It is currently Thu 28. Mar 2024 10:11:25

All times are UTC + 1 hour





Post new topic Reply to topic  [ 7 posts ] 
  Print view Previous topic | Next topic 
Author Message
PostPosted: Wed 02. Jan 2019 13:48:43 
Offline

Joined: Sat 30. Aug 2014 0:03:16
Posts: 26
Hi,

I’m getting extreme vibrations in my 30cc Extra300LP. The readings are extreme in the elevator and aileron axis’, but higher in the rudder axis. Nevertheless, I activated rescue and didn’t see the gyro going crazy at idle or full throttle. As far as the vibrations of the model, I can tell they are normal.

One thing I noticed was the readings were about the same when engine was at idle or full throttle.

The Spirit is mounted in the recommended place per previous thread:

viewtopic.php?f=35&t=3031.

That place feels solid. I see no other good place to mount the unit other than the motor box which would be impractical for wiring reasons, plus being close to engine carb spills.

Attached are pictures of the readings and where the unit is mounted.

Thanks,

David


Attachments:
C8212FE0-CF65-4944-805D-A1D9255854D4.png
C8212FE0-CF65-4944-805D-A1D9255854D4.png [ 192.32 KiB | Viewed 816 times ]
C774741B-F67C-4A18-AC29-870E091A6909.png
C774741B-F67C-4A18-AC29-870E091A6909.png [ 177.14 KiB | Viewed 816 times ]
DCE044AD-88D8-41CB-9CEC-1CABCE71A61E.png
DCE044AD-88D8-41CB-9CEC-1CABCE71A61E.png [ 141.31 KiB | Viewed 816 times ]
Top
 Profile  
 
PostPosted: Wed 02. Jan 2019 14:24:11 
Offline

Joined: Sat 30. Aug 2014 0:03:16
Posts: 26
Pictures


Attachments:
7C3453EA-90A9-41C1-A5FC-6EFAA04A6CB4.jpeg
7C3453EA-90A9-41C1-A5FC-6EFAA04A6CB4.jpeg [ 655.86 KiB | Viewed 810 times ]
F24AADA1-3152-4649-85FF-65AAC9F9AA05.jpeg
F24AADA1-3152-4649-85FF-65AAC9F9AA05.jpeg [ 692.05 KiB | Viewed 810 times ]
917F84CA-1352-4035-B18B-5628FD7252E9.jpeg
917F84CA-1352-4035-B18B-5628FD7252E9.jpeg [ 1.97 MiB | Viewed 810 times ]
Top
 Profile  
 
PostPosted: Fri 04. Jan 2019 13:33:34 
Offline
Site Admin

Joined: Mon 29. Apr 2013 16:06:44
Posts: 12210
Hello,

with a gasser models it is relatively common.
But it is interesting that there are 3 spikes. This could mean that there are resonant frequencies. Or are there some gears? I guess that not.

_________________
Spirit System developer


Top
 Profile  
 
PostPosted: Fri 04. Jan 2019 17:14:12 
Offline

Joined: Sat 30. Aug 2014 0:03:16
Posts: 26
Hi Tomás,

Am I ok to go?

No gears, just a wood prop.

Appreciate your support.

David


Top
 Profile  
 
PostPosted: Sun 20. Jan 2019 11:40:04 
Offline

Joined: Mon 30. Oct 2017 19:18:22
Posts: 48
it have a massive impact where you mount your Spirit. You must mount it as close as possible to the engine. Even if it cause new wiring. Also you must mount it as hard as possible to the plane. It should not "wiggle" arround. Do not use 2 or 3 pads over each other to mount you Spirit.

When you mount it at the middle of the plane far away from the engine you will have massive vibrations. When you mount direct next to the engine and on a hard surface you will see that everything is good.

That was my solution for the vibration problems on my Extra 330e.


Top
 Profile  
 
PostPosted: Tue 05. Mar 2019 19:53:49 
Offline

Joined: Sat 30. Aug 2014 0:03:16
Posts: 26
threeDfreak wrote:
it have a massive impact where you mount your Spirit. You must mount it as close as possible to the engine. Even if it cause new wiring. Also you must mount it as hard as possible to the plane. It should not "wiggle" arround. Do not use 2 or 3 pads over each other to mount you Spirit.

When you mount it at the middle of the plane far away from the engine you will have massive vibrations. When you mount direct next to the engine and on a hard surface you will see that everything is good.

That was my solution for the vibration problems on my Extra 330e.



Mounting the Spirit Pro there would be the ideal location in terms of a hard surface, but would also be an impractical mounting location for a gasser because of the fuel, heat and spark/ignition noise that can affect the electronics.

In your case, your plane is electric.


Top
 Profile  
 
PostPosted: Sun 16. Feb 2020 18:43:38 
Offline

Joined: Sat 20. Jun 2015 3:32:50
Posts: 13
I have the same dilemma. I have the Spirit 2 mounted as shown - yet to fire her up so I don't know what the vibs are like.

Attachment:
current_position.jpg
current_position.jpg [ 298.6 KiB | Viewed 598 times ]


I am wondering about moving it to here:

Attachment:
new_position.jpg
new_position.jpg [ 177.45 KiB | Viewed 598 times ]


I would leave the RX where it is (Jeti EX link) but I don't know if extending the distance between FBL and RX is a good idea.

Suggestions welcomed. I had a JETI assist RX in a similar plane and that didn't go well due to vibs. I am hoping the Spirit 2 is more resiliant.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 7 posts ] 

All times are UTC + 1 hour


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  



Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
skymiles_red v1.0.1 designed by Team -Programming forum-سيارات للبيع .