- Joined
- Jun 4, 2019
- Messages
- 275
- Reaction score
- 59
Recently got a Boosted Bertha kit and like it very much.
I am completely familiar with Big Bertha having built at least 3 of them. But there are some differences.
First of all the booster stage. It has through the wall fins and centering rings with baffle holes in them. The rocket is gap staged! Never have done a gap staged rocket before this is a cool 'feature'.
The launch lug location is different from the BB as it is down on one of the fins of the sustainer.
Engine retainers are the plastic thread on type in lieu of the engine hook. Which is great!
One question though. The instructions indicate to use plastic weld cement to attach the engine retainers on to the motor tubes. Would not epoxy be a better choice for this?
Also wont the plastic retainer in the sustainer get melted when the booster section burns through?
Thanks!
I am completely familiar with Big Bertha having built at least 3 of them. But there are some differences.
First of all the booster stage. It has through the wall fins and centering rings with baffle holes in them. The rocket is gap staged! Never have done a gap staged rocket before this is a cool 'feature'.
The launch lug location is different from the BB as it is down on one of the fins of the sustainer.
Engine retainers are the plastic thread on type in lieu of the engine hook. Which is great!
One question though. The instructions indicate to use plastic weld cement to attach the engine retainers on to the motor tubes. Would not epoxy be a better choice for this?
Also wont the plastic retainer in the sustainer get melted when the booster section burns through?
Thanks!