Type certified?

[CAPFlyer]

The B377 and C97 both have type certificates. They are held by Hawkins and Powers which is probably why it wasn't in your initial search - A5NM , A7NW

As for the DC-3, any military variant of the DC-3 can be certificated under the DC-3 Type Certificates if modified in accordance to the TCDS. On A-669 which includes the C-47 variants, NOTE 8 lists the required modifications. A618 covers the rest of the models (mainly C-49/C-50 variants that were impressed into military service).

[exhaustgases]

I read somewhere that some of the old war bird engines were not type certified. C-97 has some different parts in the engines than the old stratocruiser.
So does not being type certified mean as such that they are not under FAA control?

[Archer]

Thanks CAPFlyer, I hadn't thought to look under H&P!

You could argue that a type-certified product conforms to more stringent requirements than a product that is not in accordance with an existing type certificate, but both are under FAA control in some way. I'm sure someone else can provide you with an answer that makes more sense.

[CAPFlyer]

I read somewhere that some of the old war bird engines were not type certified. C-97 has some different parts in the engines than the old stratocruiser.
So does not being type certified mean as such that they are not under FAA control?

While most military variants of the engines used in many warbrids are/were not Type Certificated, that doesn't mean they can't be. There are several versions of military R2800 that have been type certificated as have several versions of R1830. Basically, just about any aircraft or engine certified airworthy in some way can get a Standard Type Certificate as long as you can prove to the FAA that the design and construction of that aircraft or engine fully complies with the relevant certification criteria (either Part 23 or Part 25). This requires a TON of paperwork, and usually some sort of flight test program to prove to the FAA that it complies with all the safety requirements. This is why aircraft like the C-97 have certificates. The thing is that today this process costs a TON more than back in the 1950s or 1960s simply because the cost in fuel and operation of these aircraft has gotten so high. Back then, many of these planes were plentiful and at minimum the engines were, so there wasn't as much worry about taking complete care of the equipment since they could inexpensively repair/replace anything.