swatson144
01-20-2005, 08:37 PM
just tested my 1st distributed LRK. I am astonished! I want to point out that all wires are about 4" to long as I figured I'd want this thing Delta in the end but testing it wye was free. I am used to about 1.75 thrust to amps drawn. with the 9 arm 22.7mm, well maybe a little sweater with the right prop, or sour side with the wrong one, but pretty much right there. trying the 25mm 9 arms I started seeing around 2.3 t/a (thrust/current dc at the speed controller I like t/a pardon me if I continue to use it, please substitue any term that is more correct) which is much better for flying longer. Flying longer is fun as long as the motor exceeds min acceptable standards (whatever they may be) for the application. This motor produced a low thrust, which was expected (high turn wye), and was under propped with my biggest. A 10x7 APC SF, I didn't test anything smaller.
10x7 APC SF 160G thrust 1.9A 7.14V 1710rpm
160g 1.83A 7.14V 1710rpm
several more tests same same
no load .33A 7.81v 3500rpm
2.9 t/a
I don't know if the huge difference in rpm light load / no load is normal. Until JayC mentioned it, it never occured . Then :idea: . I should measure that! I'm slow but I am stupid!
I used leftover GB 4x10x2 magnets. the stator was a 5 stack 25mmx12arm GB. The can was made from the fluxring material thread, sans broaching (still working on that). The cogging with this setup is amazing. It feels like the tuning knob on a side control RCA television!
Somewhere around here I have some like 12x8 etc GWS eps props, that came with kits, and I'd like to test with them then configure the thing Delta and see how it goes from there.
If I'm fundamentally screwed up please point it out that others may learn, and me too. Questions? I'll try. suggestions I'll likely get there in time, but I'd like to hear them. Next is 10 mags same setup wye then delta. Gotta buy more mags and stators,
10x7 APC SF 160G thrust 1.9A 7.14V 1710rpm
160g 1.83A 7.14V 1710rpm
several more tests same same
no load .33A 7.81v 3500rpm
2.9 t/a
I don't know if the huge difference in rpm light load / no load is normal. Until JayC mentioned it, it never occured . Then :idea: . I should measure that! I'm slow but I am stupid!
I used leftover GB 4x10x2 magnets. the stator was a 5 stack 25mmx12arm GB. The can was made from the fluxring material thread, sans broaching (still working on that). The cogging with this setup is amazing. It feels like the tuning knob on a side control RCA television!
Somewhere around here I have some like 12x8 etc GWS eps props, that came with kits, and I'd like to test with them then configure the thing Delta and see how it goes from there.
If I'm fundamentally screwed up please point it out that others may learn, and me too. Questions? I'll try. suggestions I'll likely get there in time, but I'd like to hear them. Next is 10 mags same setup wye then delta. Gotta buy more mags and stators,