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Old Jan 06, 2013, 11:56 AM
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Canada, ON, Hamilton
Joined Oct 2005
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Discussion
Brushless electric motors for selected old timers

Brushless electric motors for selected old timers and smaller models.

See also:
http://www.rcgroups.com/forums/showthread.php?t=966298
Motor Data - test bench data for several hundred brushless motors.




As the title suggests, what BL motor(s) are you using in your model?

Yes, there are many tables and spread sheets for determining what motor goes with what model, prop to use, power, and all that great information, but not for a lot of these old timers shown on this thread.

You modelers have built excellent models and worked out the best combinations of BL power to get them to fly nicely. So, rather than the rest of us “re-inventing” the wheel, why not table and provide the information that you have found works best.

For starters how about these parameters?

Model
Weight
Wing area

BL motor
Size
Kv
Prop

ESC, amps

Battery used

Suggestions?
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Last edited by JohnAV8R; Feb 18, 2013 at 06:04 PM. Reason: added link to motor data
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Old Jan 06, 2013, 11:57 AM
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Canada, ON, Hamilton
Joined Oct 2005
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Brushless electric motors for selected old timers

1.) Miss Delaware, with video, post #6

2.) Dallaire Sportster, post #7
Converted .40 diesel to electric

3.) Champion, post #9
Large model at 8.5 lbs, WS 108”

4.) Halfax Spartan, post #13
Auw 36 oz, Turnigy BL 260 w with 10x4

5.) RimFire 200, small model less than 7 oz, post #15

6.) Flair Junior 60, similar in size to the Halifax Spartan and Simplex.
see post #16.

Graham provides the following info:
The Flair is equipped with an Axi 2820/10, Jeti Eco 40 Esc and a 3S 2,300 LiFe battery which gives about 10 minutes flight with an APC 12x6 Electric propeller.
My Ben Buckle Southerner 60 has an exactly identical power train, but is waiting for suitable weather for the maiden flight.

post #31 Emax brushless BL2826/06 950 kva

post #32
Turnigy 2830

post#33
BRC A2208-14T 1450 Kv

post #37, all data for
http://www.rcgroups.com/forums/showthread.php?t=2170922

Hyper Speed 400 (brushed) geared 2.33:1 is used with this model -

SOPWITH TRIPLANE
Sopwith Triplane (all 3) 34"
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Last edited by JohnAV8R; May 23, 2014 at 10:35 AM. Reason: added data
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Old Jan 06, 2013, 12:49 PM
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South-west France
Joined Sep 2007
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Sounds like an excellent idea John - sometimes a pinch of practical experience is worth a pound of theory. I'll put a table together for my models, which are mostly smallish. I'll need to re-run watt meter tests on a few of them as a number have had prop changes since I did the original set-up.
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Old Jan 06, 2013, 09:21 PM
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Looks Fantastic!!! there are too many engines around, China made as many models as Chinese people, hard to chose one...
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Old Jan 06, 2013, 09:22 PM
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What about a link of the motor?
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Old Jan 07, 2013, 12:21 AM
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Model -Miss Delaware - Steve Kowalik 1936
Weight-4lbs
Wing area-996
W.S-86"

BL motor-Rimfire
Size-3548
Kv-1300
Prop-Xoar 13 x 4
ESC, amps-80
Watts @ WOT-650
Battery used-2 2250 3S 50C lipo parallel



1936 Miss Delaware taking off (0 min 26 sec)
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Old Jan 07, 2013, 08:09 PM
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Albion Park Rail Aus
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Dallaire Sportster

Model -Dallaire Sportster - 1936

Weight - 71 oz

Wing area - 1360 sq in

BL motor - HK 3548 - 850

Kv - 850

Prop - 12x6 - for E Texaco, 14x6 for HL

ESC, amps ESC - HK 100 amp ESC, texaco 38 amps, HL 56 amps

(HL - Electric height limited event in Australia - 200m)

Alex

Battery used - 3S 1600mah texaco, HK 3S 3000mah for HL

Electrification of a prior diesel model which used an Irvine 40 on a 16x4 prop
Nice sedate take off with 12x6 a a much more invigorated one with the larger prop.
lack of ether supplies necessitated the electrification.
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Last edited by Alex VK2KR; Jan 07, 2013 at 08:13 PM. Reason: HL explanation
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Old Jan 07, 2013, 08:27 PM
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Thanks Leadchucker and Alex. We’re off to a start.
John
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Old Jan 08, 2013, 10:12 AM
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Model Name - Champion
Designer - Ben Shereshaw 1937
Weight - 8.5lbs
Wing area - 1500 sq in
W.S - 108"

