LF rotors use fuel way too fast (SOLVED)

[JMBuilder]

Just something I noticed pretty quickly with the new LF rotors. They use fuel REALLY fast. There's really no point in using them over jet engines.

EDIT: Motor output reduction solved everything.

Edited July 14, 2019 by JMBuilder

[aruoch]

maybe the best places to use the fuel helicopter parts are on things that are pretty aerodynamically potato and massive, and can replenish their fuel. for instance like if you sent a superheavy mining operation to laythe you could put a giant rotor on it that folds away, and it wouldn't matter that you'd used a bunch of fuel every time you moved it because it's constantly mining more at each deposit for your exploration vehicles to use.

 

basically i'm imagining a huge block that would fall out of the sky if it was lifted by jets

[JMBuilder]

Thing is, I was hoping for LF rotors that could be used like real-life rotors without the fuel consumption of a rocket.

I can't build a normal propeller plane.

[OHara]

The selectable motor size in the VAB is 100% by default, but 5% is appropriate for a single-engine light aircraft, and then I get 7 hours range from  one Mk1 tank.

[JMBuilder]

Just now, OHara said:

The selectable motor size in the VAB is 100% by default, but 5% is appropriate for a single-engine light aircraft, and then I get 7 hours range from  one Mk1 tank.

I literally just now figured this out. Problem solved. 

[Pds314]

Also if you don't need 460 RPM, reduce it to what you do need. 230 RPM is a common rev rate for top speed props, and that's 50% the fuel consumption if you actually hardlimit it.

[LMksp]

I'm a newbie - Orbited Mun but not landed yet..  

I really want to use the R121 - and the hints here are encouraging..

Even though this thread is old, I'm hoping someone can point me to a tutorial (for dummies) on get this engine to even WORK.  Everything I do just has the engine sit there on the runway and nothing happens.  I read about changing the throttle assignment and blade pitch, but I guess I'm confused where to do that?  I guess I just need a step-by-step

 

Thanks!