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Old Mar 05, 2013, 12:22 AM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,391 Posts
Quote:
Originally Posted by sykotic View Post
I reckon you will have room to go with a external bec no matter what.... The castle ones are tiny and make things so much safer.
+10
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Old Mar 05, 2013, 12:23 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
970 Posts
Keep the setup info coming guys. When there's enough I'll put together some sort of data table with prop, cells, amps, rpm, watts etc. Just to make the info more easilly atainable.
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Old Mar 05, 2013, 01:01 AM
The Prop is Where its At!
blitzu's Avatar
New Zealand, Bay Of Plenty, Omokoroa
Joined Dec 2012
846 Posts
Swt Sykotic that wud be really appreciated,cheers.Even a +2.5 if ya got one
Thats a swt idea SlowB...would help alot of people out and the data could be continusly updated.
Hey Voo Doo when u ran the 2700 4+2 T.P. packs-was it nose heavy by much? (the swist)

Cheers ladz!!! My batt probs are soloved! Found a 70c 2700mah 6S that will fit perfect!! WRAPPED AS!!
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Last edited by blitzu; Mar 05, 2013 at 02:28 AM.
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Old Mar 05, 2013, 06:12 PM
Registered User
Hemet California
Joined Jul 2009
809 Posts
Does anybody make a 7/10 folder? I have a little project I want to try one on..

DE
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Old Mar 05, 2013, 09:43 PM
Drinks Day Old Expired Milk
VooDoo Child's Avatar
United States, OR, Portland
Joined Aug 2010
2,834 Posts
Quote:
Originally Posted by D.English View Post
Does anybody make a 7/10 folder? I have a little project I want to try one on..

DE
Downunderpilot makes a great pair,i have been using them for a long time now....send him a pm.
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Old Mar 10, 2013, 06:26 PM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,391 Posts
DUP 6x10 and 6.25x11's on 32mm RFM spinner ( giving 5.5" and 5.75" diameters)

6x10 on this spinner is 5.5x9.16
6.25x11 on this spinner is 5.75x10.12

Scorpion 3026-1400
CC125 5 degrees timing in outrunner mode
5S 1800 65C turdigies

Tested kV - 1428

6x10 DUP Folders -
25531 rpm (222mph pitch speed )
1115W
56.77A
19.5V

6.25x11 Folders -
23255 (223mph pitch speed )
1441W
77.6A
18.58V

Freeky how the pitch speeds are the same

Both spin smoothly, nicely balanced, sound good statically. Had some odd issues with the 6.25x11's. Rpm was fluctuating a little while moving throttle around. Dunno what that is, could be timing thing. Its possible the long motor wires are causing the esc a lil trouble.

To give you an idea of the loads, APC sport prop comparison -

http://www.rcgroups.com/forums/showp...93&postcount=2


The eagletree fits in the fuselage, so Ill add to this with inflight numbers
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Last edited by jackosmeister; Mar 12, 2013 at 03:23 AM. Reason: Corrected with calced pitch
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Old Mar 10, 2013, 07:04 PM
2012 NZ Speedcup - 231 MPH
DownUnderPilot's Avatar
New Zealand, Tasman, Richmond
Joined Mar 2006
2,072 Posts
Good pitch speeds there! Although the calculated speed will be a bit out since they are turning on smaller hubs (can never remember which way it makes it go - up or down)...

Probably a case of seeing how they unload in the air, the bigger prop is probably going to give more thrust which could be handy....
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Old Mar 10, 2013, 07:13 PM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,391 Posts
Yup it does drop pitch, I cant remember the link to the formula though. Considering this is supposed to be an F5D setup a bit less pitchspeed is probably a good thing.

6S+ will be thrown in for ampfest. Go fast or go boom (or fizzle pop!)
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Old Mar 10, 2013, 11:48 PM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
970 Posts
Quote:
Originally Posted by ApexAero View Post
SB or DUP, would either of you undertake the making of a Graupner 3x3 or 4x3 in carbon?
lol, I know its tiny but I'm tired of breaking a 6 dollar prop each flight! I just referbed my tiny SFW wing using an old Razor H2 heli motor with new ceramic bearings! At 27" wing it goes like stink! Need a 10-12a esc now! It'll turn a 3x3 @ 38k and the 4x3 @ 33.5k
Apex I just did a 3.9x4.1 in carbon. If you're interested I can send it to you. It's a one off though!
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Old Mar 12, 2013, 03:24 AM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,391 Posts
Edited DUP prop testing post with recalced pitches for smaller than designed centre peice.

RFM 32mm spinner
6x10=5.5x9.16
6.25x11=5.75x10.12
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Old Mar 12, 2013, 03:48 AM
Aka: Tom Jenkins
ApexAero's Avatar
Palm Beach County, Fl.
Joined Aug 2008
4,501 Posts
Thanks SB I don't think the little motor can take the heat.
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Old Mar 12, 2013, 04:57 AM
I am actually really slow
SlowBarless's Avatar
Brisbane
Joined Jun 2008
970 Posts
Quote:
Originally Posted by ApexAero View Post
Thanks SB I don't think the little motor can take the heat.
Its probably to chunky for your setup anyway. I was running 1.5kw through it the other day! Lot of power through a tiny prop!

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Old Mar 15, 2013, 04:09 AM
Quest for Speed!!!
Mike_eee's Avatar
Fremont,CA
Joined Aug 2005
1,190 Posts
anyone make a good 4.1 x 4.1 prop for my mega 16/15/2...i tried several apc,, vibrates at the top rpm like crazy....pm me if u have any.
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Old Mar 15, 2013, 04:23 AM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,391 Posts
Get a good balancer
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Old Mar 15, 2013, 04:42 AM
Registered User
feefo's Avatar
Staffs, UK
Joined Apr 2009
3,647 Posts
Quote:
Originally Posted by Mike_eee View Post
anyone make a good 4.1 x 4.1 prop for my mega 16/15/2...i tried several apc,, vibrates at the top rpm like crazy....pm me if u have any.
It could be your spinner OOB too (if you're using one).
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