SMALL - espritmodel.com SMALL - Telemetry SMALL - Radio
Reply
Thread Tools
Old May 10, 2009, 07:11 AM
Registered User
Frojd's Avatar
Sweden, Västra Götaland, Goteborg
Joined Aug 2005
718 Posts
the 5.5x4.5 APC-E prop is very good for parkjets I believe. The 5x5 on the other hand does not generate much thrust at all and requires a very slick airplane to work effectively.
Frojd is offline Find More Posts by Frojd
Reply With Quote
Sign up now
to remove ads between posts
Old May 11, 2009, 01:28 AM
Registered User
manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,390 Posts
Today. I wind my first Turnigy Blue Red Wonder.
16 Magnets, ABC x 4, 17 Turn 26awg. (very easy wind, 2 layer.)

GWS 9x5, 7100 rpm, 10.85V, 6.8A. 17.65oz, 63% effy.

Old Silver Wonder.
14 Magnets, 17T, 26AWG, (hard wind, 3 layers)

GWS 9x5, 7000rpm, 10.86V, 6.8A. 17.13oz, 60% effy.

Manuel V.
manuel v is offline Find More Posts by manuel v
Last edited by manuel v; May 11, 2009 at 01:47 AM.
Reply With Quote
Old May 11, 2009, 01:48 AM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
Manuel, I'm starting to think this new version really is better.


Dave
timocharis is offline Find More Posts by timocharis
Reply With Quote
Old May 11, 2009, 02:23 AM
Registered User
manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,390 Posts
But bring a crazy idea that if I encourage you to see.
Reduce the stator and the bell just to 3.5mm. and the bearing tube in half with a light base and less bulky.
The idea is to try to decrease about 8 grams and see how it works with only a 2s and kv of 1400-1500.

Loco no.

Manuel v.
manuel v is offline Find More Posts by manuel v
Last edited by manuel v; Jun 23, 2009 at 02:29 AM.
Reply With Quote
Old May 11, 2009, 05:35 AM
Registered User
Joined Aug 2007
1,508 Posts
Nice idea Manuel

An 18 gram motor , for a 2S 400 , There should be plenty of people who have the talent to separate the stator and its a cheap motor for this experiment
A nice low carbon flux ring would do good

New magnets , how thick ,,, I dont know ?
NX-687 is offline Find More Posts by NX-687
Reply With Quote
Old May 11, 2009, 10:40 PM
Usual suspect.
St. Louis MO
Joined Feb 2007
945 Posts
Quote:
Originally Posted by manuel v
Reduce the stator and the bell just to 3.5mm. and the bearing tube in half with a light base and less bulky.
I like the idea a lot. Over time I'm concluding that a thinner, larger diameter stator is the way to go on most motor sizes... the thicker stator, smaller diameter motors dont seem to shine as well for some reason - I could be wrong?
A couple of thoughts on the subject...
After cutting the tube, getting the bearing recess re-cut may be a bit tricky because of the flanged end that holds the stator - how would it fit into the chuck/collet??
The stator and bell reduction seems workable... what magnets though? GB got anything that'll fit?
dashunde is offline Find More Posts by dashunde
Reply With Quote
Old May 12, 2009, 12:56 AM
Registered User
manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,390 Posts
I have some ideas.
I will start working the engine and see what happens.
If I have any success, then I write my progress.

Manuel V.
manuel v is offline Find More Posts by manuel v
Reply With Quote
Old May 12, 2009, 10:44 PM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
32-turn Delta

Used 28awg. Weird idea: somebody likes turning an 11x4.7 with the BW, so this was one attempt (pretty good, really, and easy on the battery):

Tgy 2730 32T 28awg dLRK Delta
Kv 988 (8002/8.1v) Io = 0.35 Rm = 0.373
GWS 1147 RS Rhino 610 2S 4046 rpm @ 7.60v/6.83a
Badcock: 372 grams 13.1 oz/thrust
Drive Calc: 403 grams 14.2 oz/thrust
timocharis is offline Find More Posts by timocharis
Reply With Quote
Old May 13, 2009, 01:24 AM
Registered User
manuel v's Avatar
Mexico, BC, Mexicali
Joined Aug 2004
5,390 Posts
Dave.

Can you test with GWS 9x5 3s.
Nice wind.

Manuel V.
manuel v is offline Find More Posts by manuel v
Reply With Quote
Old May 13, 2009, 09:54 AM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
Quote:
Originally Posted by manuel v
Can you test with GWS 9x5 3s.
Oh oops! No can do; already sent it off to its new owner. Would have been a good idea though.


