B-26 Engineering Data/Technical Information (From Martin's Own Blueprints)

[Maty12]

What a job you took on.

It is gonna take a while to say the least, lol

I find this one interesting as when we recovered the three B-26's from near the Liard River in Canada they all had metal flaps. All three were B-26 period aircraft.

View attachment 808683

That one's on me, I should have clarified when the wooden flaps were introduced as the case history skipped over it. Wooden flaps were introduced on the first B-26C along with the new long wing and only 50 sets were manufactured before it was decided to switch back to metal. They were only fitted to B-26C-5s 41-34673 through 34722. All Baltimore-built B-26s had metal flaps, as did all B-26Cs manufactured after these 50.

I do plan on eventually making just one large sheet that includes all changes (even the ones the case history skipped).

 

[MiTasol]

Thank you.

 

[Maty12]

Spent the past hour and a half trying to find a source for a claim I had written down only for it to turn out to be right in front of me. While I haven't seen a reason given for switching to wooden flaps, the reason for switching back to metal flaps is given on page 996 of the case history:

"4 December 1942- B-26C, contract 19342. Contractor proposes to change from wood to metal wing flaps. Authority for purchase 333910 written for 1150 airplanes" (p. 994)

"9 March 1943- Contract 19342, B-26C. Authority for Purchase 333910 for 1150 metal wing flaps initiated by J. H. Carter, Major, Air Corps. Authorized - unsatisfactory performance of wood flaps on A-30 airplanes" (p. 996).

The 1150 were off the initial B-26C contract for 1200 airplanes. The B-26C's 3-view drawing lists the parts numbers for both kinds of wing flaps, and lists the GLM production numbers and USAAF serial numbers for the aircraft fitted with each type.

 

[MiTasol]

Thanks.

I must admit I had to search to find the A-30 was the Martin Baltimore in US service.