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Weight and motor/power question

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Old 02-28-2010, 10:49 AM
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tph1
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Default Weight and motor/power question

I have a 6.72 lb. Inspire 60. I have a Hacker A50-16S with 6C power. Is that enough or too much? I don't fly 3D (yet), I'm using it as a kinda remedial trainer/sportsman pattern trainer.
Is there a weight to power formula or outline that is commonly used?
thanks, T
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Old 02-28-2010, 12:02 PM
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Default RE: Weight and motor/power question

You should not be short of power for sure. It should also be enough to 3D. Have a look at the SebArt planes in the 50 size class, see how much authority the motor has on those planes. They are slightly lighter than the Inspire.
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Old 02-28-2010, 12:32 PM
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Default RE: Weight and motor/power question

yes I did, I took this power recommendation off the Esprit sight before they took down their Fliton stuff. I can fly the sportsman pattern on 1/2 to 2/3 throttle. I may end up getting a Sebart AngelS 50 or something similar later to put this set up on.
I'm thinking this set up can fly something in the 8lb range in lower classes of pattern.
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Old 02-28-2010, 09:48 PM
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Default RE: Weight and motor/power question

The AngelS is a lovely plane to fly. Anyways, 6S for an 8 lbs plane is not really appealing as a 6S system kicks out about 9 lbs of thrust, on windy days you may suffer on your uplines.
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Old 03-01-2010, 08:05 AM
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Default RE: Weight and motor/power question

you're probably correct, I may need 8S to fly 8#'s
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Old 03-01-2010, 10:15 AM
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Default RE: Weight and motor/power question

10S! Hehehehehee ... I used the Scorpion 4035-250 on my WindS 110 ... lovely!
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Old 03-01-2010, 11:50 AM
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Default RE: Weight and motor/power question

I saw the thread on the Wind 110 and it looks like a sweet plane. I am trying to decide on my next plane. I am torn between build a 110 size or going ahead and doing a full 2m. What do you think?
How much difference is there in the power requirements?
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Old 03-01-2010, 12:00 PM
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Default RE: Weight and motor/power question

110 or 2M ... cost difference is not that much ... the 110 uses a slightly less powerful motor but you need an 80A ESC so might as well go with a CC85 once and for all. I am flying mine on 10S so batts make no difference. Then comes servos etc, its about the same if you are a serious pilot. Only difference is the cost of the plane I guess. The Extreme Flight 2M Vanquish, they have an EP version too I think, is rumoured to be no more than USD700, maybe as low as USD650 too. That would be a sweet buy when it hits the market.

There are not many cheap EP 2M patternships out there. The Fliton 2M is nicely manufactured, I had my hands on one but it was overweight, that happened because the first few had somehow been built using heavier ply, it was a mistake I was informed. So if you can find one that is light then she is a nice plane but mods are needed for EP on the motor mounting department.

I went for the WindS 110 because its easy to transport still and I am just a non competitive hobbyist.
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Old 03-01-2010, 12:42 PM
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Default RE: Weight and motor/power question

I want to get back into contest flying eventually so I may go for a 2M. The Vanquish, if it ever comes out, may be the way I go. But, it depends on it coming out sooner rather than later.
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Old 04-02-2010, 10:34 AM
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Default RE: Weight and motor/power question



I came across a good "Rule of Thumb" when it comes to converting gas to electric or gliders to electric.  They guy said to use 100 Watts per pound.  Now I know you need a good Watt meter, and you will need to play with props/versus ESC amps, but I have found his course instruction to be pretty close on.  At 100 Watts per pound you will get sporty performance.


KKKKFL

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