Motor - ExceedRC 5055 780Kv
Prop - APC 14x7
ESC - Turnigy 80A
850 Watts @ WOT
Battery - LiPo 4S 3500 to 4500mah

20~35minutes of leisurely flying
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Last edited by pomroyj; Jan 08, 2013 at 01:16 PM.
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Old Jan 08, 2013, 11:07 AM
Experienced Balsa Mangler
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Quote:
Originally Posted by pomroyj View Post
Model Name - Champion
Designer - Ben Shereshaw 1937
Weight - 8.5lbs
Wing area - 1500 sq in
W.S - 108"

Motor - ExceedRC 5055 780Kv
Prop - APC 14x7
ESC - Turnigy 80A
Watts @ WOT-850
Battery - LiPo 4S 3500 to 4500mah

20~35minutes of leisurely flying
Oh, thanks for this one! This looks great for the (slightly smaller) Cloud Cruiser [aka KK Falcon], too.
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Old Jan 08, 2013, 01:19 PM
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Quote:
Originally Posted by Leadchucker View Post
Model -Miss Delaware - Steve Kowalik 1936
Weight-4lbs
Wing area-996
W.S-86"

BL motor-Rimfire
Size-3548
Kv-1300
Prop-Xoar 13 x 4
ESC, amps-80
Watts @ WOT-650
Battery used-2 2250 3S 50C lipo parallel

http://vimeo.com/13695364
Hi Lead - Boy, that gets up there in a hurry

Thanks for sharing, John
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Old Jan 08, 2013, 05:20 PM
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Does anyone have a proven set-up for the 60" Simplex designed by Paul Plecan? Thank you in advance.

Greg
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Old Jan 09, 2013, 03:42 AM
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Joined Sep 2007
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Hi Greg

Can't offer anything on the Simplex, but I have a 60 inch Halfax Spartan which must be very similar.

Built from an old Cambrian kit for the John Venti modified version of the original 1945 design. Power train; Turnigy 300 watt outrunner, Turnigy 35 amp ESC, 3S 2200 lipo. Radio: old Futaba Challenger 35 MHz Rx, two 15 gram JR servos. Covering: Esaki jap tissue and dope over 10 micron mylar. AUW 36 ounces. Wing loading 12 oz/sq. ft. Motor is deliberately under-propped (10 x 4) and produces 260 watts at full power, power loading 105 watts per pound.

It will take off, even from my rough grass in 3 metres and hold a 60 degree climb out with ease reaching visibility limit in about 45 seconds. Normal flying is at about one third throttle, hence the long duration with flights averaging 30 minutes without lift.
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Old Jan 09, 2013, 09:47 AM
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Quote:
Originally Posted by Greg Knipp View Post
Does anyone have a proven set-up for the 60" Simplex designed by Paul Plecan? Thank you in advance.

Greg
Greg - The setup from Sundancer for his 60" OT bird is a great starting point. If you find changes to duration or thrust are desired after you complete your Simplex, these can easily be modified. For thrust changes, prop and/or LiPo cell count will provide alot of adjustment. For duration, LiPos with higher or lower capacity. Great thing about BL electric vs. glow/gas motors is BLMs have a very wide power band (i.e. can operate at design RPM over a wide range of props and/or RPM can be changed via bat voltage)
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Last edited by pomroyj; Jan 31, 2013 at 09:39 AM.
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Old Jan 31, 2013, 09:27 AM
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RIMFIRE 200 may be of interest for small models weighing less than 7 oz.

Small brushless motors such as the RIMFIRE 200 may be of interest for small models weighing less than 7 oz.

I wanted something for an indoor model, so this is where I got my little BL.

http://www3.towerhobbies.com/cgi-bin...?&I=LXAETX&P=7

Designed for Sport airplanes up to 6.2oz (177g) and 3D airplanes up
to 3.9oz (110g)
Ideal for use with 6A Brushless ESC's, 7.4v LiPo packs and 7x3.5
GWS electric props
SPECS: Motor Diameter: 0.71" (18mm)
Overall Length: 0.74" (18.8mm)
Kv: 2400
Burst Watts: 47 watts
Weight: 0.38oz (10.7g) motor only, 0.44oz (12.4g) motor, mount &
prop adapter
Shaft Diameter: 0.079" (2.0mm)
Input Voltage: 7.4v (2S LiPo)
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