Yep, my interest is already tweaked. I'll be working on this right away
because I am at the same stage. Look for updates soon!
mayf the rocket scientist
At 02:21 AM 11/16/99 -0800, Keith Turk wrote:
>Now where is Larry our Mathematician when you need him.... Case you folks
>don't know.... Larry Mayfield "Mayf" is a real life Rocket Scientist.... He
>doesn't live in Huntsville Alabama because that was the only place they
>would let him Park his Mobile home.... Kvack.... seriously Watch what
>Larry does with this.... He is building a DB/MS out of a Sunbeam.... and I
>have been monitoring his Progress on my occasional trips to Huntsville ...
>nice guy and he has a real nice mobile home... (two story brick exclusive
>neighborhood and so on) Super wife and so on...
>
>Larry has never run the salt... but like most of us.... he has always
>wanted to ... and as for my Turbo efforts.... Well it was Mayf that got me
>going down this road with his Logic and understanding of the systems...
>that and his ability to explain it in words I could understand.....
>
>Keith
>
>----------
>> From: Beth Butters <bbutters@dmi.net>
>> To: land-speed@autox.team.net
>> Subject: Cooling
>> Date: Monday, November 15, 1999 10:33 PM
>>
>>
>> I have finally found the information I needed to make an
>attempt at
>calculateing how much water I need to properly cool my motor. The latest
>edition of Circle Track has the best of S. Yunick which answered a
>question on cooling which got me going on this. So here goes. Given::: 1
>BTU is the amount of heat required to raise 1# of water 1 degree F. 1
>gal. Of gasoline weighs 6.5#s. 1 gal. Of water weighs 8.33#s. It takes
>1/2 # of fuel/ H.P./hour. 1/4 to 1/3 of the Btus released durring
>combustion are disipated thew the radiator or thew radiation. There are
>19,383 BTUs/# in the blue Erc A -8B 118 octane racing fuel or 127,940
>BTUs/gal. So, for every gallon burned you need
>127,940BTUx.3=38,382BTUs of cooling or 5814 BTUs /# . 800H.P. requires
>800H.P.x1/2#fuel/hr.=400#fuel/hr or 6.66#/min or .111#/sec. It takes
>approx. 110 sec to run threw the 5 mile at 220mph, full throttle from the 2
>mile on, so this is where you are really using the 800H.P. I try to correc!
>> t for this later on. 110 sec. Run X .111 #fuel/sec. = 12.21# of
>gasoline. You may use more than this because of running rich but I assume
>this is all the motor really uses to produce the power??????? Soooooo.
>12.21#s of fuelx19683BTUs/# =240,329BTUs X.3 (the amount released into the
>cooling system) = 72,099BTUs that you need to cool with water. Now 1 gal.
>of water wieghs 8.33 #s if it is iced to 40 deg. And allowed to raise to
>220 deg. There is a change of l80 degrees which would require
>180X8.33=1500 BTUs per gal. to raise it that l80 deg. So how much of a heat
>> sink (tank gallons) do we need.?? If the water was required to cool the
>entire 72,099BTUs we have Calculated we need to deal with ( please
>disregard the blue and underline I really don"t have a clue how to run
>this thing) 72,099 BTUs devided by 1500 BTUs=48gal. of water required.
>If we assume the first mile which takes approx. 36 sec to run (100mph.
>Avg.) the heat produced is used to heat up the block and bring everything
>up to operating temp. then we can changfe our calculation to a 75 sec run
>needing cooling. Therefor 75secsX.111#/sec=8.3# of fuel l9683BTUs/# X.3=
>49,158 BTUs devided by 1500 BTUs / gal. water= 32.77gal. required . How
>much for you car??? 32.77gal. devided by 800H.P. = .041 gal./H.P. or 4.125
>gal/ 100 H.P. I know this is more than most guys use , but I can't
>convince myself it's not what I need, Ive got a 40 gal. tank I'm mounting
>behind my seat in the Salt Hawk. L.Kvach Butters ending my longest typeing
>exersize in 30 years,..--------!
>> --
>>
>
>
L.E. Mayfield
124 Maximillion Drive
Madison, Al. 35758-8171
1-256-837-1051
old >>>>>>>> http://www.hsv.tis.net/~mayfield
new >>>>>>>> http://home.hiwaay.net/~lemayf
DrMayf@AOL.com
lemay@hiwaay.net <<<<preferred
Sunbeam Tiger, B9471136
Sunbeam Alpine Bonneville Land Speed Racer,
'66 Hydroplane Drag Boat (390 FE)
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