Before calculations can be made, criteria must be gathered. Here is some raw data to chew on if you can stomach it:
https://www.howtallis.org/rosie-odonnell-height-weight-measurements/
I think Steve Eaves 1:10 Saturn V should be more than ample, assuming Rosie's head and torso would fit inside the upper stage. Can you imagine the screams? :rofl:
I would not expend good propellant to throw Rosie.
(wow, that sounds dirty, doesn't it?)
OK, to provide a semi-serious answer:
Person: 200 lbs
Chair: 100 lbs (for a decent shock-absorbing chair that will let you take 5G and not be too messed up, but definitely not a fighter pilot's seat)
Other stuff: 100 lbs (motor mount, chute, etc.)
Total: 400 lbs
5:1 thrust: 2,000 lbs or 10,000N
So a Cesaroni N10000 VMax should just about do the trick. Neglecting air resistance, that gets you to about 65 feet of altitude under power if my math's right. I wouldn't expect to get much more than about 100 feet, so expect a rough landing.
OK, I'll do the math and see if we come out the same.OK, to provide a semi-serious answer:
Person: 200 lbs
Chair: 100 lbs (for a decent shock-absorbing chair that will let you take 5G and not be too messed up, but definitely not a fighter pilot's seat)
Other stuff: 100 lbs (motor mount, chute, etc.)
Total: 400 lbs
5:1 thrust: 2,000 lbs or 10,000N
So a Cesaroni N10000 VMax should just about do the trick. Neglecting air resistance, that gets you to about 65 feet of altitude under power if my math's right. I wouldn't expect to get much more than about 100 feet, so expect a rough landing.
§101.23 General operating limitations.
(a) You must operate an amateur rocket in such a manner that it:
(1) Is launched on a suborbital trajectory;
(2) When launched, must not cross into the territory of a foreign country unless an agreement is in place between the United States and the country of concern;
(3) Is unmanned; and
(4) Does not create a hazard to persons, property, or other aircraft.
(b) The FAA may specify additional operating limitations necessary to ensure that air traffic is not adversely affected, and public safety is not jeopardized.
OK, I'll do the math and see if we come out the same.
Starting from the 400 lb (181.4 kg) mass and 2000 lbf (8.9 kN) thrust required for a good flight, rounding the thrust up to 10 kN sounds good. The N10000 gives 10347 Ns impulse. Ignoring air friction, the peak speed would be (10347 Ns) / (90.7 kg) = 57 m/s. It's peak thrust is 11564.5 N, giving a peak acceleration of (11564.5 N) / (90.7 kg) = 127m/s2, or 6.5 gees. Ouch.
The average thrust is not much less at 10219.3 N, so the average acceleration during the 1.01 s burn is 56.33 m/s2. Altitude at burnout is thus 1/2*(56.33 m/s2)*(1.01 s)2 = 28.7 m, or 94 feet.
Additional altitude from there is v2/2g = (57 m/s)2/2/(9.81 m/s2) = 165 m. The total altitude is then 194 m, or 636 feet. Reducing that for drag, I'd still expect to get at least 400 feet, and probably 500.
Can we have these figures done again by a third person to resolve the discrepancies, please?
Also, to TRFfan: DON'T TRY IT!
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