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MS Composit › Thrust from different setups?
12-13-2004 05:04 AM  13 years agoPost 1
Lowell Foo

rrApprentice

Vancouver, BC, Canada

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Did some testing on my H2 to measure peak thrust of the Himax 4015-4100 and AC1215/16. Both on 12t pinions and fresh TP1320 packs. I taped the heli to a scale and hit zero, and then measured how much 'weight' the heli could generate on the negative pitch side. The Himax would do 740-750g, and the AC1215/16 was the clear winner at 790-800g.
Speed controller on both was a PHX-10 in high advance. On the Himax motor, there seemed to be no difference between standard and high advance, but on the AC1215/16 there seemed to be a consistant 10-20g difference.
Oh ya, blades used are weighted MS Composit.
Anyone else tried a test like this? I'd like to see a measured comparison between a Hacker B20-22s and the AXI 2208/20.

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12-17-2004 03:04 PM  13 years agoPost 2
mattijs

rrApprentice

Keerbergen Belgium

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i wouldn't be surprised if they'd be close to 1 kg

That's about 10 Newton so a 333 gram heli with that power can go upwards from a hover at 2.4 G's. (force downward is 3N, upwards 10 so 7 is over for actually accelerating....f=m.a...with m = 0.3 kg and f=7N yields a=23.4 m/s*s which in turn is 23.4/9.81 = 2.4 G)

You'd think it's more when looking at them going up.

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12-18-2004 12:25 PM  13 years agoPost 3
Lowell Foo

rrApprentice

Vancouver, BC, Canada

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Anyone know what the lift to weight ratio is on a 90 size nitro heli? Wattage wise, I think a 330g H2 would need around 140W to match up on a watts/lb scale, but I'm not sure how thrust/watts would work. If 100W can make 10N of thrust, will 2000W make 200N?

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