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700 Class Electric Helicopters 700 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar. |
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02-16-2011, 11:35 AM | #1 (permalink) | ||
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Join Date: Jul 2009
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using MD600 helical 110 M1 main gear
check this videos...the 110T M1 main gear sound is more silent...
[ame]http://www.youtube.com/watch?v=skiuQ6abbNw&feature=player_embedded[/ame] h
[ame]http://www.youtube.com/watch?v=22SBk5Oxu8w&feature=player[/ame] |
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02-16-2011, 02:28 PM | #2 (permalink) |
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Where are these main gears sold?
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Just another crappy day in Paradise.... Aloha! |
02-16-2011, 07:03 PM | #3 (permalink) |
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Join Date: May 2006
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Why not use the align slant cut gears, which seem to be holding up very well ?
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02-16-2011, 07:56 PM | #4 (permalink) |
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The herring bone design is stronger, quieter and doesn't put any axial loads on the motor bearings.
Mikado has been using this proven design for a while now.
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Just another crappy day in Paradise.... Aloha! |
02-17-2011, 03:38 AM | #5 (permalink) |
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Join Date: Mar 2008
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Found this in another thread
herringbone main gear $10 http://www.topshop.com.tw/md-rc-en/p...1-74F015BA80DE 12T 6mm pinion $16 http://www.topshop.com.tw/md-rc-en/p...5-26DA86032CFC
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Trex 450 Pro Stretch Neu Scorp 1630, 8s, CC30HV. Mini V Trex 700 DFC V-bar |
02-17-2011, 09:53 AM | #6 (permalink) | |
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Join Date: May 2006
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Quote:
But something that's critical with the herringbone pattern is gear alignment and vertical runout in the main gear. The 700e strips gears primarily because the frame is quite flexible between the motor and the mainshaft, when the heli sees a hard cyclic load and a hard collective load, the frame twists right there. The gyroscopic forces of the motor also play a role, and I suspect that's why the tall kde/neu motors are particularly bad for gear stripping. When the frame twists the gears go out of alignment and the motors force is routed through a very small contact area on the gear face = gear stripped. Herringbone's are sensitive to the same kind of thing, if the gear gets misaligned in any way, all power is routed through just one side or the other of the herringbone pattern, which usually results in a stripped herringbone gear. This used to happen alot before folks learned to take a bit more care setting them up on the logo's. I think the 700e's flexy frame is still going to allow the herringbones to misalign and strip. I think the reason the align slant gears are working so well is that the axial load they induce is actually helping to keep the pinion and main gear aligned properly when the frame is trying to flex ! |
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02-17-2011, 01:10 PM | #7 (permalink) | |
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Quote:
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"If you think you can or you can not you are right" Goblin Xera 4530, YGE 160,VBar Diablo, HJive, 4525 Ultimate,VBar Synergy N5C sitting in Box... |
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02-17-2011, 01:31 PM | #8 (permalink) |
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Finally! I can't wait to try this. Do the mikado pinions mesh properly?
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02-17-2011, 01:59 PM | #9 (permalink) |
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Thanks for the info NTM.
It's always an educational experience in here. I've ordered the CHP RES frames and the frame supports, which I hope along with the 3rd bearing block will eliminate most or all of the dreaded frame flex in the 700e. So maybe this will be a better platform for the herring bone main gear. If not, I do have the helical cut gear and pinion in my stock pile of parts. Your thoughts NTM?
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Just another crappy day in Paradise.... Aloha! |
02-17-2011, 04:09 PM | #10 (permalink) |
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Join Date: May 2006
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Go for it, never know unless you try.
I'm building the res frames from chp right now, the elevator servo links are 60mm center to center, so a 45-46mm rod works well. The stock aileron bellcrank to swash rods are about right. The bellcranks require another shim on each side as the flanged bearings sit closer to the frame too. The frame is much stiffer than the stock align frame, especially with the 3rd bearing block and the frame stiffeners on there. And the battery tray setup rocks ! |
02-17-2011, 04:40 PM | #11 (permalink) |
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Join Date: Nov 2008
Location: Huntington Beach
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I finally found them here: http://rcehobby.com/index.php?cPath=2_89_92
Have not received them yet so I cannot vouch for the shop or the quality of the gears....yet. |
02-17-2011, 04:49 PM | #12 (permalink) |
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Join Date: Nov 2008
Location: Huntington Beach
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I'll post more when I get them installed and give them a good beating.
When I say beating I mean 1917 1Y with 710CY blades and CC 160hv gov gain past 16 Will be testing on a 700ec with KDE pinion support, third bearing block, and a lot of extra frame bracing. |
02-17-2011, 05:43 PM | #13 (permalink) |
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ok, thanks guys. Now I'm super stoked about installing the CHP frames. I have a Scorpion 4525 Ltd I want to try out.
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Just another crappy day in Paradise.... Aloha! |
02-17-2011, 07:02 PM | #14 (permalink) |
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Join Date: Sep 2008
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It look pretty beefy!
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NO FLYBARS |
02-20-2011, 06:44 AM | #15 (permalink) |
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Thread Starter
Join Date: Jul 2009
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actually i put it on my trex600esp stretch to 700 so need some modification to fit it..
tested with hard smack once with excellent result no strip and the sound is a bit reduced.. the main gear&pinion have good quality of materials but the pinion is short compared to scorpion M1 |
02-20-2011, 11:33 AM | #16 (permalink) |
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The 4525 is wayyyyy too powerful, suggest you send my way so I can do some testing before you hurt yourself...
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"If you think you can or you can not you are right" Goblin Xera 4530, YGE 160,VBar Diablo, HJive, 4525 Ultimate,VBar Synergy N5C sitting in Box... |
02-20-2011, 01:18 PM | #17 (permalink) | |
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Quote:
I have 2 of these motors and one is going into a Logo600se with the CF frames. This is just going to tie me over until the Logo700 is available...
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Just another crappy day in Paradise.... Aloha! |
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02-20-2011, 01:53 PM | #18 (permalink) |
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Join Date: Nov 2008
Location: Huntington Beach
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I see how you could make do with that, well for a little while anyways.
That frame is a work of art |
02-20-2011, 03:06 PM | #19 (permalink) |
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Yes their is, custom wound 5035's : ) well maybe, if my bird ever gets put back together..... i did manage to get the motor in, let me tell you it looks beastly weighs a bit more then the kde 1917
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TRex-800E /Scorp 5035-478 5+5YY 1.8mm/VBar Blue Full 5.2Pro /CC Hv160/WR-Herc Super BEC/RJX 810mm 3D /RotoTech 115 + QuickUk Tail/ Hitec 7940th HV/TP 5000 65c |
02-20-2011, 03:16 PM | #20 (permalink) |
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Join Date: Nov 2008
Location: Huntington Beach
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Props on winding one.
I've been kicking that idea around for some time now. Gonna build a new heli this summer. May have to have a look at powercroco. Nothing like being able to change the kv when you want. |
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