the Otherpower.com Discussion Board || Comments 1.5KW at ground level with chainsaw built blades.

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1.5KW at ground level with chainsaw built blades. | 13 comments (13 topical, editorial)

Re: 1.5KW at ground level with chainsaw built blad (3.00 / 0) (#1)
by Flux on Mon Aug 18th, 2008 at 03:06:57 AM MST
(User Info)

Nice work , it looks good.

I like the prop mounted directly on the plate attached to the hub. Blades look nice.

If it is working that well at ground level it will do even better up in clean air.

I suspect you are right about the rising battery voltage favouring the output, it is more favourable than being tied directly to constant voltage. The lower voltage will hold speed down and bring in more stall .

Flux

Re: 1.5KW at ground level with chainsaw built blad (3.00 / 0) (#2)
by oztules (oztules__at__bigpond.com) on Mon Aug 18th, 2008 at 06:19:54 AM MST
(User Info) http://www.anotherpower.com/gallery/Oztules-toys

Thanks Flux. I owe a great deal to you for this result.

The star resistance comes in at 384 feet of 1.8mm wire ie 6 coils of 64 feet each = .784 ohms. (@2.042ohms /1000 feet).

With this in mind, I don't see the alternator sagging as rpm climbs, so I assume that the TSR will suffer. May need some resistance in the line when hooked up to a real bank of flattish batteries...yet to see.

Thanks again..........oztules
Flinders Island Australia
[ Parent ]

Re: 1.5KW at ground level with chainsaw built blad (3.00 / 0) (#3)
by oztules (oztules__at__bigpond.com) on Mon Aug 18th, 2008 at 06:39:01 AM MST
(User Info) http://www.anotherpower.com/gallery/Oztules-toys

That was badly written, that is:
Only 0.784 ohms for 6 coils ie 1 star phase.
Each coil is only .784/6= 0.13 ohms per coil.
I guess Delta is .13x3=.39 ohms per phase.

........oztules

Flinders Island Australia
[ Parent ]

1.5KW at ground level with chainsaw built blades. | 13 comments (13 topical, 0 editorial)

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