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E-Flight Park 400 4200kv Inrunner - What to use it in?

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E-Flight Park 400 4200kv Inrunner - What to use it in?

Old 09-08-2007, 08:53 PM
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Moonwalker
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Default E-Flight Park 400 4200kv Inrunner - What to use it in?

I have the above motor in a P-47 Warbird. I have never flown 3D but want to try it. What would be a good plane to get so I can re-use the Park 400 4200kv Inrunner???

Thanks.
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Old 10-30-2007, 03:58 AM
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rick88ss
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get a cobri or himax gear box for easier mounting and flexability. You can use it most Hyperion 10e size airplanes. Just about any airplane ~ 20-35 oz. and a wingspan of 30-40". It depends what type of flying you wanna do. That motor is capable of about 40oz of thrust with a 12x6 prop and a 6.6:1 reduction gear.
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Old 10-30-2007, 01:19 PM
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crash_out
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I had one (burned up....) geared 6.6:1(commonly known as the GWS "D" gear) swinging a 12x6 prop. Currently I have 2 geared Himax 2025-4200, which are almost identical. You'll want at least a 20 amp esc, I would go with a 25 for a margin of safety, and a 3s lithium battery capable of holding good voltage at that current.

For good 3-D performance, you're not going to want anything much over 25 oz total wieght. The Fliton mini-series planes are good choices, as are the Hyperion 10e planes. Most of the newer ~41 inch wingspan planes are going to be a little heavy for the setup.

As far as gearboxes go, I'd go with the Cobri unit. I've stripped at least 4 spur gears in the Himax units in what I consider a very short period of time.

Hope this helps!
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Old 10-30-2007, 10:05 PM
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What are the Cobri spur gears made of? How did you mess up the Himax spur gears? Was it while the plane was flying or having the prop hit the ground when landing with the power on?
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Old 10-30-2007, 11:58 PM
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Kosh
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I have stripped a NUMBER of Himax gears by simply applying power too fast and stripping the teeth off. I'm beginning to think that direct sunlight over time weakens them for some reason but its just a theory.
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Old 10-31-2007, 12:19 AM
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They were in an E-flite mini Funtna and mini Edge. There wasn't any abuse, simply general flying. I don't know what they are made of, but I have a Cobri gearbox and never had a problem. Even the stick GWS and E-flite gearboxes seem to be tougher.

Model Electronics Corp (MEC) has a new mini gearbox for 20mm motors. I've got a couple of their Superboxes and all have performed beautifully.
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Old 10-31-2007, 02:00 AM
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Originally Posted by crash_out View Post
They were in an E-flite mini Funtna and mini Edge. There wasn't any abuse, simply general flying. I don't know what they are made of, but I have a Cobri gearbox and never had a problem. Even the stick GWS and E-flite gearboxes seem to be tougher.

Model Electronics Corp (MEC) has a new mini gearbox for 20mm motors. I've got a couple of their Superboxes and all have performed beautifully.
Just remember that a MiniBox is super strong etc, but it does weigh a hefty 1.8oz (51g)... a Cobri is <20g. Unless you are putting >400W watts though it, I'd say a Cobri is enough.
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Old 10-31-2007, 01:19 PM
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Oh, I thought they had a smaller one made for 20mm motors. My bad.

I think the Cobri is the way to go. If you want to cheap out, I'd just get an E-flite gearbox/pinion without the 370 motor. The Park 400 will go right in.
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