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Jan 02, 2020, 08:49 AM
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732002's Avatar
Would love 7x10 or 7x12 also.

Needed for Mega 16/30/2 on 4s1800 in Reverb/Rifle, If anyone has other size recommendations.
Want speed of course and noise is a issue at my club. 100amps would be about right.

thanks
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Jan 02, 2020, 10:42 AM
#who gives a rats a**?
feefo's Avatar
Quote:
Originally Posted by 732002
Would love 7x10 or 7x12 also.

Needed for Mega 16/30/2 on 4s1800 in Reverb/Rifle, If anyone has other size recommendations.
Want speed of course and noise is a issue at my club. 100amps would be about right.

thanks
Depending on WOT duration, the 7x 10 might be a bit much for the 16-30-2, here's a static test of my 16-35-2E on 4s and DUP's 7x 10. The 38mm yoke might be slightly bigger than what you use on your Reverb and a smaller yoke would help drop the amps a bit. I don't have a flight log of my 16-35, which is strange because I usually download the logs and have at least a couple of flights to compare data with. But my 16-40-2E on 5s and the 7x10 is 85a static which drops to around 62a inflight, if that helps.

Maybe you could trim the blades down a bit to drop the amps but I'm not sure it'd be enough.
Jan 02, 2020, 12:02 PM
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732002's Avatar
Thanks, I should add that it is the E version. 16/30/2CE. I have flown on 4S1800 with 9x6 ,lacked speed and was scolded for the noise. Logged about 1600 watts but castle reads high.

The 5mm shaft really limits the non folding spinner options in 35/30mm
Jan 02, 2020, 01:32 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
Just PM me, thanks.
Jan 02, 2020, 02:37 PM
#who gives a rats a**?
feefo's Avatar
Quote:
Originally Posted by 732002
Thanks, I should add that it is the E version. 16/30/2CE. I have flown on 4S1800 with 9x6 ,lacked speed and was scolded for the noise. Logged about 1600 watts but castle reads high.

The 5mm shaft really limits the non folding spinner options in 35/30mm
true
Jan 02, 2020, 08:19 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
Oh forgot to mention I also have a 9x19 folder that is designed for max of about 1KW. It's not been trialled a lot though but was CAD designed from scratch and should go OK.
Jan 05, 2020, 07:42 AM
www.speedcroco.de
7,5x13,5 folderblades for u250g
Jan 09, 2020, 11:47 PM
Registered User
Those are amazing! What kind of RPM do you run those at? When I imagine a 250g plane I think 5" prop or smaller.
Jan 11, 2020, 04:15 AM
www.speedcroco.de
about 10.000 to 12.000rpm.
in real life ("official measuring distance) good for 200km/h+ , shorted also for more.
definately no stability problems.
and also realy fast climbing.

very silent - this is my goal.
Jan 11, 2020, 10:33 AM
Registered User
Quote:
Originally Posted by powercroco
about 10.000 to 12.000rpm.
in real life ("official measuring distance) good for 200km/h+ , shorted also for more.
definately no stability problems.
and also realy fast climbing.

very silent - this is my goal.
Is this in the micro eisvogel? Or on something else? I love silent planes, but the speeds I go at are a bit different!
Jan 11, 2020, 11:22 AM
www.speedcroco.de
they work in some models, mostly 2 and 3 bladed props.


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