Flatnose progress
02-02-2010, 10:49 AM
#91
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Your rear lift (per this article) of 40Kgs at 160 mph translates to around 70Kgs at 200mph which is still plenty safe, considering that some street bikes have lift of 150lbs at 187mph, yet they are being driven at the Mile in the US at speeds way above that.
As a counterforce to rear axle lift, you have the mass transfer impact from front to rear rear axle, which albeit small at those speeds, is around 60Kgs (assuming 60% rear weight bias at standstill) at 190mph based on your vmax data.
Net net the impact is not that bad.
02-02-2010, 11:09 AM
#92
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Concerning the white RS record beater, if one was to calculate the impact of aerodynamic + rolling resistence (friction) drag at 218mph, we are around 600bhp give or take 20-30hp.. Therefore if we go by the numbers claimed by RS, the CD of that car should have been somewhere around 0.30 for a surface area of around 1.8sq.m. or less, assuming there still was "some" acceleration upon reaching the top speed.
Not far fetched given the sloped screen and other aerodynamic gizmos..
Not far fetched given the sloped screen and other aerodynamic gizmos..
Last edited by Jean; 02-02-2010 at 11:30 AM. Reason: Correction
02-03-2010, 06:59 AM
#94
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James, have you got pics of the heads showing how the cylinders screw in? This is all quite exciting, a brand new development allowing big boost! Can you elaborate on how you guys are going to deal with the cooling? Do the heads have some special oil cooling capability that normal heads don't, like a water jacket type thing, but for oil?
02-04-2010, 01:01 PM
#95
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What isn't pictured is the cylinder 'sleeve'. This is basically a cylinder that clamps around the liner. I have thought about cool things we could do to enhance cylinder cooling, but nothing more than air is planned currently. I suspect you'd want to spend the effort involved cooling the heads rather than the cylinder.
02-04-2010, 01:59 PM
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Oh, sorry, thought you were talking about the cylinder side of things. Heads have quite a lot going on accommodating the screwing liner and sealing detail. The rear vents on the wings flow much better than the standard turbo S vents, and the Marston oil coolers should be keep things in check.
The 962 had some pretty effective water jackets but that system is quite complex and would require a lot of work to accommodate the plumbing.
The 962 had some pretty effective water jackets but that system is quite complex and would require a lot of work to accommodate the plumbing.
02-04-2010, 03:27 PM
#98
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Are the heads RR350 alloy, or did you go for something newer? I know Richard mentioned to me once that there was a newer and better alloy but it was silly expensive.
Can we have more pics of the heads James, if you want to keep them off here for copying reasons then drop me an email
Hope it's all going to plan, Vmax isn't long off.....
Can we have more pics of the heads James, if you want to keep them off here for copying reasons then drop me an email
Hope it's all going to plan, Vmax isn't long off.....
02-05-2010, 09:11 AM
#100
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Really looking forward to seeing the car at v-max James, sounds a proper animal
Very excited for you!
Between JBL and yourself the air cooled flag will be proudly flying high at Brunters!
Very excited for you!
Between JBL and yourself the air cooled flag will be proudly flying high at Brunters!
03-01-2010, 01:05 PM
#102
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RC put his engine in so the new exhaust could be measured up. Inconel headers and SS "mufflers". I decided to drop the MoTec power distribution modules, as it seemed like over kill and money could be better spent else where.