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Mar 30, 2006, 01:44 PM
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BP-12 Delta use in a pusher jet


Anyone fly this motor in a pusher jet? If so what prop, plane AUW? How do you like it?
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Mar 30, 2006, 04:02 PM
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dottney's Avatar
I've got one in a T38 Parkjet using a 3S Maxamp 1500 or Vampower 1700 pack with a GWS EP 8x6 prop. All up weight is 16oz. Flight performance is stellar. Very fast and smooth.
A buddy is flying is OV10 Bronco on 2 BP12's (Towerpro, or whatever youwant to call them today). This plane comes in at something like 34oz or a bit more, I can't remember. He's using 3s packs and I think 9x4 or 9x6 props.
Hope this helps
Mar 30, 2006, 11:26 PM
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Hi Dave, I maidened my F-5 today w/ BP-21 & GWS 8x3.8" prop & it was not very stellar to say the least. Do you think it would fly better w/ the BP-12?

Best regards,
Dale
Mar 31, 2006, 09:37 AM
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dottney's Avatar
Try a GWS 8x4 HD prop with the 21 motor first. I'm assuming you're using a 3S lipo pack capable of delivering up to 15A.
Dave
Apr 01, 2006, 10:09 AM
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Thanks Dave, today I'll give it another try. 3S 1250mah 8C. My Watts Up meter gave the following #'s:

GWS 8x3.8, 11.56v, 67w, 5.6a
GWS 8x6, 10.88v, 74w, 6.7a
Apr 01, 2006, 04:08 PM
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dottney's Avatar
Dale,
I think your battery pack might not be up to snuff. The 8x4 on the 21 motor with a 3S pack should pull about 13-14A. Your 1250 8C pack can't safely put out that much amperage.
Dave


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