On Jan 22, 6:45*am, Tony wrote:

I think it's worth noting that Part 45 only applies to aircraft built
under a type certificate.

I don't think that's correct. Here's what § 45.1(a) says:

§ 45.1 Applicability.
This part prescribes the requirements for—

(a) Identification of aircraft, and identification of aircraft engines
and propellers that are manufactured under the terms of a type
or production certificate...

The way I read that § 45.1(a), the first "and" means that part § 45
prescribes the requirements for both the identification of aircraft
_and_ the identification of certificated engines and propellers. Note
that the way that sentence is constructed, the qualifier "manufactured
under the terms of a type or production certificate" does not
necessarily apply to "aircraft," so it could be construed as "all
aircraft."

I admit that paragraph (a) might be a bit ambiguous, and I think that
it would be better if it was broken out into two paragraphs, something
like:

(a) Identification of aircraft.

(b) Identification of aircraft engines and propellers yadda yadda...

However, I'm personally convinced that § 45.1(a) means that all of
Part 45 applies to experimental as well as certificated aircraft. That
seems to be the consensus in the RV-series homebuilt aircraft
community, I think that pretty much all of them carry external
dataplates.

Thanks, Bob K.
www.hpaircraft.com