What size prop should I use for an Astro 10 direct drive. Also, what number of cells should I use and what range of amperage draw should I expect.
I have no instructions or spec.sheets.
Thanks, D.
What size prop should I use for an Astro 10 direct drive. Also, what number of cells should I use and what range of amperage draw should I expect.
I have no instructions or spec.sheets.
Thanks, D.
The prop depends on the cell count.
I would say try
| What size prop should I use for an Astro 10 direct drive. Also, what | number of cells should I use and what range of amperage draw should I | expect.
Google for `motocalc', get it and download it. It gives you a 30 day trial free, which should be more than enough.
Tell it about the plane you have, tell it you've got an Astro 10 motor, direct drive, then give it a range of props and of batteries, and let it work out the expected performance for each setup and make your own conclusion.
There's a small learning curve, but it's not too bad. And it can save you hundreds of dollars guessing at the right battery packs and props and frying ESCs because you over-amped them ...
Is this the little Astro 010, smaller than speed 400 sized? If so, it's meant for around 8 cells NiCd/3 cells LiPo, so you'll probably want to start around there. I think the maximum amperage is around
9-10 amps. I'd start with 6x3, 5x5, 4.7x4.7 and similar props. You might also want to get a gear box for it -- I think they're around $30-$40, and might help it perform better for most of the sorts of models you'd use it on. Model it all with motocalc first before you buy anything.David: Since you specified direct drive instead of geared, i can show you two examples of Astro 010s on 2-cell lipos that perform extremely well. One plane uses the Master Airscrew 5.5 X 4 prop that came with the motor. The other uses the popular Gunther 4.9 X 4.3 'Wingo'/Zagi prop. Both draw about 7=BD amps static at WOT. No doubt they unload some in the air. See-
Bill(oc)
The motor is an ASTRO - 10 not an 010. I also have an 010.
So, my questions stand.
Thanks, D.
| The motor is an ASTRO - 10 not an 010. I also have an 010.
I can't find any information on an `Astro 10' motor that is not the little Astroflight brushless 010. Not even on Astroflight's web site, not even in the list of motors included in Motocalc.
| So, my questions stand.
And my answer stands ... except that Motocalc doesn't know anything about your motor either.
Are you sure that's what it is? Is it even by Astroflight? (That was my guess based on the name, but I haven't actually seen it, so it could easily be wrong ...)
Call up Astroflight, ask them what you've got, and what the parameters for it are (Kv, Io, Ro) and what the maximum power/current/speed permitted are and then you can weight it, and enter all of that into Motocalc and it'll make suggestions.
Armed with these figures, you could probably do much of the work yourself with little more than a calculator, but exactly how to do this would make for a pretty large post. Just let Motocalc do the work.
Yeah, David. Any search for an 'Astro 10' motor comes up zilch. Are you sure it's *Astroflight* brand and not something else? Bill(oc)
I certainly have never heard of an Astro 10 in ether the cobalt or brushless ranges.
Maybe the old ferrite stuff?
Never heard of an Astro FLight 10 , but they have an 010 and an 020 I have the 020 brushless on a VIP 400 pylon racer. I run a Cam 5.25 x 4.75 prop on it , course that won't help you any. These small direct drive motors will not swing a very large prop.
Call Bob Boucher at Astro Flight and if it's not one of their motors I'm sure he can give you the info on what you have. He's one of , if not THE best motor engineers in the country.
Ken
| Call Bob Boucher at Astro Flight and if it's not one of their motors | I'm sure he can give you the info on what you have. He's one of , if | not THE best motor engineers in the country.
Speaking of Boucher, if you really want to understand motors, get his book, `Electric Motor Handbook' --
Of course, you could just skip the book entirely and just use Motocalc
-- Motocalc basically uses the same formulas, adds some more, and does the hard work for you. But even so, it's useful to have at least a passing understanding of these principles.
Thanks Doug , I already have it. It is a great book and even though there's not much on brushless most of the info is good for both brushed and brushless. Appreciate the info
Ken
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