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Old Oct 12, 2013, 08:44 PM
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Suggested Motor for A Sig T-Clips

Need some help trying to pick out a motor and gearbox for my Sig T-Clips.

The recommended motor is an E-flite .32 or .40.

Our goal is to fly the airplane using a 4s 5000 mAH battery for 30 minutes at a time with maybe at least 10 minutes of spare flight time left on the battery.

We'll have a separate battery powering the servos and Rx so the main battery will only be powering the motor.

What motor and gear box would be best for that?

Thanks,

Frank
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Old Oct 12, 2013, 09:12 PM
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Gearbox? Really?
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Old Oct 12, 2013, 09:18 PM
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Gearbox? Really?
I think that may be the best way to go to get the most flight time out of the battery.

A geared setup seemed to work well for my indoor planes so it may just translate over in a larger scale.

Frank
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Old Oct 12, 2013, 09:26 PM
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I'm not sure you will get much more time if any using a gearbox. How big a prop can you spin?
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Old Oct 13, 2013, 09:34 AM
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I/m sure the T-Clips' landing gear height can support an 14" prop. I've seen mention of some folks using that size.

And I saw this note:

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Originally Posted by Tom B 1956 View Post
The clearance for your choice of prop. You have about 8.5 to 9 in clearance from level from prop nut to the ground.

Tom B.
Frank
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Old Oct 16, 2013, 04:33 PM
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Finally got my rear gear on.

Frank
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Old Oct 17, 2013, 12:57 PM
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A 1907/2Y on your 4S battery would work well with a 10/8 or 10/9 prop---about 350 watts at full power.

A light weight geared option would be a 1107/2Y/6.7 with a 16/12 prop--about the same power level but better prop efficiency with the large prop.

The key item is to figure out the cruise power required......

Steve
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Old Oct 17, 2013, 05:35 PM
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Thanks for the recommendations Steve!

How can I help answer your question? The key for this airplane is flight duration since the battery is the limiting factor. I suspect top speed requirements will be 55 mph since we'll be traveling back roads.

Does that help any?

Thanks,

Frank
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Old Oct 22, 2013, 11:39 AM
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I usually go for the more exotic setups--my choice would be the 1107/2Y/6.7 with the big prop.

steve
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Old Oct 23, 2013, 06:42 AM
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I usually go for the more exotic setups--my choice would be the 1107/2Y/6.7 with the big prop.

steve
Copy that Steve and thanks for the the info. It doesn't look like we'll be able to use the Sig T-Clips, but I am sure this motor will be applicable to plane we finally decide on using.

Thanks again,

Frank
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Old Oct 23, 2013, 09:13 AM
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I'm not sure you will get much more time if any using a gearbox. How big a prop can you spin?
The gear box on it's own is not going to give longer flights----but it can allow the use of much larger props with high pitch which can give much better prop efficiency---leading to more flight time and speed.

Steve
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Old Oct 23, 2013, 09:14 AM
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Copy that Steve and thanks for the the info. It doesn't look like we'll be able to use the Sig T-Clips, but I am sure this motor will be applicable to plane we finally decide on using.

Thanks again,

Frank
Why not?

Steve
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Old Oct 23, 2013, 09:19 PM
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Why not?

Steve
The fuselage compartment is not big enough to hold the Rx battery and the Scorpion backup battery. The fuselage is very short, and does not allow much room for things like that. I didn't realize this until I bought one for myself to do the testing with. It does have a cool slide in battery tray design, but without cutting the covering and building a tray underneath the servo tray, those two batteries will not fit. I know it wouldn't be hard to do, but I'd prefer to find a plane we could use that would be stock, right off the shelf.

If we did use the T-Clips and modified it, there will be folks that would say we couldn't have done this without modifying the airplane. I need to see what else Sig has to offer in the ~ 5 lb range that will work for us.

Frank
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Old Oct 26, 2013, 10:23 AM
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This hobby is about making things work and the learning experience that goes along with it. Nobody frowned on Maynard Hill when he flew across the Atlantic because it wasn't ARF. Anyone with enough effort could duplicate his efforts.

Greg
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Old Oct 31, 2013, 07:55 AM
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The fuselage compartment is not big enough to hold the Rx battery and the Scorpion backup battery. The fuselage is very short, and does not allow much room for things like that. I didn't realize this until I bought one for myself to do the testing with. Frank
Frank this is what you want....

http://www.horizonhobby.com/products...basic-EFL10450

The Carbon Cub from Horizon....

Here is why:
  • Large easy to see
  • Easy to fly
  • Flaps for slow down
  • Large tires for those less than desirable landing zones
  • Super easy to repair
  • Rugged
  • Room for 6s 5000 pack should easily get you the time needed

I think it would be awesome....for this purpose.

Mike
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