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Mar 18, 2017, 05:45 AM
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Discussion

motors used on 2 mt sailplanes


which are the motors you use on your 2 meters sailplanes?
diameter, lenght, weight-part numbers and sources please.
what props to match?
Last edited by phil alvirez; Mar 18, 2017 at 12:14 PM.
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Mar 18, 2017, 07:18 AM
Windy City Flyer
Brian Kloft's Avatar
Well I can only comment on what I am using, as I will not be flying these plane/motor combos till spring.

Here is what I am using in a Slite: Hacker A10-7L + 4,4:1

I am using another motor in a Fresh: HCS 380 from Icare.

The HCS is planned to provide service as a sport flyer.. easy climb and NOT for competition. It is a motor in a spinner. It is a light duty motor for the lightest of planes. The Hacker should be much more robust and has a gearbox attached.

I am sure there will be other that will chime in with actual experience and performance ratings. waiting with curiosity myself!

Brian
Mar 18, 2017, 12:23 PM
Registered User

what i use


i am using this in my 2 meters sailplanes and get a 200 meters (640 ft) climb in 30 seconds.
https://hobbyking.com/en_us/ntm-prop...10kv-350w.html
Last edited by phil alvirez; Mar 18, 2017 at 02:49 PM.
Mar 18, 2017, 12:37 PM
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f4you's Avatar
+1 Phil
That plus a 3 cell pack, 11 x 7 folder. VERY happy with this combo.
Mar 18, 2017, 12:54 PM
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Randy Reynolds's Avatar
Wrong link?
Mar 18, 2017, 01:16 PM
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Quote:
Originally Posted by Randy Reynolds
Wrong link?
no, thats right, believe it or not.

https://hobbyking.com/en_us/ntm-prop...10kv-350w.html

i have some 10 and just ordered 2 more, as are on sale now.
Last edited by phil alvirez; Mar 18, 2017 at 02:42 PM.
Mar 18, 2017, 05:08 PM
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craigrrr's Avatar
I am wondering the AUW of your 2 meter planes. This MTM motor weighs 117 grams. Maybe you could go with something smaller like a KEDA28-39 (used to be called a KDA20-22L) outrunner. It isn't exactly light weight (87 grams), but it is over an ounce lighter than the MTM.

The KDA20-22L, With a good 1300 3s LiPo, CAM 10-6 prop yields 24.9 amps, 296 watts.
Kv=1000, 28mm dia x 39mm long, 3mm shaft. It says it is rated at 200 peak watts, 10 peak amps; but this is a mistake. Peak amps used to be listed as and should be 25. This is a rock solid motor; I have had zero failures and have owned lots of them.
It costs $10.

Craig
Mar 18, 2017, 05:36 PM
Registered User

light or heavy


thank you very much for your advice.
i have 2 basic groups of 2 mt sailplanes:
1 that uses the 35-36 motor and the other that use the 28-36.
the 1s with the 35 are around 850 grams auw, and the others are about 650 grams.
same wing and tail.
the 28-36 is around same weight of the 1 you suggest, and is more powerful. see:
https://hobbyking.com/en_us/ntm-prop...ess-motor.html
due to the wing loading, it is for calm weather and does fine with it.
the others with the 35 are for more wind and have more penetration due to the more weight.
in both cases i thing that the motors am using do the job, as the climb is all that i dream of.
but still there are more possibilities. depends of the kind of plane design.
thanks again for your cooperation.
Mar 18, 2017, 06:32 PM
Boar? I'm a Thermal Pig!
Batmanwpg's Avatar
Eflite 450 with 10x6 folder, 3S 1300 Mah no problem 23 seconds to 150 meters
I will be trying 11x6 this year
Mar 18, 2017, 07:08 PM
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John O'Sullivan's Avatar
For 16-17 ounce models (equivalent to RES 2 metre) a 150 watt motor is adequate. I notice you are flying at weights up to 850 gm and these are a different kettle of fish.
My recently maidened MAYFLY is based on my earlier Minifex design and adapted to current RES2m specs.

Here are some stats on it including climb rate and other information.

I am just finishing the wings for the sailplane version but the electric has been out a few times and is impressive. I will be making full size plans and instructions available but have not decided yet whether i will make kits.
Mar 18, 2017, 11:49 PM
Registered User

details


" For 16-17 ounce models (equivalent to RES 2 metre) a 150 watt motor is adequate. I notice you are flying at weights up to 850 gm and these are a different kettle of fish."
just to clarify:
i have 2 kinds of e sailplanes: 1 that weigh 650 gr and have the 28-36, and another that have the 35-36 and weigh 850 gr.
the wing area of both is 613 sq in, and both do fine with those motors.
Mar 19, 2017, 02:48 AM
Registered User
Skybench 2m Li'l Bird - https://hobbyking.com/en_us/turnigy2...er-1000kv.html
Hoellein RESoulution - https://hobbyking.com/en_us/turnigy-...ner-890kv.html

Pures by Seta Modelltechnik - modified with new shaft - https://hobbyking.com/en_us/c2230-mi...780kv-27g.html
Mar 19, 2017, 05:39 AM
Registered User

more of yours


thank you guys for all the advice for my planes.
i taked about them to show what i would like to hear of yours.
now, back to the idea of this thread:
has any1 something to tell about your own planes?

thanks
Mar 19, 2017, 06:58 AM
Registered User
Alienmenacet54's Avatar
Hi;
I am putting this motor in a friend's plane that I am building for him.
https://hobbyking.com/en_us/d2830-11...ess-motor.html. It is a Great Planes "Spectra". With a 30amp ESC, and probably a 11x6 folding prop.

I have a Spectra myself that I put in a Glider Drive ( https://hobbyking.com/en_us/turnigy-...3-5-960kv.html )that I replaced the brushed motor that came with it. Mine was a ARF kit. So, it was built heavy to start with. It flies great.
This is my Spectra in flight.
Mar 19, 2017, 10:26 AM
Registered User

weight


Quote:
Originally Posted by Alienmenacet54
Hi;

I have a Spectra myself that I put in a Glider Drive ( https://hobbyking.com/en_us/turnigy-...3-5-960kv.html )that I replaced the brushed motor that came with it. Mine was a ARF kit. So, it was built heavy to start with. It flies great.
This is my Spectra in flight.
great input. thanks.
could you please confirm the weight of the 3850 motor? specs show unit weight 142 g and then weight 213 g. which 1 is the real?
thanks.


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