Power plant - micro Bee
10-30-2003, 01:30 PM
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Power plant - micro Bee
Hi again!
Well, the micro-Bee is moving along and taking shape, and I need to start thinking about the flight pack mechanics and such...
I'm pretty well settled on the RFFS-100 model, with remote actuators (I just don't care for the way they look imbedded in the surfaces).
The motor was a mystery until I went to the data page on eflightdesigns.com. I tried to do my own homework, but I'd appreciate another pair of eyes or so:
I estimate the finished ready-to-fly weight at 40g (1.41 oz).
The wing is 21 in^2, making the wing loading 9.6 oz/ft^2.
At 0.088 pound, desiring 60W/pound, I'm shooting for around 5 Watts (by the way, do these formulae even apply at these scales?)
Using that number, I'm looking at a KMF-M20LV; the motor is the M-20 Low-Voltage, with 4.2:1 gearing, turning a GWS 4.4 prop.
How'd I do? Does that sound close? I'd appreciate your thoughts... I was mulling over micro servos, but I think the weight and space will dictate I use the actuators.
I've attached a couple of pictures.
Thanks,
Dan.
Well, the micro-Bee is moving along and taking shape, and I need to start thinking about the flight pack mechanics and such...
I'm pretty well settled on the RFFS-100 model, with remote actuators (I just don't care for the way they look imbedded in the surfaces).
The motor was a mystery until I went to the data page on eflightdesigns.com. I tried to do my own homework, but I'd appreciate another pair of eyes or so:
I estimate the finished ready-to-fly weight at 40g (1.41 oz).
The wing is 21 in^2, making the wing loading 9.6 oz/ft^2.
At 0.088 pound, desiring 60W/pound, I'm shooting for around 5 Watts (by the way, do these formulae even apply at these scales?)
Using that number, I'm looking at a KMF-M20LV; the motor is the M-20 Low-Voltage, with 4.2:1 gearing, turning a GWS 4.4 prop.
How'd I do? Does that sound close? I'd appreciate your thoughts... I was mulling over micro servos, but I think the weight and space will dictate I use the actuators.
I've attached a couple of pictures.
Thanks,
Dan.
