Synergy Tech Support

Synergy Electric Helicopters => Synergy E7SE => Topic started by: jaso1 on March 01, 2016, 01:45:41 AM

Title: New boom fitted pushed in too far ?
Post by: jaso1 on March 01, 2016, 01:45:41 AM

Just fitted new boom to my E7 and been so long since I worked on it I forgot about the torque tube instructions saying--- when fitting boom to not push it al the way up against the gearbox as it will cause improper mesh of bevel gears.
I have already drilled and pined the boom in this position, is it really an issue ?   It seems to all spin smoothly but if I need to re-drill and move it I will  ???
 

Title: Re: New boom fitted pushed in too far ?
Post by: Chris Sexton on March 01, 2016, 02:46:51 AM

If it's spinning smoothly you should be ok. What happens when you push it in too far is that the transmission will deflect slightly and or the mushroom gear will push forward and the mesh with the front gears will get notchy.


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Title: Re: New boom fitted pushed in too far ?
Post by: jaso1 on March 01, 2016, 02:49:36 AM

Awesome thanks Chris, much appreciated.  ;)

Title: Re: New boom fitted pushed in too far ?
Post by: Rodney Kirstine on March 01, 2016, 08:56:46 AM

If it's pushed in too far, depending on circumstances, it can cause enough pressure on the front transmission to actually melt the mushroom gear.  If you feel that it's too far forward you could always slot that hole in the boom with a needle file to give you some adjustment.

Title: Re: New boom fitted pushed in too far ?
Post by: Dan Minick on March 01, 2016, 01:57:28 PM

Alternatively, just give the boom a twist and drill another hole!

Title: Re: New boom fitted pushed in too far ?
Post by: Mike Spano on March 01, 2016, 03:42:11 PM

I always make my "pin" hole too large to allow for adjustment on either end. the pin hole is not to support the boom, but to prevent it from sliding out if a clamp bolt fails, or you forget to tighten them. meaning, it doesn't have to be perfect. it only needs to be through the boom, and not allow it to slide out if there is a failure.

do as others above have mentioned, and elongate your hole, or twist the boom and go at it again.

Title: Re: New boom fitted pushed in too far ?
Post by: jaso1 on March 03, 2016, 04:00:27 PM

Very good info guys.
I will lengthen the hole to give a small amount of movement.  That does sound like the easiest method at this stage.

Now I'm trying to decide if I should change the head block etc up to SE spec or just fly it as is till maybe next time I need parts and perhaps do it then.

thank you .

Title: Re: New boom fitted pushed in too far ?
Post by: Mike Spano on March 04, 2016, 07:54:35 AM

I personally would stick with what you have until you crash and need to replace it. that is my inner "cheap self" coming out though. lol the new head does fly awesome!