Re: Don't forget about the boner.....

Mikey Antonakakis /

So I did a ton of thinking through that, JBOT. Did a million Helmholtz calculations, didn't get a conclusive answer (pipes aren't typical Helmholtz resonators, calculations require a lot of assumptions).

In short, I just ran it through the sim. All three of these are new sims, with only one variable changed: pipe length. I added 70mm to both, but one right at the header, and one right at the belly. Frits is correct, at least for this engine. Same tuned length change makes a bigger difference if you do it at the header rather than by moving the end cone.

stock_belly_header.png

Re: Don't forget about the boner.....

Megasaurass wRexckses /

Telescopic boner!

0EDCDC51-3D59-4109-B70F-07EF93D23B95.jpeg

Re: Don't forget about the boner.....

Yeah I don't claim to know. Just got my intuition but it's not always right

Re: Don't forget about the boner.....

Mikey Antonakakis /

You definitely weren't wrong, it's just super complicated. Sometimes it might be better to extend belly, sometimes header, in this case header won.

Re: Don't forget about the boner.....

Megasaurass wRexckses /

Screw-on boner

E1C32329-74E9-4F87-8CE4-7FD25AC26F7F.jpeg

Or syringe boner ?

F91D227B-9A66-4FBD-B462-43C1DBAFC237.png

Re: Don't forget about the boner.....

Scooter wins.

« Go to Topic — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account