Graupner Cirrus 21st Century edition

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stuart mackay
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Re: Graupner Cirrus 21st Century edition

Post by stuart mackay »

12 x 6 folder and 38 mm spinner now in my possession.
Thanks Wayne for the recommendation! Will report back on performance later :D
Spike S
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Re: Graupner Cirrus 21st Century edition

Post by Spike S »

It should go up like a rocket ! My Cirrus launched quite happily but sedately using a 'piggy-back' OS 10 over the wing. Long deceased now though as the ABS fuz disintegrated with time.
Spike S
(Tune for maximum smoke)
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stuart mackay
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Re: Graupner Cirrus 21st Century edition

Post by stuart mackay »

12/ 6 seemed to cause a current drop to about 20A so need to look at that again with a freshly charged battery.
Tried an AeroNaut 12x7 with a fresh battery and current was initially high thirties and dropped to a steady state of 33.5 Amps.
AeroNaut 12x7 reduced.jpg
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tiptipflyer
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Re: Graupner Cirrus 21st Century edition

Post by tiptipflyer »

It sure will go up like a rocket with this power unit.
My Cirrus is well over 40 years old, still with the original ABS fusalage (breaks repaired at least 20 times). It is a great flyer, but I have to be carfull during cold weather and during landing. The ABS fusalage is not forgiving any mishaps esp. in cold weather. But no problems in the last five years after the last restauration.
I use an original "piggy-back" power pod with an 2836 brushless motor on 3S lipo, a 9x6 prop drawing a little over 20A and it is going up quite well.
Flight-times of one hour are common.
I use the same power pod on my Cumulus and Graupner K8b, they all have the same wing section.
Cirrus5.JPG
Frank
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stuart mackay
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Re: Graupner Cirrus 21st Century edition

Post by stuart mackay »

A bit more progress on the fuz today saw the epoxy glass Canopy frame fitted :D
Spinner is set a bit forward as I am waiting for some countersunk M2.5 screws to arrive to replace the cap heads
16375108071763925363263692042072.jpg
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stuart mackay
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Re: Graupner Cirrus 21st Century edition

Post by stuart mackay »

Painted copy frame and bonded canopy in place using pva
16375658746057828742931089666138.jpg
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Wayne_H
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Re: Graupner Cirrus 21st Century edition

Post by Wayne_H »

Hey Stuart, where is the driver??? :o
Cheers,

Wayne
Once a Retrobate, always a Retrobate............ ;)
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stuart mackay
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Re: Graupner Cirrus 21st Century edition

Post by stuart mackay »

On the ground hopefully :D :D :D
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