Jet Engine Thrust

[CipherNova]

I'm currently building a almost 1:1 scale of the Northrop Grumman B-2 Spirit. Im trying to make it as realistic as possible while also allowing it to function well in game. My current issue is that IRL the plane has 4 engines (which i have) but it's max speed listed is 550 Kn. Mine can only do about 340 Kn. Anyone have any advice on how i can get more speed that isn't "lighten the aircraft" or "add more engines". Thanks!

[Bane882266]

Well...No...If you post it to the workshop I can try to squeeze more power out of the engines as I'm familiar with tuning jet turbines.

Option 2
if you really care about the Speedo just saying 550... You can just use a multiplier between your speed detector and airspeed indicator I can try to do both if you upload it to the workshop.

[Ra-Ra-Rasputin]

It depends on a few factors, like how much space you have to spare.

You can remove the compressor from the jet engines to make it much more difficult to start, but overall produce much more power once it begins moving properly. The downside is that it generally needs either a helper car or an internal generator to help start the jet engines.

You can also use larger intakes to rob some of the power from the jet thrust in exchange of getting pull from the turbofans. There are also unconventional setups, like using 2 combustion chambers with a pre-combustion chamber to increase the pressure for a second combustion chamber which is something you control with a throttle.

I can probably make just about any plane hit 550kn. :)

[CipherNova]

Originally posted by Ra-Ra-Rasputin:

It depends on a few factors, like how much space you have to spare.

You can remove the compressor from the jet engines to make it much more difficult to start, but overall produce much more power once it begins moving properly. The downside is that it generally needs either a helper car or an internal generator to help start the jet engines.

You can also use larger intakes to rob some of the power from the jet thrust in exchange of getting pull from the turbofans. There are also unconventional setups, like using 2 combustion chambers with a pre-combustion chamber to increase the pressure for a second combustion chamber which is something you control with a throttle.

I can probably make just about any plane hit 550kn. :)

So if i remove the compressors and give them starting generators i can squeeze a lot more power from the jets? I'll give that a shot. I don't entirely understand the pre-combustion set up but that sounds like burning more fuel, which i already don't have enough of as is.

[Ra-Ra-Rasputin]

By generator i mean an aggregate generator here, as in, a combustion engine to force a jump-start of the engines in place of compressors. Alternatively you can use electric engines, but their drain is fairly heavy to get 4 engines up to desired speed.

Compressors reduce the overall air pressure the engines can take in at speed (as they reduce the diameter the air can travel through), drastically reducing the amount of thrust they can produce, but they do have high benefits of being able to self-start the engine and being able to supply better power delivery and faster spooling at low revs.

It's very much a trade-off. Removing the compressor essentially makes it a ramjet style jet engine (though you still need the intake prop in place for it to work).

You could also try mixing and matching. Have 2 of your engines be compressor fed and the other 2 function as described here.

[CipherNova]

Originally posted by Ra-Ra-Rasputin:

By generator i mean an aggregate generator here, as in, a combustion engine to force a jump-start of the engines in place of compressors. Alternatively you can use electric engines, but their drain is fairly heavy to get 4 engines up to desired speed.

Compressors reduce the overall air pressure the engines can take in at speed (as they reduce the diameter the air can travel through), drastically reducing the amount of thrust they can produce, but they do have high benefits of being able to self-start the engine and being able to supply better power delivery and faster spooling at low revs.

It's very much a trade-off. Removing the compressor essentially makes it a ramjet style jet engine (though you still need the intake prop in place for it to work).

You could also try mixing and matching. Have 2 of your engines be compressor fed and the other 2 function as described here.

Thank you for the clarification. I think i'll try the mix as it's easy for my plane to take off at low speeds so initial power isn't a big problem.