Mitsubishi Raiden wing profile?

[blueskies]

A relevant report: NACA TM-1351 "On the Design of Airfoils in Which the Transition of the Boundary Layer is Delayed"

https://ntrs.nasa.gov/api/citations/19930093879/downloads/19930093879.pdf

And, from a AAF tech intelligence report:
View attachment 736094

Not exactly related, but this website has details on a different Japanese laminar flow airfoil; Tatsuo Hasegawa, Ki-94

 

[Aeroweanie]

Not exactly related, but this website has details on a different Japanese laminar flow airfoil; Tatsuo Hasegawa, Ki-94

Thanks - I'm working on deciphering it now.

 

[handrewkharisma]

All the wing thickness-to-chord ratios are within 10% in Tani's list.
LB55 looks closer to the J2M's now.

View attachment 364339

Dear shinpachi, where is it table came from? Is it book or report from proffessor tani. I would like to read the full book or report

 

[Shinpachi]

Dear shinpachi, where is it table came from? Is it book or report from proffessor tani. I would like to read the full book or report

Attached is the original text of -
Calculation of a symmetrical airfoil with the lowest pressure position afterward
by Dr.Ichiro Tani and Dr.Chikanori Noda (Tokyo University 1940)
(最低壓力位置の後にある對稱翼型の計算 谷一郎・野田親則).

This text is not availabe in the internet anymore.

 

[Aeroweanie]

Dear shinpachi, where is it table came from? Is it book or report from proffessor tani. I would like to read the full book or report

This report has a translation of Tani's paper

https://ntrs.nasa.gov/api/citations/19930093879/downloads/19930093879.pdf

 

[handrewkharisma]

So.. the J2M airfoil is considered as a symetrical laminar flow airfoil?

 

[wells]

No, it is not symmetrical. But they used symmetrical sections for wind tunnel tests, so it probably uses one of these symmetrical thickness distributions, wrapped around a camber line. It is mildly laminar flow at best, but still quite conservative.

 

[GregP]

As it happens, we have a J2M-3 Raiden at the Planes of Fame. I can't identify the airfoil. but I could probably do a thickness to chord measurement in the near future.
If I do, I'll do it near the root and near the tip.