[JetGirl]

I am working on a project that has two battery powered "flaps". I was wondering if anyone knows the best kind of battery for this kind of thing. They are made out of carbon fiber and a bit of aluminum. They will have quite a bit of pressure on them, oh say, around 10 psi. I have the mechanics of it worked out but i don' know what type of power source to use. Thanks!!!

[Al_The_Man]

You say battery powered, but How? What is the electrical device that is operating them, without this it is hard to suggest a power source.
Or do you not have that part figured out?
Do you need to design the activator? If so more information is needed.
Is weight and size an issue?
Al.

[JetGirl]

No, i dont have a design yet
Yes, weight and size matters because it has to fit in a small space and it can't have sharp objects sticking out of it because it will be by two fuel tanks.
Any ideas?

[Al_The_Man]

A rough idea of the power required would be an advantage, also the duration of power under battery, I assume you would like a re-chargeable solution?
Without these spec's it is rather hard to suggest a solution as there are different technologies out there.
NiMh (Nickel Metal Hydride), NiCd (Nickel Cadmium), lithium polymer.
Al.

[JetGirl]

I dont really need a re-chargeable battery, but it needs to be around 12 volts and I would need two of them.

I am sorry, I don't have much info yet.

Do you work for a materials testing company? If, you consider this a personal question, you don't have to answer, i just think i might know you

[Jason3]

Jetgirl,

Might this be the sort of thing you need?

http://rsproductsonline.com/index.ph...152f6942fd5b29

Runs off 12v, will provide up to 750 Lb force I think. It won't back drive, so will only use power when it's actually being extended or retracted. They're available in various stroke lengths, and are quite light for the force they can provide. I'm guessing a safe battery would be desirable (ie, one that won't explode on impact...), if so I would consider A123 LiPo batteries - light weight, very high current capacity.

Best regards,

jason

[JetGirl]

that would be fantastic!! just what i am looking for!! thanks so much!!

= D

[BillTodd]

How about satellite dish type actuators?

DC Actuators



They're fairly low cost, come in various sizes with stroke lengths from 2"- 40" and usually have a reed-switch position counter output.