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Is this a .46 electric motor..power wise?

Old 12-03-2008, 05:05 AM
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Deathawk
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Default Is this a .46 electric motor..power wise?

Hello...I recently bought from Grayson Hobbies a motor and esc...............
Im new to electrics and to look at specs and size to me matches a e-flite .25 but is supposed to be a .46..i do not want to crash again being underpowered..will a electric guru look at these specs compare and Please give me your suggestions.......
http://www.graysonhobby.com/catalog/...=404...grayson specs on motor......these are specs for Grayson motor
http://www.e-fliterc.com/Products/De...odID=EFLM4025A e-flite .25 specs..

look about the same here but i am no expert..or has anybody used this Grayson motor?..
i attempt my first multi=engine ASM C-130 and want to make sure it has plenty power..
Thankz in advance for any info...
Old 12-03-2008, 08:02 AM
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bassmanh
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Default RE: Is this a .46 electric motor..power wise?

hi,

EDIT = i didnt see it was for a multi engine at first but still need the weight and so on.

what airplane are you planning to put this in ? IE size weight wing span and so on ?

that motor only has a max of 550 watts (and you don't want to run it at max continuously) and for good sport flying you want about 75 to 100 watts per pound of airplane so for that motor i wouldn't go over about a 4 lb or so airplane.


let us know what the specs are for your plane and what kind it is then we can help more.




bassman
Old 12-03-2008, 12:19 PM
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DaveFlynn
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Default RE: Is this a .46 electric motor..power wise?

4 of those would be OK for the C-130. That would be 2000 watts. You will need a BIG 4 cell pack 8000 mAH minimum. Personally I would look for a motor about that size with a lower Kv, in the 600 to 700 range and use 6 cells. This would get the current down and allow you to use 14AWG wire instead of the heavier 12 gage and 30 amp ESC's, like the CC HV-30.
Old 12-03-2008, 03:48 PM
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Dr Kiwi
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Default RE: Is this a .46 electric motor..power wise?

Rule of thumb conversion for IC to electric is: multiply cubic inches by 2000 = watts - thus a true .46 should equate to about 900W.

The E-flite Power 46 is rated at 800W.
Old 12-03-2008, 04:37 PM
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Deathawk
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Default RE: Is this a .46 electric motor..power wise?

Thankz for all the info..i believe as you do this is more the line of a .25..and as some stated should fly this model is correct but i want way too much power and i also agree this is NOT a .46 motor..Thankz to all who answered this thread..great flying to all
Old 12-03-2008, 06:09 PM
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DaveFlynn
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Default RE: Is this a .46 electric motor..power wise?

A hot .46 can get to 1300 watts (about 1.8 HP) in flight. An Axi 4130 will go head to head with any .46 and some weaker .60's. The motor does turn at a lower RPM, so increasing the pitch is required. The Axi 4130 with an APC 12x6 and a 9S pack keeps pace with a .46 glow engine turning an APC 12x4. The motor has a little more thrust on the ground, but the glow engine turns about 4000 more RPM in the air.

If you went with 4120 size motors and 45 amp ESC's, about 3200 watts, you would not have to worry about cargo weight. You could use a 9S4P 12.8 Ah (4 x 3200mAh) pack and have nice long flights.

The smaller 550 watt motors should be fine though. It's a cargo plane and that's more than 100 watts per pound. But, if you can afford $1000+ for batteries go for it.

I'd like to see pictures when you get it done.

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