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-   -   Mark II how important are you?? (http://www.oldrocketforum.com/showthread.php?t=2903)

shockwaveriderz 11-05-2020 01:41 PM

Mark I and II Rock-A-chutes
 
https://airandspace.si.edu/collecti...sm_A19930773000

https://airandspace.si.edu/collecti...sm_A19930777000

https://www.thingiverse.com/thing:4332295

Tedster 11-05-2020 02:45 PM

Thank you Shockwaveriderz!!! I wonder why, in the first series, there appears to be nothing in the engine section for the Mark 2 when viewed from the bottom? It's rocket body tube is BT-50ish but I don't see any trace of the hardwood engine mount. On the side is the launch lug which I understand is a empty engine tube which would rattle around in the tube as it is.

Royatl 11-08-2020 10:49 PM

Quote:
Originally Posted by Tedster
Thank you Shockwaveriderz!!! I wonder why, in the first series, there appears to be nothing in the engine section for the Mark 2 when viewed from the bottom? It's rocket body tube is BT-50ish but I don't see any trace of the hardwood engine mount. On the side is the launch lug which I understand is a empty engine tube which would rattle around in the tube as it is.



Look very closely and you'll see just a sliver of the engine mount (it would be about an inch deep).

I bet it was that way because the casing expanded with the compression, and he used that to his advantage, giving the motor mount something to grip (the expanded casing) without having to put tape around it.

shockwaveriderz 12-19-2020 12:13 PM

1 Attachment(s)
Here's a drawing with dimension from GH Stine in 1970


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