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Jul 23, 2003, 02:56 PM
Thread OP

Solar Model

Jonas Romblad of Stockholm Sweden just sent me this photo of his astro 010 solar powered model. 2.3 m span. weight 480
grams. solar panel provides 25 watts of power at noon day sun. model will fly on
as little as 10 watts.
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Jul 23, 2003, 03:03 PM
Tee Sqaured
Thomas Manson's Avatar
Very cool!!!!!
Jul 23, 2003, 05:18 PM
Registered User
BEC's Avatar
Indeed, that is a wonderful application. Don't you wish you had some of the current technology back in the Sunrise days?
Jul 23, 2003, 08:57 PM
Under tension
citabria's Avatar
Cool! I'd like to know how this is done. Where do you get solar panels that are light and efficient enough? Is there a bettery pack that is continually charged? That's amazing.

Jul 23, 2003, 09:03 PM
Registered User
JIMJAM's Avatar
I sometimes have to wait for days for the wind to die down enough to fly. Now I would also have to wait for a sunny day too? Neat idea though.
Jul 23, 2003, 09:49 PM
Thread OP

solar power

the solar cells we used on sunrise were
14% efficient and weighed 4.5 lbs for 600 w
or about 11 watts per ounce. but they were
expensive , 600 watts over 100,000 dollars.

on the solar challenger we had 5 kw in 16,000
cells at a cost of over 1,000,000 dollars.

the new cells today have twice the efficiency
or about 29 % but the cost is still very
very high, between 10 and 25 dollars a watt.
so figure for that model 250 to 600 dollars.

Jul 23, 2003, 09:53 PM
Thread OP

no batteries needed

no batteries are needed.
the excess power is stored in altitude
(potential energy in the earths gravitations field.)

this model had no propulsion battery
but it did use a small receiver nicad for the
Jul 23, 2003, 11:43 PM
Is that a scratch built model? What is the wing area... That is very very cool. Neat stuff...

Jul 24, 2003, 06:26 AM
Registered User

Where would be a good place to get the appropriate solar cells? I now use the Astroflight 010 14T w/3.3:1 gearbox & LiPos in a foamie wing for flying a long time. Solar intrigues me.

- RD
Jul 24, 2003, 07:29 AM
Hiigaran member
Lone Yankee's Avatar
Way to go AstroBob! Keep up the great work. I am not exagerating when I say that this hobby and, indeed, this forum may never have come to be without your hard work over the years.

(PS, LOVE my 010!) -LY
Jul 24, 2003, 08:44 AM
Pack Rat
KLH's Avatar
Have to second what the Lone Yankee said about e flight and where it is today because of you and your efforts through the years.
I've been one of your loyal subjects for a long time. Started to play with E stuff many years back, but what really hooked me was a meet up in Reno many years ago where you competed with a Vicking oldtimer and I belive one of your cobalt motors.
I use a lot of your brushless motors, but one of my favorite motors is an 02 cobalt 9 turn which unfortunately you don't manufacture any more.
Love the solar stuff. Hope the cost per watt keeps coming down.

Last edited by KLH; Jul 24, 2003 at 08:47 AM.

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