43longtime

I have been thinking about how I want to do my Parachute bracket for future use since I will have the rear of the car apart for my back half project, but I would like to get some advice on how to go about putting the Bracket in, if you could post pictures of your Parachute bracket installed and how you did them that would help me out a lot.

Thanks,

Chris

xpndbl3

iTrader: (5)

wolfe racecraft makes a nice one, search for it

AlkyIROC

Depends on how you want to mount it. The Wolfe model attaches to the original bumper mounts but it also assumes you still have original frame rails for the strength behind the mounts. Cutting all that out in a back half means the rear sheetmetal of the car won't make a great place for a chute to pull from.

I made a simple mount similar to the kit you can buy from Comp Engineering.

Some 1-5/8" roll cage tubing welded between the frame rails at the rear. A 1-5/8" tube welded straight out the back. A bracket is mounted on the end for the chute to pull from. There's some specific specs for the bracket now but it needs a 1/2" bolt plus a larger sleeve over the bolt. The chute strap can't pull on just the bolt. There are 2 smaller tubes welded diagonally to brace the mount tube. 1" or 1-1/4" tubing is fine.

Mounting the chute holder is minor. It just needs to hold the chute pack in place and doesn't need to be excessively bit. A simple mount kit is also available from CE.







I had to change the height and angle of the chute mount after I installed a wing a few months ago.

Gumby

Just don't under estimate the pull strength of a chute when deployed.
[Like dropping a sherman tank out the hatch as a drag anchor]

seach uboob for all sort of funny vid where folks didn't secure it well.

43longtime

I was thinking about using a peace of 1/4 flat metal across the back of the car to attach it to the old frame rails to help hold the rear end in place and then was going to weld my 4 link frame rails to it as well.
Do you think I could just weld a pipe off of that and stub it out the bumper?

Thank
Chris

Gumby

to early for my brain to see that image in my head.

but what AlkyIROC did is very nice with the trianglazation [is that a word?]


[OT, I wonder if he painted or powder coated the frame, looks so nice.]

Andrew91GT

Absolutely not. You need to put 2x3 or 1 5/8" material there at the very least to attach the parachute.

Andrew91GT

You also need to consider two things in parachute bracket design:

1. The chute should spring out into the airflow above the car which will help it to deploy.

2. The attachment point where it pulls on when you've deployed it should be at the height of the center of gravity. This is really pretty impractical to measure, so people approximate it as the height of the camshaft. If you mount this too high, it will pull the rear of the car off of the ground when you pull the chute. If it is too low, you will pull the nose off of the ground.

Here is my setup:

43longtime

Are you using 2 parachutes? That is why you have the big bracket.

Andrew91GT

That is correct.

43longtime

Do you think something like this would work for the Parachute bracket.
The second one shows the fuel cell do you think that would work for that as well?

There will be sheet metal covering all of it up but need a place for the fuel cell to mount to that is flat and I was thinking since I have to put the bracket for the parachute in then that could double as the fuel cell mounting point.

Andrew91GT

I would holesaw the 1/4" plate, run the parachute bracket through it, weld it up and I'm ok with your suggestion.

Andrew91GT

Here is how we did mine:



We made a frame out of 3/4" square tubing and made sure it was flat on top, this let us mount the fuel and water cells, and provided a nice flat surface for the tin work to sit on top of.

43longtime

That is how I am going to do mine. Get a 2 for one deal parachute and fuel cell mount.

What are you running water for?

Andrew91GT

Icewater for the air/water intercooler.

43longtime

Ok, Thanks for the help everyone. I will keep you all updated on my progress.