Breedlove 800 MPH in 2013?

[TD]

Rosco McGLashan says the Aussie Invader 5R will go from 0 to 1000 MPH in 20 seconds. Seems like to me a driver mite pass out at those G-Forces. Mite need a remote shut down.

Assuming constant acceleration (probably unrealistic but that way we can use linear algebra!):

LSRV:

V = Vo + at
1000 MPH = 0 + a * 20 s
a = 50 MPH / sec => 22.35 m/s**2
22.35 m/s**2 / 9.8 m/s**2 = ~2.3 G average

Dragster:

320 MPH = 0 + a * 4.4 s
a = 72 MPH / sec => 32.19 m/s**2
32.19 m/s**2 / 9.8 m/s**2 =~3.3G average

Tim

[Stan Back]

What'd he say?

[Captthundarr]

He said one is fast the other is quick.

[Blue]

Rosco McGLashan says the Aussie Invader 5R will go from 0 to 1000 MPH in 20 seconds. Seems like to me a driver mite pass out at those G-Forces. Mite need a remote shut down.
Richard

For the record, the 1996 pass that suffered the fastest U-turn in history was caused by a steering instability: zero trail, adverse roll.  The on-board data recording of the front wheel speed peaked at 675 mph. The acceleration rate and wheel well drag vs. traction and well inertia at that point in the run mitigate to the 675 mph reading being within 1% of vehicle speed.

The G-forces that all of the ALSR teams are worried about surprise me.  3G???  For 199 missions with over a dozen pilots, the X-15 accelerated at over 5 G for 10 to 30 seconds depending on mission profile.  Fighter pilots in ACM (air combat maneuvering) suffer 7 to 8 G for 30+ seconds to gain an angles advantage.  Unlimited aerobatic pilots will go from +8 G for 20 seconds to -6 G for 10 seconds, then flip between the two.  All the while these pilots are holding precise profiles with far more control input than is typical in land racing.

If we sit the driver upright so that the G force has little effect on their upper body blood pressure, they would be able to handle significantly higher acceleration and deceleration G while still maintaining active control of a car.  The research that the Air Force did after WWII into G vs. human capability proved this 50 years ago.  Look it up.

G capability needs to be trained, just like any physical activity.  Every fighter pilot and aerobatic pilot will tell you this if you ask.  One of the things missing from all of the ALSR programs is any kind of simulation for the drivers to build G tolerance.

[Jack Gifford]

... One of the things missing from all of the ALSR programs is any kind of simulation for the drivers to build G tolerance.

How coincidental, that I just finished reading about Art Arfons spinning himself around in a DIY backyard centrifuge- darn near half a century ago!

[F104A]

Eric is right, developing a tolerance for the G forces takes training and keeping in good physical condition. In our F-104
the seating is mostly vertical (just a slight recline). In some of the cars, they are expecting the driver to lay prone. Perfect
situation for a redout under a heavy G load for an extended time. Also gives you a heck of a headache!

[Robin UK]

One of the things missing from all of the ALSR programs is any kind of simulation for the drivers to build G tolerance.
[/quote]

Not true. Apart from a working lifetime flying fast jets, Andy Green has been G tolerance training since 2010 using a BloodhoundSSC run profile and an aerobatic plane - his weekend "for fun" flying.

http://www.looptv.aero/LTVCategory61/2445/ANDYGREEN%E2%80%93WORLDSFASTESTMAN.aspx

Robin

[Seldom Seen Slim]

Narrating the whole time!!!

[Tman]

Dudes got ice water in his veins!

[sabat]

That was bada$$!  Andy Green FTW.

[Paul.n]

One of the things missing from all of the ALSR programs is any kind of simulation for the drivers to build G tolerance.

Not true. Apart from a working lifetime flying fast jets, Andy Green has been G tolerance training since 2010 using a BloodhoundSSC run profile and an aerobatic plane - his weekend "for fun" flying.

http://www.looptv.aero/LTVCategory61/2445/ANDYGREEN%E2%80%93WORLDSFASTESTMAN.aspx

Robin
[/quote]

Sorry I had to but in here, didn't read the rest of the thread, will do after posting this. The Bullet Project is working on acclimatising Driver Paula and bringing her fitness levels up to strength in preparation. We are working with a biomechanics professor to attain how the body will react with g forces and to attain the best driver seating position that will reduce the risk of blackout.

The RV1 is now half the weight it used to be and is only 9.15 meters long as design stands today. Our expected track length is to be 11 miles inclusive of safety factor and therefore the G forces The RV1 will be pulling will be significantly higher but for a shorter time span.  We have an option of using Australian built,  Lox Kerosene engines already tested and available to us or continuing with the development of a hybrid engine as used by bloodhound but on a much larger scale. The hybrid is still in development stage and has not to date been tested for use with a human being on board so this option is a long way off but still in the pipeline.

The team is gathering strength and development is way beyond almost all of the other challengers in the running today. It is our choice not to run newsletters at present or update our website more frequently due to limited assistance within these areas, Our priorities lie in the project objectives which are mainly research and development of it's vehicles.

I did offer to place updates on here in the past but there seemed to be a lack of interest and therefore haven't done to date

If anyone is wondering, I have posted before under the name Healewis

Paul   

[dw230]

Is that 11 miles run up to the timed mile(23 miles total? Or, 11 miles with the timed mile in the middle, 5 mile run up on each end?

DW

[F104A]

Well, I do fly my own airplane but I haven't tried what Andy did. Doing things like skiing, flying, racing and those sorts of things
keeps you sharp and conditioned.

[Paul.n]

Is that 11 miles run up to the timed mile(23 miles total? Or, 11 miles with the timed mile in the middle, 5 mile run up on each end?

DW

As things stand the RV1 will reach the timed mile in 4 miles estimating 6 miles to stop. There was an error in the racecar engineering article about the weight of RV1, it is actually designed to weigh in at 2,720kg/6000lbs fuelled not as printed 6000kg.

[Dean Los Angeles]

Andy Green has to work on his confidence. He is sooo shy. 

That is the true mark of a professional. Just like a duck, calm and cool on the surface, paddling like hell underneath.

I remember an interview years ago with a female aerobatic pilot talking about training before the season started.
I don't remember her name, but I certainly remember her comment that the early training keeps the bleeding in her eyes to a minimum!