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500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


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Old 06-08-2013, 09:38 PM   #1 (permalink)
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Default Full Size Rudder Servo in Frame Mod - With Pics

I have finally got around to cutting out an opening in the frame of my 500 ESP to fit in a full size tail servo and CF rod. It was not easy, but I got er done. I took balls to start chopping but here it is...

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Chop chop! Had to dremel away some frame and use the full size 600 tail bracket.
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Had to dremel the boom mount to get the servo in the right position. Had to be careful to get the servo level and far enough in for the rod's size. I used the Align rod for the pro.
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After fighting to get it lined up just right, I epoxied the servo frame into position. I must of disassembled and reassembled 15 times to get it perfect.
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It was a tight fit, but it all worked out in the end better than expected. Not a mm to spare.
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The tail now has no bounce back with quick rudder stops. As good as my Gyro is, I could never get the tail to feel equal with hard stops left vs. right with the stock rod. Now, with the CF tail rod it feels great. I highly recommend this mod. I was also able to remove weight!!!

A tribute the the Dremel!
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Hirobo Evo .50/Futaba 9C/OS 50 Hyper & Hatori/Radix/GV1/GY401&9254/9252s/Arizona Heli Canopy
Trex 500 FBL/Futaba 8FGS/CGY750/CC ICE 75 & Scorp 1400 16T/Radix/9650s/9256
Trex 450 Pro/Futaba 8FGS/450M 14T/TP Blades/ 3156s/ Futaba GY520&9257
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Old 06-09-2013, 06:59 AM   #2 (permalink)
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That's nice! How this mod affected your COG?
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Old 06-09-2013, 10:54 AM   #3 (permalink)
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The CG moved forward a little. Now I need to move my Lipo packs aft a little to balance on the main shaft. I also installed the CF boom and CF push rod, so I'm not sure what changes really had the most effect. Got rid of the $10 metal tail servo boom mounts too. I did not weigh anything to see what was lighter.

I also recently installed the 500 Pro OWB which is lighter than the ESP version and went back to my lighter stock canopy and lightened skids after this mod. So who knows?

All I know is I'm happy to be able to shift the lipos and tail servo towards the center of the heli. It's really starting to fly light for an ESP. I should weigh it.

I'm also happy that the annoying bounce-back with hard left rudder stops is gone due to the CF push rod.
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Hirobo Evo .50/Futaba 9C/OS 50 Hyper & Hatori/Radix/GV1/GY401&9254/9252s/Arizona Heli Canopy
Trex 500 FBL/Futaba 8FGS/CGY750/CC ICE 75 & Scorp 1400 16T/Radix/9650s/9256
Trex 450 Pro/Futaba 8FGS/450M 14T/TP Blades/ 3156s/ Futaba GY520&9257
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Old 06-09-2013, 01:03 PM   #4 (permalink)
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Default Full Size Rudder Servo in Frame Mod - With Pics

Much cleaner look than having it mounted on the tail.
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Hirobo Evo .50/Futaba 9C/OS 50 Hyper & Hatori/Radix/GV1/GY401&9254/9252s/Arizona Heli Canopy
Trex 500 FBL/Futaba 8FGS/CGY750/CC ICE 75 & Scorp 1400 16T/Radix/9650s/9256
Trex 450 Pro/Futaba 8FGS/450M 14T/TP Blades/ 3156s/ Futaba GY520&9257
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