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Old Jun 18, 2012, 05:51 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,035 Posts
Quote:
Originally Posted by scorpion-fan View Post
its easy!
use "java prop" http://www.mh-aerotools.de/airfoils/javaprop.htm
(programmed by dr. martin hepperle) and send your file to stefan heuel ((sheuel><attt><web.de)).
he will use your *.jpdata -file to make a milling file and mill a aluminium mould for your calculated prop.
before milling you will get a 3D model file of your prop.

the costs are imo reasonable:
about 200 for the polished mould.
OK, I played around with Javaprop, and it is not all that easy! Scorpion-fan, would you be willing to share the data of one of your 7" folders? It's doesn't have to the the latest and greatest, but I want to look at getting CNC made moulds and starting from scratch is tricky!
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Old Jun 18, 2012, 10:46 PM
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arcticflyer's Avatar
Canada, SK, Prince Albert
Joined Jan 2006
1,487 Posts
I'm with ya on the CNC moulds...I would like that 8x12 fixed that is in the pic. With the motor I have coming and the new Monster 1.1 bet I could bust 250 with it easy.
Learned alot from that last build this one should go smoother and faster...problem is...getting ready to go visit family in the States which is going to slow the build down quite a bit!

Canada Post says the Monster should be at my house tomorrow....
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Old Jun 19, 2012, 05:51 AM
Why the dirt on the wings?
moparmyway's Avatar
New York
Joined Jan 2009
4,997 Posts
Where in the States ?
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Old Jun 19, 2012, 07:05 AM
444 kph
scorpion-fan's Avatar
Joined Nov 2008
513 Posts
down under,

only diameter and pitch are not enough to describe a prop, you can make a prop with same diameter and pitch very, very different.
thre is needed more than only the prop diameter for a usable layout for a special reason.

minimum additional are needed:
wished round about input power level and rpm-level at working point and targeted speed, the main data of model (wingspan, area, weight, airfoil, used battery)
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Last edited by scorpion-fan; Jun 19, 2012 at 08:44 AM.
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Old Jun 19, 2012, 10:24 AM
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Canada, SK, Prince Albert
Joined Jan 2006
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Mopar - I'll be in the Elkton, Maryland area. My boy is graduating from Parris Island (Marine Corp Boot Camp) so I will be making a couple of trips down that way to see him and I plan on going to Vic's Speed event in NC while 'm down there as well.
Should be a fun month...leaving here Friday.
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Old Jun 19, 2012, 03:36 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,035 Posts
Quote:
Originally Posted by scorpion-fan View Post
down under,

only diameter and pitch are not enough to describe a prop, you can make a prop with same diameter and pitch very, very different.
thre is needed more than only the prop diameter for a usable layout for a special reason.

minimum additional are needed:
wished round about input power level and rpm-level at working point and targeted speed, the main data of model (wingspan, area, weight, airfoil, used battery)

Sorry to hijack your thread here arcticflyer...

Scorpion-fan:

P in: 4000-5000W
RPM: 27-30,000
vMax: 100-120 m/s
Wing Span: 1300mm
Target weight: 2200g
Airfoil: MH-54
used battery?: 8/9/10S, ~2200-3000 Mah ?

I have read all the java prop theory and understand what you're saying. However I also know a 7" prop is a good starting point for this sized model. I never specified a pitch
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Old Jun 20, 2012, 03:05 AM
444 kph
scorpion-fan's Avatar
Joined Nov 2008
513 Posts
you better should start a new thread about this.
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Old Aug 30, 2012, 03:39 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,035 Posts
Quote:
Originally Posted by scorpion-fan
its easy!
use "java prop" http://www.mh-aerotools.de/airfoils/javaprop.htm
(programmed by dr. martin hepperle) and send your file to stefan heuel ((sheuel><attt><web.de)).
he will use your *.jpdata -file to make a milling file and mill a aluminium mould for your calculated prop.
before milling you will get a 3D model file of your prop.

the costs are imo reasonable:
about 200 for the polished mould.
Scorpion, is this email address valid? I have contacted Stefan on the email address above but there is no reply.

Thanks.
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Old Aug 31, 2012, 12:50 AM
444 kph
scorpion-fan's Avatar
Joined Nov 2008
513 Posts
yes, it is.
I hope, you have replaced the " ><att>< " by a simple "@ "
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Old Aug 31, 2012, 03:20 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,035 Posts
Yes, thanks, he's replied to me! Cheers
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Old Aug 31, 2012, 05:40 PM
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arcticflyer's Avatar
Canada, SK, Prince Albert
Joined Jan 2006
1,487 Posts
New Motor for Testing

The 22/60/1E arrived from across the pond...it is a 36mm motor that is 90mm long

The KV on this motor as tested by PeterM is right around 1400 and according to all his prop testing data it is quite a beast

Due to the length of the motor and Mega's stiff wires (hate them) I had to make them into little pig tails by winding them around a pen (carefully I might add).

As soon as I get a few flights in with the new motor mount in the Monster 1.1 and get that airframe completely dialed in, this motor is going in.

It will be tested using props that Marcus is making for me 7.6x12.5's and at 6 to 7S should put the Monster into orbit

With that said the next motor will be one of Steve's 1518 or 1521's with a KV that is better for super sonic than the high kv 1515 that I have now. Will say this...that Neu 1515/1y was burried in a field (8 inches). Then later down the road came out of the front of a plane at over 200, sailed through the air for over 50yards, hit the field....and still runs!!! Great product Steve!
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Old Aug 31, 2012, 05:53 PM
Drinks Day Old Expired Milk
VooDoo Child's Avatar
United States, OR, Portland
Joined Aug 2010
2,833 Posts
That is some Wicked CZ Goodness
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Old Sep 01, 2012, 05:34 PM
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Peter M's Avatar
Newcastle, New South Wales, Australia
Joined Sep 2007
2,366 Posts
New Motor for Testing II

Arctic,
You'll enjoy your 22/60/1E!

I've just bolted mine into a Parkzone Stryker Q: http://www.rcgroups.com/forums/showp...&postcount=193




I've also just started static testing an outrunner with folding blades and have been impressed to date:

RFM Spinner 38mm
Koch 9.8x17 Blades
ICE HV 160
Scorpion HK4525-520 Ultimate

10 Cells
35.5 volts
129 amps
4580 watts
16,525 rpm or a pitch speed of 266 mph

12 Cells
42 volts
157 amps
6608 watts
19,057 rpm or a pitch speed of 307 mph.....

and it has the capacity to run more pitch or diameter if need be.
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Last edited by Peter M; Sep 01, 2012 at 09:07 PM. Reason: Wrong url
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Old Sep 01, 2012, 08:47 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,035 Posts
What the heck are you going to put that onto, Peter? Impressive!
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Old Sep 01, 2012, 08:52 PM
Registered User
Peter M's Avatar
Newcastle, New South Wales, Australia
Joined Sep 2007
2,366 Posts
Ritewing Demon 50

http://www.rcgroups.com/forums/showthread.php?t=1691229
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