Roof bars

Looking for hard to find bull-bars etc? Or have something to give away for free? This is the place for you! NO TRADE! NB You can stipulate postage costs when giving away items, but no selling! Items for sale go in 'Small Ads' on here, or 'For Sale' on http://igmaynard.co.uk/bongo/bongo.htm

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Badapple
Junior Bongonaut
Posts: 12
Joined: Sun Jul 19, 2020 9:49 pm

Roof bars

Post by Badapple » Wed Jul 29, 2020 11:39 pm

Looking for a pair of roof bars to mount solar panels. Bongo is of the 96 vintage tin top and bars to mount to the gutter runs
20200622_210548_copy_2304x1728.jpg
Same as the roof rack is fitted to so I can retain that as well.
Thanks
Bob
Supreme Being
Posts: 15255
Joined: Wed Oct 17, 2007 12:54 pm
Location: North Somerset

Re: Roof bars

Post by Bob » Thu Jul 30, 2020 12:23 am

Be very, very, careful if you fit a panel like that.

At speed the panel will almost certainly act as an aerofoil and will be subjected to a large amount of lift, think carying a sheet of ply in a high wind.

It could well remove the roof bars at motorway speed, or, at the very least, will greatly reduce grip on the road. :?

Here's the science, the angle of attack will be provided by the air flow moving up Bongy's bonnet and windscreen:

http://brennen.caltech.edu/fluidbook/ex ... irfoil.pdf

And vid:

https://m.youtube.com/watch?v=KldLqShzCRM
Badapple
Junior Bongonaut
Posts: 12
Joined: Sun Jul 19, 2020 9:49 pm

Re: Roof bars

Post by Badapple » Thu Jul 30, 2020 8:14 am

Thanks I hadn't actually thought of that was trying to think of a secure way without drilling into the roof. Perhaps I should start a different thread asking opinions and what's been done previously. I have messaged the member who supplies the kits on here but haven't had a response.
Bob
Supreme Being
Posts: 15255
Joined: Wed Oct 17, 2007 12:54 pm
Location: North Somerset

Re: Roof bars

Post by Bob » Thu Jul 30, 2020 9:16 am

Certainly agree with you not drilling holes in the roof. :)
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