slimming down leaf springs ?

Bikes or not. Whatever
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Vincent.vanGinneke
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Re: slimming down leaf springs ?

Postby Vincent.vanGinneke » Wed Jan 29, 2014 12:01 pm

I think the dimensions are 90 cm from eye to eye and ± 4 cm wide
Here are some pics I found on French websites:
salon_retro_lyon_2011_3.jpg
salon_retro_lyon_2011_4.jpg
salon_retro_lyon_2011_1.jpg
salon_retro_lyon_2011_2.jpg


Top two pictures are the same body as mine but different wheel hub, mudguard and frame.
Last two are from the type that has a hinged luggage compartiment at the rear and a fronttop that slides/hinges forward to make boarding easier.
That's what you do, you board these rocketships !

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Steven.Carter
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Postby Steven.Carter » Wed Jan 29, 2014 6:06 pm

Wow, the sidecar looks faster then the bike!

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Vincent.vanGinneke
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Re: slimming down leaf springs ?

Postby Vincent.vanGinneke » Wed Jan 29, 2014 8:02 pm

This is the one

Bernardet Grand Sport Record du Monde Avion (9).jpg

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Steven.Carter
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Postby Steven.Carter » Wed Jan 29, 2014 9:05 pm

Who wouldn't want a ride in that.

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Re:

Postby Bob.Murphy » Thu Jan 30, 2014 10:57 am

That's an amazing sidecar 8-) .

If I'm understanding the mechanics - the two springs are supporting the sidecar body only - not contributing to the chassis/bike's suspension.

Its a single seat 'chair' so the springing rate won't be very high - max of 70Kilos for the body with luggage and 80 Kilos for the passenger (its French, not German :lol: )??

So you are looking for fairly light springs.

There must be companies that still make bespoke springs for the 'Classic Car' market, so it may be worth doing a 'Google'.

I hope you are going to produce an illustrated restoration thread ;) .

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

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Vincent.vanGinneke
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Postby Vincent.vanGinneke » Thu Jan 30, 2014 12:03 pm

Hello Steven, Bob, In the thread 'French chair' ( viewtopic.php?f=7&t=2895 ) you see some more pictures .
I found a producer of 'bakfiets' springs, available in 5, 6 and 8 leaf package with weight ratios of 300, 500 and 800 Kg.
So even a Obersturmbahnfuhrer with a gross weight of 150 Kg will be catered for .
I'll ask our beloved webmaster to transfer the French chair thread to my 'blog' on the SpAriel, I can put progress pictures there then.

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Postby brianbarbary » Sat Feb 01, 2014 4:57 pm

if you grind down the springs will they be the right spring tension for your use ,you could get springs made if you know the length and load of the spring you may be able to get one made to order i would get the advice of a spring specialist

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Vincent.vanGinneke
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Postby Vincent.vanGinneke » Sun Feb 02, 2014 12:19 pm

Hello Brain, Thanks, but I'll pass on the grinding of the springs ! , I go for the 'Bakfiets' leaf springs.


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