11 replies to this topic

[ericdeborde]

I made litle outdoor blimp (10' long / 60 km/h of speed)
see : http://www.media-zep.com
brushless motors and LiPo bat

Galerie photo, video of the blimp and abord video !

Some contacts to make your personal proto:
For enveloppe : http://www.balloonki...es/catalog.html
For motors : http://aircraft-worl...l...s - 0-MICRO
http://www.skyhooks.ca/WMotors.htm

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Edited by ericdeborde, 27 September 2005 - 11:36 PM.

[Terry]

Hey..if that blimp is only 10 inches long..how tall are you ?

Terry

[Terry]

I just had a good look at your web site, very interesting idea, I would be worried the ship would be blown away. How often do you find it too windy to fly ?

Terry

[ericdeborde]

this blimp stand up to 15 Kt wind in laminate air, 10 Kt in turbulant air

[ericdeborde]

Sorry for " insted of '

I am a metric man !
A frogy French !

[Temporary Insanity]

I want to your website and I am very impressed. Did I see the motors reverse?

There must also be a best balance point. Where it that?

Also: the balloonkits.com seems to only show metalized Mylar. Did you get your Mylar there? If so, what thickness is it?

Seriously... I showed your site to my wife. She instantly wanted me to build one, so expect a flood of questions!

Thanks...

Edited by Temporary Insanity, 04 September 2005 - 12:41 PM.

[ericdeborde]

Motors are not yet reversing but they will be.
One motor is turning left, one is turning right (it is contra-rotation) for a zero torque.

The best balance point is from 30 to 48% from the nose (depending of the size of the fins).

The best film for this size of blimp would be 30 microns.
I will make a test with balloonkits.com's Mylar.
I would like to find Polyurethane film, but it is very hard.

[Temporary Insanity]

What about Heptax?

[ericdeborde]

Heptax can be used.
I think it is not stretchy enough.
I would prefer polyurethane.

By the way, I am looking for 30 micron polyurethane!

[Temporary Insanity]

Do you really mean polyurethane or do you mean polyethylene like the clear bags that everything comes in these days?

[ericdeborde]

Polyethylene is good for testing but is not good for helium.

Polyurethane is Helium proof.
I will soon have a big roll of it (2/3 months) (140 kg)
I will then manage to resale small quantities by meter or by Kg.

[Temporary Insanity]

I might be interested in buying some. From your videos it looks like shipping might be expensive. Please keep my in mind!