Talk:P120C
Add topicLatest comment: 1 year ago by Demon.michael in topic Wall thickness looks odd
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Was there ever a P120 or did it start as P120C
[edit]If no P120, or not notable, could rename this article to P120C ? - Rod57 (talk) 19:32, 2 April 2022 (UTC)
- The article originator used the same disambiguator as for the earlier P80 engine. However, the P120C has only used this name and does not require disambiguation. It was now been moved over the redirect and corrected. Ng.j (talk) 21:07, 27 September 2024 (UTC)
Wall thickness looks odd
[edit]The motor's 25 centimetres (9.8 in) thick walls
25 centimetres is very thick. Is this the correct number? With a 3.4m width and 13.38m length, the shell volume would be about 33.1m3. Shell weights 13,393 kg, so average density is 404.6 kg/m3, only 40% of water density. If the thickness is 25 millimeters, the density would be 3.776 t/m3 - a lot closer to the average density of CFRP and steel. Space shuttle SRB had 2cm thick walls made of steel - Demon.michael (talk) 01:12, 30 April 2025 (UTC)