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Powering my Glider!

Old 01-03-2003, 08:37 AM
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Hisham
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Default Powering my Glider!

I am scratch building this 190cm glider,
and am powering it by a Speed 400 direct driving
a 6x3 folding prop; batteries that I am considering
are a pack of 2000mAh, 7.2 v ; however, it turned
out to be extremely heavy,.......!
Was checking the new generation of batteries the
other day and came across the Lithium Ion....
Any opinions about this kind of powering system??
Two cells are giving me 7.2v and 1800 mAH with
a much lighter weight; you will not imagine !
Need your opinions about this new setting before
I can start assembling the new system???
Cheers as well as Jeers???

Wishing you all a Happy New Year full of sucess and safe Landings!


Hisham.
Old 01-03-2003, 03:10 PM
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Ollie
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Default Powering my Glider!

Check the maximum current rating of the lithium cells and compare that with the maximum current requirement of the motor loaded with the prop. The lithium cells have a wonderful energy density but they require a special charger. They will be quickly destroyed if over charged or discharged completely. I think you will find that the maximum allowable discharge current is another limitation. Please let us know what you find.
Old 01-03-2003, 08:49 PM
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Cadet
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Default Powering my Glider!

There are new Lithium Polymer cells available from FMA Direct that will power a Speed 400 system. I would also recommend a gearbox and larger prop as opposed to direct drive.
Cheers,
Grant

P.S. Lithium Ion WILL NOT WORK!
Old 01-12-2003, 09:28 PM
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da king
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Default Powering my Glider!

I had a 59" hlg that i put a speed 480 in with the same prop. I used 7 and 8 cell 600 nicd batterys. I would get about 5 to 6 climbs out of a charge. I tryed the 1100 nimetal and they melted. The 600's can take the abuse a lot better. It did just about double the wieght but it flew better!!!!! It was about 20 to 25 oz ready to go....I think.
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Old 01-13-2003, 06:58 AM
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Hisham
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Default Powering my Glider!

da king
What prop are you using??
for this motor?

Hisham
Old 01-14-2003, 12:21 AM
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da king
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Default Powering my Glider!

I think the co is called diamond. Folding 6x3. All in one unit.

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