Exotic Fuel for Aircraft and Rocket

i understand publiusr Idea,
but combine electric reaction wheels with electric Turbopump is not best option.
you need set of reaction wheels in different orientation for orbital use,
here the wheels rotate in different speeds for orientation change.
Turbppumps are either vertical or horizontal in Rocket long axe.
and run on fixed speed to feed the engines.
 
Thank you for the kind response--it can be good to look for dual use in equipment...a small toroidal tank in a tri-propellant set up might be a crushable structure to soften a landing when empty---a nozzle extension dropped before landing leaving the smaller nozzle for an ascent stage.
 
publiusr said:
Thank you for the kind response--it can be good to look for dual use in equipment...a small toroidal tank in a tri-propellant set up might be a crushable structure to soften a landing when empty---a nozzle extension dropped before landing leaving the smaller nozzle for an ascent stage.
Click to expand...
no. Crushable means none reuse, Toroidal tank hard to manage the fluids for a lander and no advantage for volume saving, what is the point of dropping the nozzle? And why tri-propellant? What is the point of all of it? There is no dual use in tank as a crushable structure, it would vent propellants

This is not how you throw stuff against the wall to see if it sticks. Suggesting random techniques to see if they help. First you have a baseline design with a set performance , then you tweak with specific changes that have a purpose in mind such as increase landed mass or reduce cost. each change has to be traded.

ISP, performance and lightweight are no longer drivers. Cost is everyting. That means nothing exotic, complex or expensive. Think mass production.
 
publiusr said:
a small toroidal tank in a tri-propellant set up might be a crushable structure to soften a landing when empty--
-a nozzle extension dropped before landing leaving the smaller nozzle for an ascent stage.
Click to expand...
why ?
small toroidal tanks are hard to empty, see issue the Soviets had with Block D on Proton rocket...
Loosing the nozzle is bad special if you on airless moon in solar system.
this is like Firefly Alpha 6th flight, were nozzle blow off the engine try it best,
but with out or litte nozzle the performance of Engine is dramatic reduce.
SpaceX use short nozzle were Payload is low mass, ULA used Nozzle extension for more Performance on RL-10

i understand you idea, publiusr
but this would only work for heavy cargo lander, that not need to return.
 
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