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HelicopterAerial Photography and Video › High altitude maxi2
11-29-2005 10:49 AM  12 years agoPost 1
RichardV

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UK

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I need to put a maxi2 together for AP/AV. I've been through a lot of the previous posts and I notice you're all setting up to run at +-1250 headspeed. We're at 5,500 feet in south africa and it's hot, so I think we'd need a much higher headspeed, say 1600 rpm to get off the ground.

Can anyone recommend a setup with motor, controller and gear ratios.
Thanks
Richard

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11-29-2005 11:53 AM  12 years agoPost 2
daveye

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North Carolina

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You should be fine with the altitude. I know they fly around Denver Colorado without a problem.

Good luck!


David

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11-29-2005 02:18 PM  12 years agoPost 3
RichardV

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UK

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Did you need to increase the RPM at all? The air is very thin over here due to the heat (like zamora, spain). Our turbine runs at 1600 with 820mm blades to lift all the kit and the way everyone is talking 1200-1300 is worrying.

Is there any advantage to the TT tail for AP?

Thanks
Richard

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11-29-2005 02:28 PM  12 years agoPost 4
JohnC

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East Yorkshire, England

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Richard,

The manual for the maxi Joker-2 states the maximum RPM is 1,400.

I would check with Gerd/Minicopter before running anything higher.

John C.

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11-29-2005 02:46 PM  12 years agoPost 5
Load Factor

rrApprentice

Colleyville, Texas

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1600 with 820's.........

What turbine are you flying?

Sounds a bit scary to me.

Tanner

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11-29-2005 02:57 PM  12 years agoPost 6
RichardV

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UK

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The turbine runs dead sweet, more than enough power to carry anything we want. It's the cuatro conversion.

I've just seen the speed limitation in the manual. We need to carry 3.4 kilos and the heat, altitude combination (QNH 1024) makes us wonder whether the maxi can carry it. Unfortunately we have no local expertise with the jokers to advise, so it's up to searching the internet again.

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11-29-2005 03:57 PM  12 years agoPost 7
ELOSSAM

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Es

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Zamora...? Spain...? was you here this summer Richard?

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11-29-2005 05:16 PM  12 years agoPost 8
tabbytabb

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seattle

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I dont think it will be a problem at all even with the lower headspeed.

I flew my joker CX on 710s at 12,000 feet in Aspen and there was a tiny bit of power loss but still totally flyable. This was hauling a 6-7 pound payload (350D with 20mm lens)

I did notice that the headspeed was a fair bit higher at that altitude due to the thinner air I guess.

I cant imagine your flight times would be too long spinning 800+ blades that fast, it would really chew through the Mah

here is a shot of the joker at 12,000 feet

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11-30-2005 02:20 AM  12 years agoPost 9
daveye

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North Carolina

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Tabb that is a nice shot of the maxi

David

PS i havent been on here for ever it seems

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