Paul (Notts)
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| posted on 26/10/05 at 02:46 PM |
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Chassis strength and drilling holes
Thinking about fitting aero catches to secure bonnet but am concerned that drilling 10mm holes through the top members ( to fit pins ) in two places
may affect the strength of the chassis..
any thoughts...?
Its a luego viento chassis.
 
Rescued attachment oct 011.jpg
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Paul (Notts)
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| posted on 26/10/05 at 02:47 PM |
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another pic
side view
 
Rescued attachment oct 009.jpg
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flak monkey
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| posted on 26/10/05 at 02:50 PM |
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I wouldnt worry about it if I were you. The loads in the chassis arent that high for you to worry about a couple of 10mm holes....
IMO any, no doubt someone will disagree.
David
Sera
http://www.motosera.com
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drmike54
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| posted on 26/10/05 at 03:28 PM |
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IMHO I would drill a hole and weld a tube through it. Then attach the pin. A 10 mm hole in a 25 mm tube is a lot. Or maybe attach a bracket on the
Side of the tube to attach the pin.
Started Welding the chassis!!!!
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Paul G
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| posted on 26/10/05 at 03:41 PM |
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You've got me worried now - I've almost finished my build and have put a few holes of that size in the chassis for rivnuts, I thought this
would be fine but after hearing this will it cause problems?
Paul
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907
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| posted on 26/10/05 at 03:58 PM |
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quote:
Originally posted by drmike54
IMHO I would drill a hole and weld a tube through it. Then attach the pin. A 10 mm hole in a 25 mm tube is a lot. Or maybe attach a bracket on the
Side of the tube to attach the pin.
I'm with drmike54 on this one.
Maybe weld the pin in the chassis facing upwards, and drill a hole in the bonnet.
( I take it that these are locating pins )
Err, Sorry.
Paul G (another one)
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flak monkey
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| posted on 26/10/05 at 04:16 PM |
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quote:
Originally posted by drmike54
IMHO I would drill a hole and weld a tube through it. Then attach the pin. A 10 mm hole in a 25 mm tube is a lot. Or maybe attach a bracket on the
Side of the tube to attach the pin.
Well if you think thats the way to do it the go for it:
http://locostbuilders.co.uk/viewthread.php?tid=27014
Sera
http://www.motosera.com
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marc n
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| posted on 26/10/05 at 04:20 PM |
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make a tophat bracket in alloy to rivet on 4 x 5mm rivets then fix the pin through this as below, bracket shown needs rotating 90 degrees ( apologies
for the crap photoshop effort )
yes you are dilling four holes but they are only 5mm and are only on one side of the box
this is how we are fitting them
best regards
marc
[Edited on 26/10/05 by marc n]
[Edited on 26/10/05 by marc n]
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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marc n
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| posted on 26/10/05 at 04:21 PM |
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oops forgot picture
 
Rescued attachment pin mod.jpg
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Paul (Notts)
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| posted on 26/10/05 at 04:34 PM |
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Cheers Mark ,
That was one of the ideas I was thinking about and will I go along the lines of making a bracket and riveting it down. This will also allow me to
play around with the alignment before final fixing.
Paul
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Rorty
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| posted on 28/10/05 at 03:57 AM |
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Marc's bracket is a good option if you've got room (which obviously there is, as Marc's doing it that way), but the bracket could
fracture if there's much vibration or distortion of the bodywork at high speeds.
Welding in a crush tube is a 110% job, but whatever you do, don't just make holes that size in the chassis without some sort of closure.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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mnr laptop
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| posted on 28/10/05 at 06:48 AM |
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agree with rorty the crush tube is the way to go if you arent powdercoated, but if you are powdercoated next best option is the bracket you could make
from m/s and gusset if fatigue is a worry
best regards
marc
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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Paul (Notts)
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| posted on 29/10/05 at 02:50 PM |
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prototype bracket
Made from 25mm steel tube - will either riviet or rivnut to chassis
 
Rescued attachment oct 028.jpg
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Paul (Notts)
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| posted on 29/10/05 at 02:50 PM |
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other pic
 
Rescued attachment oct 030.jpg
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Rorty
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| posted on 30/10/05 at 02:47 AM |
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Very long "wings" on it, but nicely executed. Well done.
Cheers, Rorty.
"Faster than a speeding Pullet".
PLEASE DON'T U2U ME IF YOU WANT A QUICK RESPONSE. TRY EMAILING ME INSTEAD!
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