Mopar Muscle Association UK

We are still working on the rear body shape.

I’m keen to try and get the parachute mounted and tested this season and keen to try and launch the parachute from infront of the rear wheel. (I’m not aware of anyone doing this today)

The idea is having it in front of the rear wheel will allow me to have a very pointy aerodynamic rear end.


Due to parachute pull lines I had to create some structure over the rear wheels to support the pull lines and ensure they don't get caught up in rear wheel.


Lots of unknown but only one way to find out

I Hope i did blue proud with the holes

It’s going to be Interesting testing it :/

the only possible problem i can see with that setup is the chute will be pulling above the rear axle line. the bike could get very light on the front or could even wheelie when the chute is deployed
neil.

Yes, Neil, you are correct!

There is so little known about parachute mounting points, and I have spent two years studying, testing and going around the pits.

We had looked at deploying the parachute from behind the rear wheel but it just takes up so much space.


While the parachute will deploy from in the front of the rear wheel the pull lines connect to axle plates on the rear end. (marked in red)

I was a cheeky boy and happened to walk into a wind tunnel with load cells and full 3D lidar scanners

This has given us so much data like initial Pull force , sustained, degrading pull force/side load/ground effect/drag coefficient etc. etc

The 3D lidar helps us understand patterns with ground effect and how the bike could be pulled up, down, left right etc

The below vid is a 3D point cloud which correlates location to force. (when it goes left, it will pull the bike left with xxxKG of force etc etc





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Im not aware of anyone in the world that has gone to this level of testing or has this much data







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The parachute pull location is determined based on few things and happy to talk anyone thought what i have learned.











Picture is of Guy riding the bike at 200mph he makes me look so chubby





:0

Mindboggling… but brilliant.

i just knew as i was typing that you'd already thought of everything possible, lol. agreed, that looks like a good plan. aesthetics play a big part provided functionality isn't compromised and of course it's not. one of if not the most thought out and planned builds i've read, car or bike.
neil.

Always pushing the envelope Will, as you say I doubt many, if any have as much parachute data as your collating

I was wondering if the back wheel will whistle with all those holes in the guarding

Chute attachment point seems sensible in as much as it shouldn’t have a negative effect on handling once deployed. I do wonder though if the launcher position would cause the chute not to deploy correctly?

mopar_mark wrote: Mon Mar 13, 23 10:44 pm I was wondering if the back wheel will whistle with all those holes in the guarding

Yes we think that also, not to mention it also looks like a washing machine drum lol

Blue wrote: Tue Mar 14, 23 4:47 pm I do wonder though, if the launcher position would cause the chute not to deploy correctly?

Hard to tell. We did launch the parachute in the wind tunnel, but the parachute caused so much drag it started to stall the wind tunnel (it didn’t sound happy as we tuned up the wind speed)

I would have liked to have simulated some blockage of the rear mudguard, but not possible due to inducing more drag into the wind tunnel.

Static in the garage, it fires the parachute around 3m in distance; what this is like a 200mph+, no idea.


Only one way to find out!





.

This is SO interesting.

My "feeling" without any access to the types of computer modeling available to you is that the chute could initially (depending on airflow and pressure over your own back, engine, and the chute itself) pull up on the rear wheel around 25-30 degrees before settling down. Maybe only for a fraction of a second.

If so will that matter in practice?

Might inspire somehow?

Dave-R wrote: Tue Apr 11, 23 12:05 pm Might inspire somehow?