 22 grams for the gear. Total practice flying weight 375.
07-08-2003 Over year old.
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Hoverup
Elite Veteran
Location: Gulf Coast

Go to the 9 or 10 tooth pinion as you suspected. A pack of two 1200mah E-tech LiPoly's will get you 15-18 minutes of flight time and help drop some of the weight you are carrying. You really need to be closer to 300g AUW.

Cheers - Boyd
AMA 80393
Major USAF
Retired
07-08-2003 Over year old.
 
 
helicopter34
Veteran
Location: New Jersey, exit 82

Why would the manual suggest a 12 toothed pinion. I have everything else exactly stock as the manual says.
07-08-2003 Over year old.
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corey11
Elite Veteran
Location: Bay Area, California

the cp hornet wont fly with a 7 cell battery..you need to lighten your heli..start taking of cases etc..
07-08-2003 Over year old.
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modtron
Veteran
Location: Oxford. UK

Why do you say it will not fly with a 7 cell battery. You must have some problems with yours. Ours is a fully standard CP with a 7 cell pack and the 12T pinion and it flys just fine.
07-11-2003 Over year old.
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e-MS Composit Hornet > Can't get off ground... What size pinion?
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