New angle on cycle wings
Mark Allanson - 31/10/04 at 10:19 PM
I fitted my cycle wings today, I wanted to aviod the airborne GRP syndrome. The flat section of the support stress fractures and look , no cycle
wing.
I decided to do away with the transverse part of the support, and replace it with an arched section to go on the inside of the guard. I know this will
load the GRP parts, but it is not suscepible to stress fatige so the idea may work. I have fastened the guards with 4 M6 SS button hex head set
screws, they look quite neat on the inside of the molding. the guard do touch the bodywork on full lock, so I am going to have to restrict the lock on
the rack somehow, any neat suggestions?
Rescued attachment ModCycleWings.jpg
splitrivet - 31/10/04 at 10:34 PM
Looks cool Mark,Iwould think the bulk of the stress would be on your fixing point though and the fibre glass around it.
Could you not weld a couple of 2" flat pieces to the support rims and PU em to the wing.
Just my two pennorth.
Cheers,
Bob
Northy - 31/10/04 at 10:36 PM
A couple of strong Jubilee clips on the steering rack cured too much lock on my car!
Looking good Mark. Whens the SVA date then? 
Mark Allanson - 31/10/04 at 10:44 PM
quote:
Originally posted by Northy
A couple of strong Jubilee clips on the steering rack cured too much lock on my car!
Looking good Mark. Whens the SVA date then?
A couple of jubilee clips soon to be fitted, the car is almost ready for SVA, just going to get it painted (Rover trophy blue with a trick clear
coat). With the weather closing in, I will probably book the SVA for the new year, and make sure everything is just right
Mark Allanson - 31/10/04 at 10:46 PM
quote:
Originally posted by splitrivet
Looks cool Mark,Iwould think the bulk of the stress would be on your fixing point though and the fibre glass around it.
Could you not weld a couple of 2" flat pieces to the support rims and PU em to the wing.
Just my two pennorth.
Cheers,
Bob
Already thinking of something like that, the wings are not quite straight, a bit of bending of the supports will cure that, but additional strenght
without adding too much weight would be an advantage
Mark Allanson - 31/10/04 at 10:47 PM
The design also removes any edges for the SVA man to find
Rescued attachment ModCycleWings2.jpg
Chris Green - 1/11/04 at 08:12 AM
Mark,
Is that Copper tube that you have used for the wing support?
If so, how mave you attached the tube to the steel mounting plate? brazing?
Cheers!
Chris.
Mix - 1/11/04 at 08:43 AM
Nice idea, in my view the cycle wing attachment will be less prone to cracking.
I would be a little concerned about the stresses at the attachment of the two rods/tubes to the plate though, there will be quite high bendind loads
at this point which may lead to failure.
Ron's design gets around this by using the upper wishbone ball joint as an additional support. I think that's the way I'll go.
Mick
James - 1/11/04 at 10:01 AM
quote:
Originally posted by Chris Green
Mark,
Is that Copper tube that you have used for the wing support?
If so, how mave you attached the tube to the steel mounting plate? brazing?
Cheers!
Chris.
Copper tube would last about 5 minutes on GB roads!
It's just rusty metal!
James
Chris Green - 1/11/04 at 03:14 PM
ok cheers James.
Thanks for not taking the p1$$ too much.
Regards,
Chris.
(Still looks like copper to me though! 
)
Mark Allanson - 1/11/04 at 07:10 PM
Copper, COPPER, I am a welder not a bleedin plumber!!
It is 13mm x1.6mm ERW round, The tube will be fine as for stress cracking, but I may have a problem on the HAZ area on the lower plates after a few
thousand miles - but easily fixed if I do
