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Old 10-08-2011, 12:25 PM   #1 (permalink)
cvd
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Default Trex 500 in Scale Hughes 500E

Standaard Trex 500 motor en Esc.
5S lipo 4000-40C
Pinion 14T









After some hoovering and forward flying motor and Esc
getting verry hot.
I thinking installing a motor fan.



Any one tips to lower the temp. with this setup?

http://www.modelbouwforum.nl/forums/...erslag-je.html

Last edited by cvd; 10-08-2011 at 03:03 PM..
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Old 10-08-2011, 01:51 PM   #2 (permalink)
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i fitted semi symetrical blades seemed to help my motor temp.
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Old 10-08-2011, 02:01 PM   #3 (permalink)
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Yep, I thinking installing some assymetrischle blades to.

http://www.spinblades.com/de/spinbla...-blaetter.html

Is there a big difference in temp. ?

Thanks for the tip.

http://s304.photobucket.com/albums/n...view=slideshow
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Old 10-08-2011, 05:41 PM   #4 (permalink)
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nt huge difference but every bit help, those spin blades are also wider chord than 3d blades = more lift i love my set heli seems more stable as a bonus
Asymmetrical rotor blades are increasing the efficiency considerably. Due to the asymmetrical profile the lift is increased and the drag reduced, therefore the flight endurance is increased up to 100 %. The use of these blades is recommended to pilots not interested in 3 D flights, for pilots who just want to have fun and for beginners. Asymmetrical rotor blades for pilots, who are interested in long endurance flights.Do you like to increase your flight endurance considerably? In this case we recommend the use our asymmetrical rotor blades. The reduced drag and the increased lift allows to reduce the rpm nearly by half, thus nearly doubles the flight endurance.
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Old 10-09-2011, 12:06 AM   #5 (permalink)
 

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Going with a lower Kv motor and lower tooth pinion gear will help the most, a standard motor and a 14t pinion are giveing you to high a headspeed for scale flying.
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Old 10-09-2011, 06:40 AM   #6 (permalink)
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I try a 13 T pinion. But a lower Kv motor for the Trex 500 is difficult to find.
Someone with examples for a different motor lower than 1600Kv ?

What headspeed do you recommend?
I have some 2430rpm with current setup.

I calculate my RPM with HSCalc (head speed calculator v1.0.10)
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Old 10-09-2011, 08:38 AM   #7 (permalink)
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Is that something ?

http://www.hobbypartz.com/75m62-heli...25-1500kv.html
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Old 10-09-2011, 12:51 PM   #8 (permalink)
 

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Here is a Scorpion 1000Kv motor I am running on my 500 with very good results.http://www.scaleflying.com/Scorpion-...000_p_556.html
My HS is right at 1500 with a 5-blade head and scale SM blades.
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Old 10-09-2011, 02:16 PM   #9 (permalink)
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What lipo's and pinion are you using with this motor?
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Old 10-09-2011, 02:33 PM   #10 (permalink)
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where is your esc mounted? i have same fuse but in 450 size. stays cool. i mounted esc just under left side rear window. gets lots of air. ir esc gets hot so will motor. i looked at your buld thread and it appears you have lots of room to remount your esc where it will get lots of cooling air. try it and see.
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Old 10-09-2011, 03:06 PM   #11 (permalink)
 

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6s 3000mah 20C Blue Lipo pack.
12t pinion at 90% throttle curve.
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Old 10-09-2011, 03:23 PM   #12 (permalink)
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Quote:
Originally Posted by drakonis View Post
where is your esc mounted? i have same fuse but in 450 size. stays cool. i mounted esc just under left side rear window. gets lots of air. ir esc gets hot so will motor. i looked at your buld thread and it appears you have lots of room to remount your esc where it will get lots of cooling air. try it and see.
Have the same setup as the original trex ESP.
Esc under battery try.
You have a point there, i will re-organise my electronic setup,
And get more air to the esc and motor (motor-fan):
http://www.benl.ebay.be/itm/540-550-...item3cb93df2fe

So i have already four points.

°Pinion (12 or 13T).
°Motor (lower Kv) Still looking for the right one.
°Blades (Spin)
°And reorganise electronic setup
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Old 10-09-2011, 03:27 PM   #13 (permalink)
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Quote:
Originally Posted by Cap231ex View Post
6s 3000mah 20C Blue Lipo pack.
12t pinion at 90% throttle curve.
Thx.
You have a low C-rate.
My lipo's (40C) are the only thing that stay cool.
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Old 10-09-2011, 03:30 PM   #14 (permalink)
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Quote:
Originally Posted by Cap231ex View Post
Here is a Scorpion 1000Kv motor I am running on my 500 with very good results.http://www.scaleflying.com/Scorpion-...000_p_556.html
My HS is right at 1500 with a 5-blade head and scale SM blades.
What would be a good HS with a 2 blade setup?
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Old 10-09-2011, 04:52 PM   #15 (permalink)
 

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Iyeah I've found that for my setups I don't need a high C rate and the quality of the battery is the biggest difference. I only have a few Turnigy and Zippy batteries left as thing just don't have the quality of the Blue Lipo packs.

On a 2-blade head with 3D standard blades the lowest HS you will be able to go with will be around 1900-2000 I would guess, 500's are prone to the bobbs at low HS.
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Old 10-10-2011, 12:06 PM   #16 (permalink)
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That's about 12T pinion with 1600Kv / 5S Lipo's
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