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Old Feb 04, 2013, 08:48 PM
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Eugene, Oregon
Joined Apr 2009
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not gws, Hobbyking multirotor (slowfly multirotor prop) 3 blade 5045 should be fine on slow fly Wright
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html

maybe they wont work but I'll try them

EDIT: read ALOT on the theory of multirotor vs airplane props wether or not this would work prior to purchase, good chance it will in the right plane. Now with a better lower kv motor fingers crossed...

Originally purchased these props and many other small counter rotating props couple weeks ago, love diff thrust and need many cw/ccw props.
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Last edited by elvill; Feb 04, 2013 at 09:12 PM.
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Old Feb 04, 2013, 09:13 PM
Master of Micro Modding
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Australia, SA, Burra
Joined Sep 2011
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Quote:
Originally Posted by elvill View Post
not gws, Hobbyking multirotor (slowfly multirotor prop) 3 blade 5045 should be fine on slow fly Wright
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html
http://www.hobbyking.com/hobbyking/s...Pair_Bag_.html

maybe they wont work but I'll try them
Is this the plane you're speaking of:



If so are you going to utilise the gear box:



If you are I'd go for a larger 2s setup if I were you, like this one http://www.hobbyking.com/hobbyking/s...er_2900kv.html

with this esc: http://www.hobbyking.com/hobbyking/s...k_10A_ESC.html

You'd have the option of going for a 2-3s then
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Old Feb 04, 2013, 09:16 PM
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UNGN's Avatar
Southlake, TX
Joined Jan 2008
7,327 Posts
Quote:
Originally Posted by valiantGLX View Post
I dont think so, even making the same amount of thrust as the stocker is pushing this little BL on 2s.

While my tests aren't 100% accurate you get a good idea whats going on and whats possible.

Here's the stock test, note that the eflite 2 blade and the 5030 prop make the same amount of thrust (39g):

http://www.youtube.com/watch?v=O50SKXvt8Bw

Now here's the same test with the BL motor on 2s, at 1/2 throttle it makes the same amount of thrust as the stock motor. I can then push it up to 63g but for no more than a few seconds:

http://www.youtube.com/watch?v=pcyRh1DkEPY
Thrust per amp is what I'm talking about. What is the Amp Draw of the geared brushless on 2S throttled to 45g or 50g of thrust. If its 1.2g, that is WAY less than the brushed motor making the same thrust.... so you can use a 2S 160 battery instead of a 1S 260 and it will make 45g of thrust for longer.

Don't take it to 60g of thrust and it won't get too hot.
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Old Feb 04, 2013, 09:19 PM
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Eugene, Oregon
Joined Apr 2009
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~Anyone hook up a Trifan Turboprop (Plantraco or SnapFly) to this bl motor on 2S yet?~

This is the largest prop the 8mm brushed motor can run DD safely/wot (someone tell me otherwise) And if BL motor doesn't get hot we could get good thrust.
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Old Feb 04, 2013, 09:24 PM
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Eugene, Oregon
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Quote:
Originally Posted by valiantGLX View Post
Is this the plane you're speaking of:

You'd have the option of going for a 2-3s then
yes, thats why I bought the props little bit ago, also bought more 10g 5g motors + esc for the Wright and b/c these lite weight power combos are tops!

got a couple smaller wrights that could go DD 8mm bl with turboprop too

Edit: Guess I really like the idea of having a BL motor the size of standard brushed 8mm. I have dozen paired small cw/ccw props, only a matter of time to see which works best on 2s.

EDit: Not going to use gearbox, nor moving control surfaces. DIFF thrust, wanted to do a low cost servo as esc option but micro brushless is cool too. Hope to optimize HK Wright dual bl combos with 3bladed 5045, should be pretty unique 1S, classic with thread detail and ultimate for me b/c diff thrust, small lite slow wright etc.
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Last edited by elvill; Feb 05, 2013 at 07:38 AM.
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Old Feb 05, 2013, 12:25 PM
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Quote:
Originally Posted by valiantGLX View Post
IDK! 2s ESCs in general have built in BECs adding to the weight, maybe if there were plain 2s ESCs the weight would be similar, but you need a BEC for the UM platform.
Here is a ESC for 1 and 2 Cell weight 0,7g Current 7A
http://www.yge.de/artikel.php?search=yge7s
Quote:
Yeah sure you could half the lipo capacity so there is no weight difference. However there is still no real performance increase over the stock 1s setup, and again it will negatively impact the performance in regards to flight times.
Flightime are the same or better if the efficiency is the same or better.
The stock brushed motor draw up to 1,9A and a efficient 2S system should under 1A for the same thrust.
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Old Feb 05, 2013, 02:00 PM
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Southlake, TX
Joined Jan 2008
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New Plan:

Put a 10 or 11 tooth pinion on the motor, then try 1S again.

This would change the gear ratio to 3.6:1 or 3.3:1 from 4:1

The proper gear spacing/mesh from the larger pinion can be maintained by removing tape from the bottom of the motor and putting it on the top.
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Old Feb 05, 2013, 03:06 PM
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Denmark, Central Denmark Region, Silkeborg
Joined Nov 2009
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That sounds good!

Can't wait to hear about the results!!

"Bonne merde" as said in french (it's a way of wishing 'good l*ck', but without actually saying it. It's some old superstition; that if pronounced, it will actually bring bad luck, much used before going on stage)
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Old Feb 05, 2013, 03:35 PM
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Eugene, Oregon
Joined Apr 2009
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Hi Valiant,
you have the TTprop (see it in your pics) Have you tried Direct Drive on 2S yet? brushed doesn't get hot so assume bl wont...
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Old Feb 05, 2013, 07:34 PM
Master of Micro Modding
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Australia, SA, Burra
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Quote:
Originally Posted by microheli View Post
Here is a ESC for 1 and 2 Cell weight 0,7g Current 7A
http://www.yge.de/artikel.php?search=yge7s

Flightime are the same or better if the efficiency is the same or better.
The stock brushed motor draw up to 1,9A and a efficient 2S system should under 1A for the same thrust.
Yeah but it doesnt have a BEC, or at least it doesnt sount like theres one. So it wouldnt suit the ultra micro setup
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Old Feb 05, 2013, 07:35 PM
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Quote:
Originally Posted by elvill View Post
Hi Valiant,
you have the TTprop (see it in your pics) Have you tried Direct Drive on 2S yet? brushed doesn't get hot so assume bl wont...
which one it the ttprop
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Old Feb 05, 2013, 07:47 PM
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I R Irv's Avatar
United States, IL, Washington
Joined Nov 2008
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Quote:
Originally Posted by valiantGLX View Post
which one it the ttprop
Your MCPX tail rotor prop looks just like a ttprop.(tri-turbo)
TODD
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Old Feb 06, 2013, 01:06 AM
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Eugene, Oregon
Joined Apr 2009
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Quote:
Originally Posted by I R Irv View Post
Your MCPX tail rotor prop looks just like a ttprop.(tri-turbo)
TODD
Sure does look like ttprop (mybad saw through attachments tool) another safe candidate for DD, estes have smaller and larger but closest to ttprop
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Old Feb 06, 2013, 02:02 AM
Have fun
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Joined May 2007
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Guess it's not the ultimate conversion
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Old Feb 06, 2013, 05:40 PM
Exodus 4:13
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United States, FL, Davenport
Joined May 2012
9,097 Posts
I'm disappointed as well. My UM P51 motor crapped out the last few flights, it's pretty much dead. Some rotations it sticks really badly and I can hear the uneven rpm during flight. I was hoping for better results here but it looks like Mr. Babbel will be earning quite a bit of my cash for now.
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