Engine Nacelle, Engine Pre-cooler and You (bug with cooling)

[M1A1]

Hello everyone!

In Engine Pre-cooler description says: "Improves jet performance by pre-compressing and rapidly cooling the intake air". "Sounds cool" - I thought and started to test it.

The first qiuck test showed me that there is no difference ( http://i.imgur.com/MihTNHl.jpg ). "Okay" - I thought - "Maybe, if it was called "Pre-cooler", it will cools the engine?".

The second test showed that it heats up the engine! Engine and detals, that are close - http://i.imgur.com/LmTD4CU.jpg

Well, it's too synthetic test - I thought - it should be check on a normal plane. But all measurements showed that this part is heated engines! http://imgur.com/a/V0Nvl (Yes, it was a long flight)

Another point was detected in flight - ISP engine is not as specified. As you can see in the screenshots, when ISP = 19200 I could fly 11.5 hours. But after 20 minutes of flight time is rapidly reduced to 4.5 hours. I have no reason not to trust this mod, also from my own experience I know that 19k ISP is very much. It is almost 5 times more than the ion engine!

The next test that I did - check Pre-cooler with another engines, not jet. For the purity of experiment I chose the most hottest engine - LV-N.

The test showed that the bug is observed with other engines. Not only on surface, in space too (paradoxically). http://imgur.com/a/ptsXG

That's all I additionally checked without mods, i got the same result.

All this is tested on KSP 1.0, Win 8.1 x64.

Crafts - https://www.dropbox.com/s/rcn6p5rfdel67w1/SPH.zip?dl=0

P.S. I'm not an English speaker, sorry for any errors.

[Ronnieuk]

Used to be able to drag the nacelles over rockets and it would surround the engines with fairings and cool them. Is there a reason they changed that too?

Edited May 1, 2015 by Ronnieuk

[sal_vager]

It's just an intake/fuel tank combination, it is the old radial engine body with a new model and texture.

The only cooling effect is that it provides somewhere for engine heat to pass to.

[eddiew]

It's just an intake/fuel tank combination, it is the old radial engine body with a new model and texture.

The only cooling effect is that it provides somewhere for engine heat to pass to.

Thanks for clearing that up, I think there's a lot of people wondering about it But if that's the case, this part is poorly named and giving the impression that it doesn't something which it doesn't :/ Intake air is so rarely the problem now that it's a pretty pointless part without any actual cooling effect, imho... Oh well, least I know to leave it off things now.