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- Jun 19, 2015
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Hi all,
I am designing a booster for a BT70 sized rocket, and am wondering if there is a 'rule of thumb' for the length of the coupler into the sustainer?
From doing some research, it appears to be 3/4 - 7/8 of the diameter, at least for fiberglass. This is a 2.5- 2.625" length for a 3" fiberglass BT. I am building paper rocket, standard Estes BT.
I plan to use/make several boosters in the future and wondered what people are doing, irregardless of direct ignition or airstart on sustainer.
PS> Happy New Year to you all. OH, time to redo signature for this years stats. Flown 3, Lost 0, Tree'd 0.
I am designing a booster for a BT70 sized rocket, and am wondering if there is a 'rule of thumb' for the length of the coupler into the sustainer?
From doing some research, it appears to be 3/4 - 7/8 of the diameter, at least for fiberglass. This is a 2.5- 2.625" length for a 3" fiberglass BT. I am building paper rocket, standard Estes BT.
I plan to use/make several boosters in the future and wondered what people are doing, irregardless of direct ignition or airstart on sustainer.
PS> Happy New Year to you all. OH, time to redo signature for this years stats. Flown 3, Lost 0, Tree'd 0.