Superscooper 18 Discussion/Scoop Design

saul wrote: as i said it's out in yard smiley36

double braces internally. made box 18mm deeper in total to allow for 36mm baffle. this makes the mouth slightly bigger to 4028.35 cm^2 smiley16

if you want to get mouth even bigger, make baffle shorter, it can be as short as 495mm and still fit driver on nicely - that would make mouth 4134cm

36mm mouth brace.

thing is, at the throat, where you expect it to be, from bottom of baffle to perpendicular to the bottom of chamber, it's 124.9999mm, but then its the same distance from bottom of baffle down to the first angle perpendicular.

this means the first angle needs to be less steep, ya get mi

Much appreciated...

This "throat thing" is absolutely key.. :geek:

Maybe the first angle should be something like this:

[attachment=0:3uwq6b1c]<!-- ia0 -->throat_example.JPG<!-- ia0 -->[/attachment:3uwq6b1c]

just realized, staip has already done all the leg work smiley32

saul wrote: just realized, staip has already done all the leg work smiley32

Gotta be sure about throat start and compression though...

There's big difference between scoop designed to be small chamber/high compression, and one designed to be medium chamber.

Also not all folded horn design methodology applies to scoops.. Which is why SteveB fulls and shortman mini's are SPL merchants, even with negative expansion.

Mini: Build a Staip Mk1 with an 1851 in it. Thats a Mark ONE

nickyburnell wrote: Mini: Build a Staip Mk1 with an 1851 in it. Thats a Mark ONE

1851 not my cup of tea really.. Have heard 1850 in S118, and 1851 in RX18DC, and still prefer S11850 combo.

staips full scoop:


chamber is around 54.6L

and throat is around 127mm

saul wrote: staips full scoop:


chamber is around 54.6L

and throat is around 127mm

Cool.

Even though staip diag probably has perfectly uniform expansion, still prefer upright with tighter angle,

E.g smiley2

Levyt ive never designed a scoop, but do no sim programmes dont work with this kind of design, you said about compression ratio how do you work this out.

and is it this bit labled a and b that you are talking about......

bee wrote: Levyt ive never designed a scoop, but do no sim programmes dont work with this kind of design, you said about compression ratio how do you work this out.

and is it this bit labled a and b that you are talking about......

Scooper design is a wildly differing implementation from conventional designs, still following basic principles. Chamber, throat, horn path, Mouth.

TBH, all the original scoops were designed years ago by JBL, Eminence, Fane. Everything since then are derivatives of those.

IMHO, there is no fixed theory for designing complete scoop. You calc chamber volume to suit driver, match throat/compression ratio to driver, estimate correct looking horn path, and add decent horn mouth.

Build it well, also bracing the $#@! out of it.

Tony ASS is the premier Scoop authority on the Planet... smiley33

Lev, I follow exatcly your advice. Not copyed the staip design.
I modeled each section in a dynamical way, like cubo12 script. So I can change depth, height, width, distance from baffle to rear baggle, baffle lenght, rearbaffle lenght, panel under baffle and it's angle, panel in front of the rear panel and and it's angle.
Dynamic script as well, hardcore trigonometry and I can customize regarding driver. And this is the sim, tbx100 loaded.