May 04, 2024, 05:58:46 AM

Author Topic: E5 Tail Speed Up Gears  (Read 4668 times)

Offline OnTheSnap

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E5 Tail Speed Up Gears
« on: December 12, 2012, 12:19:40 PM »
I would like to run my E5s with 95mm tail blades so I need the speed up gears for the tail. Any info on when they will be released?

I will run 105's until then but would have preferred to not have to disassemble the model if possible.

Offline RichL

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Re: E5 Tail Speed Up Gears
« Reply #1 on: December 12, 2012, 12:27:59 PM »
I'm running 96mm Rails on my tail, as are Barry, Mike, Freddie and Matt. No change needed.

Rich
« Last Edit: December 12, 2012, 12:52:13 PM by RichL »
Synergy E5: Scorpion HKIII 4025-1100, CC ICE2 120HV, Rail 556/96, V-Bar Silverline

Synergy E7: Quantum 4530-500, CC ICE2 160HV, Rail 716/116, V-Bar Silverline

Offline Chris Sexton

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Re: E5 Tail Speed Up Gears
« Reply #2 on: December 12, 2012, 12:58:10 PM »
Chris Sexton
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Offline RichH

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Re: E5 Tail Speed Up Gears
« Reply #3 on: December 12, 2012, 05:56:21 PM »
I'm running 96mm Rails on my tail, as are Barry, Mike, Freddie and Matt. No change needed.

Rich

What head speed are you running?  I was planning on 2300 rpm and am concerned the stock gearing won't hold well.  Had issues with this on m T550.

Offline Chris Sexton

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E5 Tail Speed Up Gears
« Reply #4 on: December 12, 2012, 06:04:09 PM »
2350 and 96mm tails hold fine on my e5 with 556.


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Chris Sexton
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Offline OnTheSnap

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Re: E5 Tail Speed Up Gears
« Reply #5 on: December 12, 2012, 06:55:52 PM »
Thanks Chris!  Hopefully vendors will update the part description for future stretchers.

"Tail holds fine" - Well obviously this is one of those massively personal things and making a general statement like that is kinda meaningless unless it includes exactly how that conclusion was made.

For me when I test a new model I perform the following test to assess "tail hold" -
Get into a backwards inverted clockwise hurricane.  Full collective as fast as you can get it.  Once your at the max speed (can easily be near 100mph), drop the tail into an inverted tail down funnel.  If the tail screams and holds on you are golden.  Even a Logo 600 with 95mm tail blades fails this test (usually). 105mm is needed to survive it.

I was one of the first to buy a 600 pro, not knowing the 3.85 tail gear ratio secret.  I immediately plowed it in the second flight when I ran 2200 gov'd and the tail gave up unexpectedly on me. This lead to quite a famous thread.   Not planning on repeating the fun of that experience.  :P
« Last Edit: December 12, 2012, 07:47:24 PM by OnTheSnap »

Offline Chris Sexton

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E5 Tail Speed Up Gears
« Reply #6 on: December 12, 2012, 07:06:09 PM »
Tail down funnels check.


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Chris Sexton
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Offline OnTheSnap

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Re: E5 Tail Speed Up Gears
« Reply #7 on: December 12, 2012, 07:41:17 PM »
At ~100mph coming out of a hurricane?  ???  It's an extremely violent test.

Anyway I would expect 2350 with 96mm and a 4:1 to likely hold it. At 2200 it would likely fail.
« Last Edit: December 12, 2012, 07:48:03 PM by OnTheSnap »

Offline Chris Sexton

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E5 Tail Speed Up Gears
« Reply #8 on: December 12, 2012, 07:52:39 PM »
At ~100mph coming out of a hurricane?  ???  It's an extremely violent test.

Anyway I would expect 2350 with 96mm and a 4:1 to likely hold it. At 2200 it would likely fail.

LOL not with me flying ;)

My buddy put mine through the paces at 2350 and 2550 and it held fine. But no he didn't do any 100mph hurricanes.


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Chris Sexton
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Offline Richard Rollins

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Re: E5 Tail Speed Up Gears
« Reply #9 on: December 13, 2012, 06:18:28 PM »
Hey Chris,
Talk to me about this new Talon 90 ? Will it hold up to hard 3d w/ all HV servos running 6s 5000 Mah batteries? I got a new ICEII 120 .

Thanks,
Rick
Rick
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Offline Chris Sexton

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E5 Tail Speed Up Gears
« Reply #10 on: December 13, 2012, 06:27:15 PM »
Hey Chris,
Talk to me about this new Talon 90 ? Will it hold up to hard 3d w/ all HV servos running 6s 5000 Mah batteries? I got a new ICEII 120 .

Thanks,
Rick

In the end i decided to stick with my 100a Hobbywing and rx pack.

Looking like the talon isn't quite enough for hard 3d.


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Offline Matt Botos

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Re: E5 Tail Speed Up Gears
« Reply #11 on: December 14, 2012, 01:40:44 AM »
OnTheSnap,

Around 9500-10k is your target tail rotor RPM if you want the tail to hold as described. This is why I designed in the optional tail ratio.... The E5 has options for everyone! :)
I have been running the 4.0:1 Tail Ratio on a stretched E5 at 2350 RPM with very good results. This is with both 96mm and 106mm tail blades.

Thanks,

Matt