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Author Topic: E7SE: How optimal is the head geometry for the VBar?  (Read 5688 times)

Offline curmudgeon

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E7SE: How optimal is the head geometry for the VBar?
« on: August 09, 2013, 08:36:00 PM »
After my very good experience with two E5's, I am planning on transferring all the electronics from a MA Whiplash to a Synergy E7SE.  The Whiplash head geometry is just not optimal for the VBar, and I just don't want to spend my limited helicopter time on the bench trying to optimize the Whiplash; I'm moving on.

Is the E7SE head geometry as optimal for the VBar as the E5 head geometry?

Offline Chris Sexton

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #1 on: August 09, 2013, 09:17:35 PM »
You will like what you see :)

sent from my Verizon Samsung Galaxy Note 2

Chris Sexton
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Offline Jean-Luc Bolduc

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #2 on: August 10, 2013, 08:52:12 PM »
Same geometry as on the E5.
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Offline Enrique Perez

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #3 on: August 13, 2013, 05:35:11 PM »
Geometry on the E7SE is perfect for VBar. If you need a starting config for it let me know and Ill be happy to send you my file.
Enrique Perez
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Offline curmudgeon

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #4 on: August 13, 2013, 05:45:05 PM »
Same geometry as on the E5.
The blade grip arms are different between the E5 and the E7SE;  I just wanted to verify that the E7SE head geometry would still play well with the VBar.

I will be getting rid of my Whiplash (at a substantial $ loss) mainly because the head geometry is not optimal for the VBar, and I don't want to spend any more time trying to optimize the head geometry with different ball link studs and servo arm lengths.  I just wanted to confirm that I would not run into similar VBar issues with the E7SE as the Whiplash.  I guess I will find out soon enough.   ;)

Offline curmudgeon

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #5 on: August 13, 2013, 05:50:16 PM »
Geometry on the E7SE is perfect for VBar. If you need a starting config for it let me know and Ill be happy to send you my file.

I would be interested in learning your VBar numbers:

1) VBar Cyclic number (80-110) for 8°
2) VBar Collective number (80-100) and actual mechanical collective range (+°/-°).  Also, what are your corresponding transmitter Pitch channel Travels/ATV's
3) VBar Cyclic Ring number and actual mechanical cyclic range
4) VBar Tail travels

Thanks.

Offline Enrique Perez

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #6 on: August 13, 2013, 07:02:17 PM »
Here are my numbers and I attached the screen shots as well.

1) VBar Cyclic number (103) for 8.5°
2) VBar Collective number (100) and actual mechanical collective range (+13.3°/-13.3°).  Also, what are your corresponding transmitter Pitch channel Travels/ATV's (POS=100 and NEG=106)
3) VBar Cyclic Ring number and actual mechanical cyclic range (Ring at 80 , did not measure the full range)
4) VBar Tail travels (CW 110 CCW 110)

Video of how it performs.

http://youtu.be/Ny-wcYF0LEc
« Last Edit: August 14, 2013, 08:16:01 PM by eperez74 »
Enrique Perez
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Offline wbfines

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E7SE: How optimal is the head geometry for the VBar?
« Reply #7 on: August 13, 2013, 08:46:12 PM »
Nice flight eperez!!

Offline curmudgeon

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #8 on: August 13, 2013, 10:00:17 PM »
1) VBar Cyclic number (103) for 8.5°
2) VBar Collective number (100) and actual mechanical collective range (+13.3°/-13.3°).  Also, what are your corresponding transmitter Pitch channel Travels/ATV's (POS=100 and NEG=106)
3) VBar Cyclic Ring number and actual mechanical cyclic range (Ring at 80 , did not measure the full range)
4) VBar Tail travels (CW 110 CCW 110)

Enrique, that was very nice flying.  Thanks for sharing the video.

The E7SE VBar numbers are within the optimal range, but the E5 seems to yield more middle of the optimal range numbers.  My guess is that the E7SE has longer grip arms than the E5, and therefore more resolution.  Thus the VBar numbers come out a bit higher than with the E5.  Of course, this is just more of an academic observation, as it does not have a relevant negative impact in performance.

With my Whiplash using the stock recommended setup, my VBar numbers come out a lot worse.  Like you, I have the VBar Collective maxed out at "100", but even with the transmitter Pitch channel Travel's at 101% high and 113% low, my mechanical collective range is only +12.4°/-12.4°.  The Cyclic Ring binds at "72".  If I change the servo arms and/or swash link studs to improve the collective range, it worsens the Cyclic Ring.

Either way, I should receive the E7SE on Friday, so I am very excited about that.

Offline Enrique Perez

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #9 on: August 13, 2013, 11:34:50 PM »
Thanks for the complement. Once you get the first flight in trust me you will be hooked. Feel free to contact me if you have any other questions and Ill be glad to help answer them.
Enrique Perez
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Offline Jean-Luc Bolduc

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #10 on: August 14, 2013, 08:43:39 AM »
Just measured the distance between the head yoke and pitch arm ball, and they are the same on the E7SE and E5.
My vbar numbers are close to Enrique, running 13.5 pitch, 8.5 cyclic and 85% ring.
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Offline Chris Sexton

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #11 on: August 14, 2013, 08:48:49 AM »
the difference in the E5 and E7se heads is the distance from the swash ball to the pitch ball. The longer rod will effect the geometry.

That said, the E7se head is in the green on vbar and flies PHENOMENAL with every FBL system I have tried, VBar, iKON, BeastX, and SK540.
Chris Sexton
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Offline Jean-Luc Bolduc

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #12 on: August 14, 2013, 06:29:51 PM »
The difference in lenght from the swash ball and the pitch ball on the E5 and E7se is only 2.5mm on mine,  hardly any significant difference to affect head geometry.
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Offline Fasster

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Re: E7SE: How optimal is the head geometry for the VBar?
« Reply #13 on: August 14, 2013, 07:25:40 PM »
Great flight Enrique  and thank you for posting up your Vbar files , will make life easy setting her up,

wow very fast tail, i usually sit around 80 with mine or it gets too scary for me  :)

BTW  is the verification process active for every post or just the 1st few ?

flyalan

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E7SE: How optimal is the head geometry for the VBar?
« Reply #14 on: August 14, 2013, 07:32:02 PM »

Great flight Enrique  and thank you for posting up your Vbar files , will make life easy setting her up,

wow very fast tail, i usually sit around 80 with mine or it gets too scary for me  :)

BTW  is the verification process active for every post or just the 1st few ?

Just the first few. Just to be sure you are a real person :-)

Cheers
Alan