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Old Sep 13, 2001, 10:40 PM
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New M100 From Parkflyers.com??????

I bought one of the new M100s from parkflyers.com for 24.99. I was wondering about anyone else that has tried one of these. I plan on using it in a new scratch built P-51 built from 175% Rc Microflight plans. What props and batteries are you using? my Mustang only has about 80-85 sq. in. of wing area so I wanted to keep the weight between 10-12 ounces. Thanks in advance.


Stephen Ertel
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Old Sep 13, 2001, 11:01 PM
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That translates to a wing loading of around 17-20 oz./sq.ft. That's not going to be a slowflyer.


Jun Nolasco
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Old Sep 14, 2001, 09:28 AM
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I have three, love them. Use the prop that came with it and 8/300 Nimh batteries.
What you are building is not a plane, it is a bullet with wings.
Get the weight down too 7 or 8 oz.
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Old Sep 14, 2001, 10:57 AM
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Has anyone measured the current draw on the m100? Are 300mAh NiMH batteries really able to supply enough current?
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Old Sep 14, 2001, 11:37 AM
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Looks like about 3-3.5A with a 8x4 prop. I fly a direct drive 280 with the 270/300mah NiMH batteries. They will yield that kind of amperage, but don't expect long flight times at full throttle. The 720's are probably better if you can fit them in.
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Old Sep 14, 2001, 09:54 PM
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Hoppy, what size prop are you useing on that direct drive 280? How much does this plane weigh? And how much trust will it develope?
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Old Sep 15, 2001, 03:23 AM
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Actually I have no idea what the thing is going to weigh. Mustangs were really fast anyways. I was wondering about RRC's 300 NiMh because of the low weight but was wondering about the current draw. I'm planning on using 8 cells. Would the 720s be a better choice?
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Old Sep 15, 2001, 04:28 AM
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What do you think of getting a bb 5:1 gearbox and putting a 9x6 or 8x7 prop on it and using 8 720 NiMh? Can someone run these numbers through electricalc? If this thing's going to come out heavy I want lots of power and speed.
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Old Sep 15, 2001, 07:52 AM
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You have to be very careful chasing you tail for more power. The bottom line is power to weight ratio. With the prop that comes with the M-100 it has 7 oz of thrust and draws about 3.5 amps. The 300 NiMH batteries seem to hold up good the that amperage.
I tried different props and got 8 oz thrust but now I have to go to nicad batteries and the plane will weight 1 oz more. Where did I gain anything?? The stall speed will rise and I have less flying time. To me, I lost ground.
Set the motor up as efficient as you can and build the plane to fit. 7 oz thrust will fly a 8 or 9 oz plane very smartly. The Zagi equipment (SP400) will rip up the sky in a 12 oz plane. You can throw a lot of money at you motor and gain nothing. Beware of the 36 cell trap!
If you want performance out of electric, learn to build light or you will be beating your head against a brick wall, draining you pocket and still not catch your poor tail.
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Old Sep 15, 2001, 10:43 AM
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The biplane weighs 10 oz and has a 5x4.5" master prop on it. Battery packs are 270/300 mah with 8 cells. Thrust ?? I'm going to try the M100 with the hopes of increasing flight time with the 270mah packs.
hoppy

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Originally posted by foamman01
Hoppy, what size prop are you useing on that direct drive 280? How much does this plane weigh? And how much trust will it develope?
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