Posted by gillispie on 9/28/2012 12:34:00 PM (view original):
Posted by timhunter44 on 9/28/2012 12:10:00 PM (view original):
I know I am going to get clobbered for this question, but how inefficient are CVs versus HVs at less than 250 miles in D1? I never even bothered to think about it before.
clobbered? i should hope not.
the real question here is, what is a CV worth in terms of HVs? and the answer you will get is the same for d1, d2, d3. at 250 miles, a HV is worth about 400, and a CV, around 1000 (thats really at 200 miles, but im sure that is close enough - you can check exactly the amouts if you like, takes about 2 seconds if you have a recruiting going, which i dont). that suggests that if a CV is worth 2.5HV, you could go either way.
on the forums, people generally believe in CV:HV values somewhere between 2 and 2.5. if its 2.5, you are fine. I am firmly in the 2:1 camp, which means with 2 HVs, you get the same effort for 800 that you could get for 1000 - meaning CVs waste 20% of your money. so its somewhere in there - based on popular opinion, using CVs are anywhere from even to wasting 20% of your money.
Here is the break even points for the following CV/HV ratios:
2.0 HV/CV - 360 miles is the break even point:
360 miles: 2.0 x 446 = $892 (HV), and CV is $1044
370 miles: 2.0 x 749 = $1498 (HV) and CV is $1265, so at 370 miles, 1265/749, or 1.69 HV/CV, this means that above this mileage, CVs are surely more cost effective.
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The costs at 360 are HV=$445 and CV=$1045, so 1045/445 is 2.35 ... so if one thinks the HV/CV ratio is 2.00 to 2.35, the break even point is 360 miles.
The costs at 200 miles are HV=$415 and CV=$1025, so 1025/415 is 2.47 ... so if one thinks the Ratio is between 2.47 to 2.35 then the break even point is somewhere between 200 and 360 miles.
If one thinks the ratio is 2.5, then the break even point is somewhere under 200 miles and can be calculated by this equation:
2.5 (300+x/5) = 800 + x/5
750 + x/2 = 800 + x/5
Multiple both sides by 10 to use whole numbers and you get:
7500 + 5x = 8000 + 2x
3x = 500
x = 500 / 3
x = 167 miles
So ... If you think the ratio is 2.0 ... the Break even point is 360 miles.
If you think the ratio is 2.5, the break even point is 160 miles.
If you think the ratio is somewhere between those numbers the break even point is between 200 and 360 miles.