help picking out a motor for MOJO 40? using a123 setup..
04-22-2009 | 09:23 PM
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From: Lakewood,
CO
help picking out a motor for MOJO 40? using a123 setup..
Hey guys,
I have decided i want to go electric. the Mojo 40 is built, and it is ready to cover, now the powerhouse of this thing... i need help.
I am was planning to use a os 50sx with 8oz tank so total weight would be roughtly around...
14oz engine w/o muffler
8oz tank
2oz misc
Total of 24oz
A123 battery.. i need help deciding between 5s1p or 5s2p. the problem with the 2 parallel that it will be a bit on the heavy side.
I was going to do just 5s1p pack. But flight time is decrease significantly....
So what i need help is with the motor. i need something that will hold this plane up around half throttle with flight time at least of 6 min. it this possible?
the plane is around 4-4.5lbs ready to fly with a .46 engine.
I have decided i want to go electric. the Mojo 40 is built, and it is ready to cover, now the powerhouse of this thing... i need help.
I am was planning to use a os 50sx with 8oz tank so total weight would be roughtly around...
14oz engine w/o muffler
8oz tank
2oz misc
Total of 24oz
A123 battery.. i need help deciding between 5s1p or 5s2p. the problem with the 2 parallel that it will be a bit on the heavy side.
I was going to do just 5s1p pack. But flight time is decrease significantly....
So what i need help is with the motor. i need something that will hold this plane up around half throttle with flight time at least of 6 min. it this possible?
the plane is around 4-4.5lbs ready to fly with a .46 engine.
05-08-2009 | 01:10 PM
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From: Merced, Ca.,
CA
RE: help picking out a motor for MOJO 40? using a123 setup..
xoon:
That is a nice bird, have one YS 63 powered. Yes, keep it light as you reasonably can, they do tend to end up on the heavy side. I would go to AXI or hacker and pick a motor rated at least 200 watts per pound of airframe all up estimated finished weight. The AXI and Hacker numbers are reasonably close to reality. Have some bargin motor that work ok, just do not put out the claimed power, some less than 1/2. I would go to a 4 cell 30C battery for ease of location. Installing 2 cells on one side and three on the other may lead to problems. There is not much room on this bird between motor and leading edge of the wing, keep things ballanced as well as you can, will give you great elevators. Love to do elevators to a landing, but airframe must be light. ENJOY
That is a nice bird, have one YS 63 powered. Yes, keep it light as you reasonably can, they do tend to end up on the heavy side. I would go to AXI or hacker and pick a motor rated at least 200 watts per pound of airframe all up estimated finished weight. The AXI and Hacker numbers are reasonably close to reality. Have some bargin motor that work ok, just do not put out the claimed power, some less than 1/2. I would go to a 4 cell 30C battery for ease of location. Installing 2 cells on one side and three on the other may lead to problems. There is not much room on this bird between motor and leading edge of the wing, keep things ballanced as well as you can, will give you great elevators. Love to do elevators to a landing, but airframe must be light. ENJOY
