I haven't looked carefully at the specs, but if the 1000 and 900 in the name refer to kV's then they are a little on the high side for 4s--especially the 1000 kV.

As you probably know, I routinely fly my Nobler and Vector on 4s2100mAH packs (FMA in this case).

Guys,

Looking at other motor choices I think the AXI 2814/20 (840kV) @ 3.75oz on the 4S1P 2100 TP Pro lite V2 (6.7oz) might be a good candidate, thinking a 10 1/2 x6 prop say 8500 rpm?

Best,              DennisT

Guys,

Looking at other motor choices I think the AXI 2814/20 (840kV) @ 3.75oz on the 4S1P 2100 TP Pro lite V2 (6.7oz) might be a good candidate, thinking a 10 1/2 x6 prop say 8500 rpm?

Best,              DennisT

Or Scorpion 3014-830. I would make it to let me slide the battery as far forward as possible. I guess your particular version is prone to tailheaviness, but I would have thought that since the original was built to handle a muffler-less Fox35 and an empty 4oz tank, your weights would be fine.

But I haven't flown a Smoothie (any version) at all.

I agree wtih Dean.  If you are going with the 4.5 pitch prop and a 4S set up then a KV od 1000 would work too.

Dennis, I think you are going to overload that motor, it is rated to 1/2 of the 2826 and it is good size for 12x6 half the power will need prop 10x6 ... it will be better to use 2820/14 ... but I think you will end up at APC11x5.5 and it will need up to 10 000rpm and it will need 2820/12 ... just by eye :-)

I have two of them with about 40 flights on one and 9 on the second and they are both fine, except for the connector problem (see "Turnigy alert" thread). So far there has been no connector problem with the low-time one.

Turnigy motors are smooth running and seem to pull fine. A good bargain for the price, especially from Hobby King.

I've never flown a high-buck motor, so I might change my tune if I had the experience. All of the motors I've used, Rimfire, Turnigy and E-flite have been smooth and in-balance to the degree that prop vibration is a bigger component of the overall buzz than the bare motor vibration.

So far, no issues with stress on the motor in hard maneuvers. I would note, that the motors I have all have two bearings at the prop shaft end -- opposite the stator end. If you turn the motor around and mount the prop on the stator end of the motor, you just have one bearing carrying the loads.

John