Dave
timocharis is offline Find More Posts by timocharis
Reply With Quote
Old May 14, 2009, 05:41 AM
Registered User
Joined Aug 2007
1,508 Posts
Dave

That will be a nice close in responsive airplane with an 11x4.7 on , I always found the big props made for a nicer hover and plane controllability as it pushes all that air over the surfaces
I had 80 Turns on one motor Classic LRK and delta, and it was nice , different
The acceleration was ballistic up to a point where the model just does not speed up any more , but the 4.7 pitch doesn't give a lot of speed as you know

By the way , everytime I see one of your winds , I want to get out my wire
NX-687 is offline Find More Posts by NX-687
Reply With Quote
Old May 14, 2009, 11:27 AM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
Quote:
Originally Posted by NX-687
That will be a nice close in responsive airplane with an 11x4.7 on
I might have to try one of these. His favorite at this point is a 17T abc Wye, which produces a shade more power than the 32T Delta dLRK. Says they're terrific on largish indoor models.

Kinda fun! Get that wire out...


Dave
timocharis is offline Find More Posts by timocharis
Reply With Quote
Old May 16, 2009, 11:12 PM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
How about a 20T ABC Delta 26awg?

For a little flash, tricolor newbie wire. This one has me sold as an outstanding two-way:

Tgy 20T 26g ABC Delta Kv 1510
2S = 1516 (12175/8.03) Io = 0.49 Rm = 0.143
3S = 1507 (17743/11.77) Io = 0.61 Rm = 0.143
GWS 8040 Hex 620 3S
10626 rpm @ 10.11v/9.56a
Badcock: 578 grams 20.4 oz/thrust 79.7% Efficient
DriveCalc: 638 grams 22.5 oz/thrust 81.9% Efficient
GWS 9050 Rhino 610 2S
7058 rpm @ 7.27v/9.63a
Badcock: 459 grams 16.2 oz/thrust 67.7% Efficient
DriveCalc: 512 grams 18.1 oz/thrust 67.5% Efficient

As usual, the 2S 9050 efficiency doesn't look all that great, but we're still looking at nearly double ounces/amps from two cells, which is nothing to sneeze at. Looks cool too!


Dave
timocharis is offline Find More Posts by timocharis
Reply With Quote
Old May 19, 2009, 11:14 AM
Flying high
billwhit's Avatar
Seattle, Wa
Joined Dec 2002
2,263 Posts
Hey guys, I have a question for you. I have just started rewinding my Blue Wonders. At this point I have two rewound motors in the air. But so far all I have done is rewind old motors I bought. I did one 11T24 and one 14T26, they seem to be working well.

Anyway, my question is about how much the magnet spacing effects performance. I bought my first Blue and Red Turnigy motor (1500kv). One thing I notice comparing it to an older Blue Wonder is that the magnet aren't put in nearly as well. this is a little disappointing as i was expecting the Turnigy motor to be higher quality. Will it make a noticeable difference? Should I try to redo them?

I did think the winding on the Turnigy was a bit neater, but then I saw another problem too. Where the wires come through the hole, they didn't bring the insulation out far enough and one is resting on the corner. I already had to redo a motor I was winding myself because the wire came across that point and shorted out...
billwhit is offline Find More Posts by billwhit
Reply With Quote
Old May 19, 2009, 12:13 PM
Dave North
timocharis's Avatar
USA, CA, San Jose
Joined Apr 2004
5,254 Posts
Bill, that's easily the worst magnet spacing I've seen on one of these. None of mine have looked even remotely like that. So I think you won the lottery in that respect.

It's not a good thing, but it's not a disaster either. It will cause an uneven cog, cost a little efficiency, and make the motor (maybe) a little noisier -- or a lot, depending on your luck. Trying to clean out and re-space may actually cause more trouble in the Y axis (radius) than it solves in the X axis, so I'd be inclined to leave them alone.

Quite a few of the 1300 models have shorted exactly where you say. This is a known and old problem, and a very good example why that approach is, well, stupid. But they still do it. Go figure!


Dave
timocharis is offline Find More Posts by timocharis
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Sold 14-turn 25awg dLRK Turnigy "Blue'n'Red Wonder" Outrunner $23 Shipped timocharis Aircraft - Electric - Power Systems (FS/W) 3 Mar 21, 2009 02:38 PM
Sold Rewound 13-turn 24awg Turnigy "Blue Wonder" Outrunner $24 Shipped timocharis Aircraft - Electric - Power Systems (FS/W) 6 Mar 08, 2009 11:37 PM
blue core stringless wonder larry g Foamies (Kits) 9 May 27, 2003 11:06 AM