The BSA A7-A10 Forum

Technical (topic titles must be descriptive) => Frame => Topic started by: Chris A10 on 09.06. 2021 21:08

Title: Golden Flash noise > Horn mount
Post by: Chris A10 on 09.06. 2021 21:08
Mod edit: Reminder, plesae stay on topic in the tech boards, with relevant topic title.
Split & renamed, from https://www.a7a10.net/forum/index.php?topic=16293.0


The strenge sounds i was hearing yesterday   have been located.
Title: Re: Golden Flash noise > Horn mount
Post by: muskrat on 09.06. 2021 21:17
G'day Chris.
Not a good place to mount a horn. Blocking air flow to the head will result in more expensive noises  *work*
Cheers
Title: Re: Golden Flash noise > Horn mount
Post by: Black Sheep on 09.06. 2021 22:26
At least the horn is still there. Time to invest in a lock washer or nylock nut I reckon.
Title: Re: Golden Flash noise > Horn mount
Post by: BagONails on 10.06. 2021 04:25
I had the same problem, when I pressed a button on the left handlebar that thing dangling down there made some very strange sounds.... *problem*
Title: Re: Golden Flash noise > Horn mount
Post by: trevinoz on 10.06. 2021 23:12
If you mount the horn on the bottom of the tank on the brace studs you risk fracturing the stud welds.
I found this out the hard way in about 1968 when I bought my first Flash.
The horn was so mounted and I got a fuel leak.
Title: Re: Golden Flash noise > Horn mount
Post by: RichardL on 10.06. 2021 23:44
If you mount the horn on the bottom of the tank on the brace studs you risk fracturing the stud welds.
I found this out the hard way in about 1968 when I bought my first Flash.
The horn was so mounted and I got a fuel leak.

Resonance is a mighty force.

Richard L.
Title: Re: Golden Flash noise > Horn mount
Post by: trevinoz on 10.06. 2021 23:58
Is that like vibration, Richard?
Title: Re: Golden Flash noise > Horn mount
Post by: RichardL on 11.06. 2021 03:50
I suppose you're pulling my leg. Vibration without infused energy typically dies out harmlessly. Keep pumping energy into the system at its resonant frequency and you get destruction. (Just for the sake of telling you and probably everyone else here something you already know.)

https://youtu.be/esfpcnQW6qs

Richard L.
Title: Re: Golden Flash noise > Horn mount
Post by: Greybeard on 11.06. 2021 08:38
I remember my Pop explaining how a troupe of marching soldiers would be told to 'break step' when crossing a weak bridge to avoid resonance destroying the bridge.


https://m.timesofindia.com/why-are-soldiers-ordered-to-break-their-marching-steps-while-crossing-a-bridge/articleshow/1499987.cms#:~:text=When%20soldiers%20march%20in%20three,sine%20waves%20on%20the%20bridge.&text=This%20oscillation%20would%20reach%20a,steps%20while%20crossing%20a%20bridge.
Title: Re: Golden Flash noise > Horn mount
Post by: berger on 11.06. 2021 09:49
nobody told the engineers about it who built that foot bridge in london *bash*
Title: Re: Golden Flash noise > Horn mount
Post by: Greybeard on 11.06. 2021 09:56
nobody told the engineers about it who built that foot bridge in london *bash*
That was mad. The bridge now has long shock absorbers fitted.
Title: Re: Golden Flash noise > Horn mount
Post by: ellis on 11.06. 2021 19:19
We have a warning notice on the A586 at Poulton nr Blackpool. It says no more than 18 people on the bridge at any one time. So be warned. Any number of Artics and eight wheelers plus Buses and cars.


ELLIS