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Author: Subject: Prop Catcher - Demand?
RichardK

posted on 12/5/11 at 10:54 AM Reply With Quote
Thinking about it I do like your overlapping design, its growing on me! What sort of money you looking at?

R





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mcerd1

posted on 12/5/11 at 11:27 AM Reply With Quote
quote:
Originally posted by FASTdan
I would also hope that such a device will also save the chassis from serious damage.


thats what I always reconed..

even if the tunnel is enough to stop you getting injured, then the propcatchers will save your chassis and any wiring loom, brake or fuel lines that are in / near the tunnel

also I'd say the rear one if anything is more important (but I'd always fit a pair)
if the front one goes you can just knock the car out of gear - if the rear goes you've got to stop the wheels





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Confused but excited.

posted on 12/5/11 at 12:05 PM Reply With Quote
quote:
Originally posted by gavin174
hi

I would be interested.

not sure if 2 holes in each chassis tube might weeken the chassis a bit (4 for each catcher)


I have always been lead to believe that if you drill a hole through any structural tube, you should sleeve the hole (and ideally weld the sleeve in), to prevent weakening of the structure and any crushing of the tube.

Of course there are many guys on here with far more extensive knowledge of these matters than my humble self.





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se7en

posted on 12/5/11 at 12:06 PM Reply With Quote
quote:
Originally posted by RichardK
I personally would prefer this design
chunky2772 prop catcher 1
chunky2772 prop catcher 1


But maybe a bit faffy due to different tunnel width and prop diamentions.

Cheers

Rich


Ditto Rich. I think that yours is much better than the above. It is a piece of over-engineering.

Tom

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brookie

posted on 12/5/11 at 03:09 PM Reply With Quote
i will have a pair as well
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rick q

posted on 13/5/11 at 03:11 AM Reply With Quote
Front and rear are essential in my view. I've had a propshaft let go at the diff end - the catchers in mine saved both the car and me from considerable damage :- http://www.locostbuilders.co.uk/viewthread.php?tid=133580
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stevegough

posted on 13/5/11 at 05:12 AM Reply With Quote
Just one point - if you make it one piece, it would be much harder to fit to an existing (finished) car than a two - piece one, as you could fit it with the prop in situ - or am I stating the obvious? I quite like the idea of some protection in the tunnel, I would have one or two - you didn't answer the question of price, though?





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MikeR

posted on 13/5/11 at 05:56 AM Reply With Quote
yes please

i'm interesed in two please (a paranoid front and rear) :-)
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40inches

posted on 13/5/11 at 07:11 AM Reply With Quote
quote:
Originally posted by stevegough
- you didn't answer the question of price, though?

See the OP's first post.






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FASTdan

posted on 13/5/11 at 12:25 PM Reply With Quote
Some revisions to the design:

3mm Mild Steel
3x position options allowing oval for live back axles (30mm center distance on oval, is this enough?)
6 holes in each plate allows various mounting options, either 2 bolts or 4 bolts, overlapped or if desired can be trimmed down to be non-overlapping. Weight 220g per assembly.

As previously mentioned I am aiming for a price of £20 for a pair of catchers (4 plates).

Description
Description


[Edited on 13/5/11 by FASTdan]





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mads

posted on 13/5/11 at 12:51 PM Reply With Quote
i'm interested in a pair





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hucky

posted on 13/5/11 at 12:53 PM Reply With Quote
you have a buyer here
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RichardK

posted on 13/5/11 at 12:55 PM Reply With Quote
I'll take a set too please mate.

Cheers

R





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twybrow

posted on 13/5/11 at 01:33 PM Reply With Quote
Also interested in a pair... and maybe a pear...!
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40inches

posted on 13/5/11 at 01:34 PM Reply With Quote
That will do nicely thank you, you can put me down for a pair.






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FASTdan

posted on 13/5/11 at 03:36 PM Reply With Quote
Thanks for the responses guys, drawings are out for quote so early next week I should have a finalised price and delivery date.





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adithorp

posted on 13/5/11 at 04:02 PM Reply With Quote
If these are made to fit the width of an MK or book tunnel, does that mean there's no scope for adjusting then for the prop being offset in the tunnel?

The damage caused by a broken prop is because when it breaks it then flails around. That flailing can rip out fuel lines, wiring loom, start fires, and damage paneling and the chassis tubes and some have come through and hit legs/arses! By keeping the broken prop close to in line it doesn't flail but continues to spin. If it breaks at the rear then it'll stop when you put the clutch in, thus limiting the damage if you'relucky; If it's at the front it'll continue to flail untill the car stops. All the damage I've heard of, has been caused by this and not by digging in the ground.





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FASTdan

posted on 13/5/11 at 04:51 PM Reply With Quote
No scope currently for side to side adjustment - how far offset is a prop likely to be?

Current design has a 70mm hole, therefore 10mm clearance all round. I can increase this a bit but obviously as discussed the more clearance the more out of control the prop becomes. Another 10mm on the rad probably wouldnt hurt?

I could also make the holes into open ended slots, this would offer some scope for sideways adjustment however you will always be limited by a 20mm box section width.





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designer

posted on 13/5/11 at 10:39 PM Reply With Quote
quote:

if you drill a hole through any structural tube, you should sleeve the hole (and ideally weld the sleeve in), to prevent weakening of the structure and any crushing of the tube.



100% correct.

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indykid

posted on 13/5/11 at 11:47 PM Reply With Quote
quote:
Originally posted by designer
quote:

if you drill a hole through any structural tube, you should sleeve the hole (and ideally weld the sleeve in), to prevent weakening of the structure and any crushing of the tube.


100% correct.

It's a god job they're going in the uprights of the transmission tunnel then....

For offset props, you could have a split circular plate with an eccentric hole. Assuming you have the vertical wiggle room, you then drill your own holes in the mounting plate and chassis tubes, having lined it up as desired.

Probably best to stick with the current design though or you'll be iterating forever






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mrwibble

posted on 14/5/11 at 12:08 PM Reply With Quote
i'd be interested have to measure my tunnel width though first. are you going to keep some in stock or, are you taking orders?
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FASTdan

posted on 14/5/11 at 12:40 PM Reply With Quote
It will be a stock item so no need to pre order :-)





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tony.g

posted on 15/5/11 at 07:49 AM Reply With Quote
I'm interested,
When do you expect to have them?

Tony

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FASTdan

posted on 15/5/11 at 08:49 AM Reply With Quote
Should be 2 weeks, will be ordering later this week.





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HowardB

posted on 15/5/11 at 09:00 AM Reply With Quote
will they be powder coated, painted, galvenised, or some other cunning finish?

As an aside, what if they were made of er,.... plastic? 10mm thick,....







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