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Forum: Electric General Discussion

10-12-2005, 10:12 PM

Replies: 5

need help plotting air foils

Views: 523

Posted By Kwok_Yu

RE: need help plotting air foils

I use this free progam to print out airfoils:
http://www.rc-soar.com/hardsoft/profilerev.htm

Forum: RC Radios, Transmitters, Receivers, Servos, gyros

02-06-2005, 02:42 AM

Replies: 5

Optic 6 or Futaba 7C?

Views: 688

Posted By Kwok_Yu

RE: Optic 6 or Futaba 7C?

I think the first question is do you care anything about changing the TX frequency? The 7C can't be changed without sending it in. The optic has freq modules and synth. Next you should decide if...

Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service

01-29-2005, 02:03 PM

Replies: 10

SW bugs on Optic 6

Views: 1,382

Posted By Kwok_Yu

RE: SW bugs on Optic 6

Thanks CFIMEI,

Sorry, I wasn't able to comfirm you bug the first time. That was because I had the throttle centered. But at least it is now documented.

I have started to post some...

Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service

01-29-2005, 10:08 AM

Replies: 10

SW bugs on Optic 6

Views: 1,382

Posted By Kwok_Yu

RE: SW bugs on Optic 6

Thanks, glad to know this.

Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service

01-29-2005, 12:25 AM

Replies: 10

SW bugs on Optic 6

Views: 1,382

Posted By Kwok_Yu

RE: SW bugs on Optic 6

Brendan Lugo,

Thanks for the quick reply. I am going to run some discharge tests on my charger. Can you tell me the operating current of the opitc6 with spectra module and with a fixed freq...

Forum: Hitec/MultiPlex Radios- Ask Hitec Customer Service

01-28-2005, 07:17 PM

Replies: 10

SW bugs on Optic 6

Views: 1,382

Posted By Kwok_Yu

RE: SW bugs on Optic 6

Brendan,

Can you look in to the 8.8volt low voltage value? Especially, if this would be sufficient for NiMH batteries. The optic manual states below 9.3 volts, which sound like the correct...

Forum: Electric Indoor & Micro RC Flight

09-30-2004, 12:42 AM

Replies: 5

$16 micro r/c airplane

Views: 2,259

Posted By Kwok_Yu

RE: $16 micro r/c airplane

hobbydawg,

Good work. I can help you with the prop. You can make one from the plastic of a 2 liter coke bottle. Cut a piece 1/4" x 1 3/4". Mark the middle and poke a tiny hole with a pin. ...

Forum: Unusual R/C

09-22-2004, 03:58 AM

Replies: 3

tip driven helicopter

Views: 1,034

Posted By Kwok_Yu

RE: tip driven helicopter

I was thinking of doing the same thing, but micro using pager motors. Well that's my next project. Right now I am working on a micro round the pole (RTP) control line project, which uses a homemade...

Forum: Aerodynamics

09-05-2004, 05:11 PM

Replies: 6

Understtanding CG calculations.

Views: 1,260

Posted By Kwok_Yu

RE: Understtanding CG calculations.

Villa,

I don't think that is an good description, but rather flawed. It just saids to place the CG using the ratio of the wing area and the canard area. For example, if the canard is 20% of...

Forum: Scratch Building, Aircraft Design, 3D/CAD

07-01-2004, 04:01 AM

Replies: 5

Single wire foam cutter HOW TO MAKE ONE?

Views: 5,541

Posted By Kwok_Yu

RE: Single wire foam cutter HOW TO MAKE ONE?

To size a power supply you have to use ohm's law:
I = E/R where I is current, E is voltage, R is resistance
On a wall adapter, voltage and current are written on the label. Voltage is always...

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