Motor RPM
#1
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Location: Billiat, FRANCE
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Hi all,
i'm new there, ai just register today. 2 months ago i bought an LMH-120.
Now it is ready to Fly, But i think i got a lightly problem with the motor. In fact the heli hover without a lot of gaz, i would like to have more rpm to my rotor, before the heli can start to fly.
Does anybody could tell me more about the things that i have to do?
i fly with this configuration :
- 3 Nanos Multiplex
- Graupner Speed500 race
- Jeti advance 30A
- 2200 3s 15C Lipo
my pinion gear is a 9 tooth one.
thanx by advance for your answers and sorry for my english, i'm from france [
]
i'm new there, ai just register today. 2 months ago i bought an LMH-120.
Now it is ready to Fly, But i think i got a lightly problem with the motor. In fact the heli hover without a lot of gaz, i would like to have more rpm to my rotor, before the heli can start to fly.
Does anybody could tell me more about the things that i have to do?
i fly with this configuration :
- 3 Nanos Multiplex
- Graupner Speed500 race
- Jeti advance 30A
- 2200 3s 15C Lipo
my pinion gear is a 9 tooth one.
thanx by advance for your answers and sorry for my english, i'm from france [

#2
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Hi
Yep, lipos will do that.
Buy some smaller blade grips. The stock one comes with one 4 dot grip and one 6 dot grip. This measures out to 5 inches of pitch. Using two 4 dots will give 4 inches of pitch. Using a 2 dot and 4 dot will give you 3 inches of pitch. I recomend going with a 2 inch or 3 inch pitch setup. I hope this makes sence.
Remember, lowering the blade grips will increase the blade rpm (thus increasing stability) and reduce your climb out at power.
Yep, lipos will do that.
Buy some smaller blade grips. The stock one comes with one 4 dot grip and one 6 dot grip. This measures out to 5 inches of pitch. Using two 4 dots will give 4 inches of pitch. Using a 2 dot and 4 dot will give you 3 inches of pitch. I recomend going with a 2 inch or 3 inch pitch setup. I hope this makes sence.
Remember, lowering the blade grips will increase the blade rpm (thus increasing stability) and reduce your climb out at power.
#4
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The simple answer is your heli is too light. The heli is designed for SC cells, not for lipo's.
If you have the possibility too ad ( sinfull ) weight, like double your batteries it would be better.
An extra advantage of higher rpm, is a fast spinning tail. better with HH gyro's.
i fly 4&2 dot grips with 7GP3300 SC cells +-1350Gr auw.
TM
Greeting from Belgium
If you have the possibility too ad ( sinfull ) weight, like double your batteries it would be better.
An extra advantage of higher rpm, is a fast spinning tail. better with HH gyro's.
i fly 4&2 dot grips with 7GP3300 SC cells +-1350Gr auw.
TM
Greeting from Belgium
#6
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hi all i resolve my problem.
I put some more weight (1.2 kg instead of 0.980kg) with 2x2° grips.
now it flys good.
thanx for all for your help.
I put some more weight (1.2 kg instead of 0.980kg) with 2x2° grips.
now it flys good.
thanx for all for your help.
#8
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think it wil works with this with some less weight, or with some more RPM.
it will also increase the stability of the corona.
may be i'll try one day
it will also increase the stability of the corona.
may be i'll try one day
#9
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You could also try the shorter blades. I use the shorter blades. No added weight, higher rotor RPMs, less load on the motor. I am using the 2 dot blade grips.