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Duncan McFadyean
Joined: 18 Jan 2011
Posts: 218
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 Posted: Thu Apr 23, 2020 2:28 am Post subject: Instrument Panel Advice re placement on Firewall options |
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Tony,
Personally I would not bother. The standard instrument panel is quite flexible anyway, to the extent that a g-meter installed in mine gets 'flicked' to stupidly high readings on a hard landing as the panel rebounds elastically. A resilient foam gasket under the panel mounting flange may provide some useful damping.
Duncan Mcf.
| Quote: | On 23 April 2020 at 06:21 Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:
Gidday,
I have my instrument panel such that it sits on small rubber mounts, the type that is a 1/2 wide rubber mount with a flat washer either side, which have centrally located threaded 1/4” shanks out each side. These ones are pretty hard though, hard to tell if they would do much. With these in place my panel will be suspended on them, and sit somewhat on a small soft rubber pad on top of my tunnel. I am wondering if I should be bothered, whether I should ditch this idea and mount the panel to the firewall directly like I believe the instructions dictate. I’m keen on knowing what people think of attempts to isolate the high frequency vibration, whether it's worth the effort. I am going to have an electronic panel as best as I can, and my sub panels screw straight onto lugs on my panel carcass. I’ve also been advised to cut the lip off the top of the panel which I have addressed by building an inverted, internal flange, so I can do this, but other than weight saving I’m w!
ondering if that is a common thing to do. It wouldn’t hurt to put my panel forward an extra 1/2” but it’s not an imperative, and I do already have the mounts attached to the firewall, albeit with nylocs on the engine side, to be changed for conventional nuts before I go too far and forget.
Any tips gratefully accepted.
Regards
Tony Renshaw
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rowlandcarson(at)gmail.co
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| Posted: Fri Apr 24, 2020 2:51 am Post subject: Instrument Panel Advice re placement on Firewall options |
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On 2020-04-23, at 06:21, Tony Renshaw <tonyrenshaw268(at)gmail.com> wrote:
| Quote: | I have my instrument panel such that it sits on small rubber mounts
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| Quote: | I’ve also been advised to cut the lip off the top of the panel which I have addressed by building an inverted, internal flange, so I can do this, but other than weight saving I’m wondering if that is a common thing to do
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Tony - I think it probably is common, although perhaps not much reported. Here is a link to a picture of my instrument module (F14) with a flange similar to what you describe:
http://www.rowlandcarson.org.uk/aviation/europa_435/im_inner_flange.php
Although I have now discarded the mechanical gyros I originally intended to fit:
http://www.rowlandcarson.org.uk/aviation/europa_435/subpanel.php
I am retaining the anti-vibration bushes on which the main aluminium panel is mounted. I feel that the mechanical movements of the ASI, altimeter & VSI would probably live a bit longer with some vibration damping. Here is a link to a picture of the unpopulated aluminium panels:
http://www.rowlandcarson.org.uk/aviation/europa_435/laser_etching.php
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
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