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This thread is privately moderated by jrb, who may elect to delete unwanted replies.
Aug 30, 2018, 06:23 PM
Hi Body, is it the same model as in post 601? What's you power to weight ratio with that 24x10 prop? The flight time sounds wonderful, I almost got that Xpwr motor but the last minute went for Eflite. How is that XP going?
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Aug 30, 2018, 09:00 PM
"I will return" Federico
rclad's Avatar
Originally Posted by jofro
Hi Body, is it the same model as in post 601? What's you power to weight ratio with that 24x10 prop? The flight time sounds wonderful, I almost got that Xpwr motor but the last minute went for Eflite. How is that XP going?
Oops! Sorry, I forgot to edit the model before posting. The 95" Extra 330SC-E is a new electric-only airframe that just came out this year. The airframe is much lighter than the 87" Extra 300. You can see more pics of my setup and the schematic here.

Thrust to weight is about 1.8:1. Power to weight is about 252 watts/pound. Both my 87" and 95" now use the Motrolfly DM 5335. Not as much power, but it is very efficient and almost 7 oz. lighter.
Aug 31, 2018, 04:24 AM
At 16.5 kilo thrust you are laughing all the way, that's impressive for e-power. Do you think it can sustain it for a while with out overheating?
Sep 04, 2018, 02:45 AM
Successful power system in my latest "Bi" design, it works even in the light rain!
2016 1125 163048 043 (3 min 22 sec)
(Bi on grey) No idea why the vid. cut short!
Sep 06, 2018, 02:25 AM
Took some advantage of the calm weather brake before lunch with few flights. Running 23x8 prop, the motor and ESC doesn't even warm up after the flight.
2016 1127 163334 042 (5 min 31 sec)
(Extra time)
Last edited by jofro; Sep 19, 2018 at 12:22 AM.
Sep 06, 2018, 03:18 AM
Right Rudder
PittSpecial's Avatar
Originally Posted by Ron van Sommeren
Thread title, a.k.a. subject
Successful Power Systems

Again hijacking a thread.
Totally Agree Ron!

Okay guys! Lets keep it within the Format and lets not once again hijack with videos!

If you need to prove your setup, you can link the videos from another thread such as your Blog.
Oct 02, 2018, 04:03 AM
attached is more data/specifications.
Slotted 20 pole O/R
Weight - 1240 grams
Size - 88x92 mm
Kv - 180 per volt
Shaft - 10 mm
Rated to - 6000 Watts
Max/current - 150 A
Cont.current - 130 A
Recc. ESC - 160-200 A
I/ressistance - .0019 ohms
No L/current - ~6A/40V
Max. operational temp.
recommended - ~ 104 deg./Cel.
Rec. props 24x10-12, 25x10-12 - suggested not to exceed
15 second bursts @ over 150 A.
Power supply - 12S/5Ah+/30C+
Starting to really enjoy flying this power set up, yesty's footage of one of my flights.
2016 1222 161836 047 (5 min 12 sec)
(EXTRA at field)
Mar 19, 2019, 05:41 PM
Dont confuse me with the facts
What kind of timing and PWM setting do you have? Or, is typically used on larger outrunners? I have a 40% Sbach 15000-20000 Watt I am trying to program.

Mar 20, 2019, 03:06 AM
I use low for both, timing and PWM freq.
Sep 01, 2019, 03:38 AM
Another brilliant power set up in my scratch built "JF-BI", running on Eflite32, off 4S, so far tested at least half a doz. various props , today flying on 15x4 carbon fiber, so far the best combo.
Sep 16, 2019, 01:57 PM
Registered User
Aeroplayin's Avatar
Here's another StinGR setup on a 105" 28.5 pound Skywing Edge 540.

Custom wound HKIII-5035-458Kv
14S 8200mAh (51.8v)
28x12 LF Mejzlik
YGE 320A

This is the equivalent of 11.25 HP at the shaft.

Skywing Edge 105 V2, Electric Flight, 14S 8200, StinGR (6 min 0 sec)
Nov 12, 2019, 03:00 PM
Registered User
jims123's Avatar

What's a good replacement for this little C-10 Motor

I have this 23 inch wide Delta Wing called a DW Rainbow I got for use as a trainer

which flies Ok on its normal setup but is very under powered, and the C-10 motors run hot and I've had two of them fail so far.

The Wing's AUW is 165g when running with a 450mah 3 Cell that's 40g . it has a 10 amp ESC and I'm looking for a replacement motor with higher KV that can run faster and cooler with a small prop ( like a 5030) that will fit in this wing.. but more reliably than this C-10 does and that has a similar mounting which screws in to a firewall from the motor / front side of the thin plywood base ( cause I can't access the rear side. I've looked at the e-Flight Park 180 but its a little too small.. and the Park 250 might be perfect but will not work with 3 Cell lipos..only 2 cell

Any suggestions for something similar that can be front-side firewall mounted on a very light wing like this and run in 3cel 450 mah batteries under say 12 amps max?

Any thoughts?
Last edited by jims123; Nov 13, 2019 at 12:41 AM.
Jan 13, 2020, 03:07 PM
Registered User
I'm thinking of rebuilding a Marston Pterodactyl from a twin brushless prop power to one Ducted fan. I was wondering what size fan I need. The bird would weigh about 25 ounces.
Jan 13, 2020, 03:10 PM
Registered User
Picture of Marston Pterodactyl to be converted to Ducted Fan

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