Joe Scheil wrote:
Great topic. Everyone likes this!
Thanks! Glad you think so!
Joe Scheil wrote:
If a manufacturer like Boeing happened to own the NAA P-51 “rights” and decided to make them from new as NAA Boeing P-51B-10 airframes for example, they are a continuation of production by the auspices of the original manufacturer.
Oh boy, don't get me started on
Boeing claiming the P-51 as part of their "heritage".

Seriously though. You reminded me of an attempt I made to try to determine at what point an aircraft should actually be considered a new model by laying out all the different scenarios. The subject is a bit different since it deals with the issue of model instead of replica/reproduction, but I figure that it is related enough to copy/paste my notes here:
Noha307 wrote:
Aircraft Name Change Hypotheticals- Company “A” designs, builds, and develops an improved version of an aircraft.
- Company “A” design and builds an aircraft. Company “B” buys company “A” and develops an improved version of the aircraft.
- e.g. Boeing E/A-18G Growler
- Company “A” designs and builds an aircraft. Company “A” changes its name and develops an improved version of the aircraft.
- Company “A” designs, builds, and gives company “B” a license to build an aircraft.
- Company “A” designs and builds an aircraft. Company “A” changes its name and continues to build the aircraft, but does not develop an improved version.
- Company “A” designs and builds an aircraft. Company “B” buys some of the completed aircraft and remanufactures them.
- e.g. Twin Navion, Bay Super V
- Company “A” designs and builds an aircraft. Company “A” goes out of business. Company “B” buys the production rights to the aircraft and restarts production of the same version.
- Company “A” designs and builds an aircraft. Company “A” goes out of business. Company “B” buys the rights to the aircraft and restarts production of an improved version.
- e.g. Viking Air DHC-6 Series 400
- Company “A” designs an aircraft. Company “B” builds it.
- Company “A” is bought by company “B”. Company “B” continues to operate company “A” as a division of company “B”. Company “A” then designs and builds an aircraft.
- e.g. Boeing-Stearman Model 75
- Company “A” builds an aircraft. Company “B” buys company “A”. Company “B” buys back some of the aircraft built by company “A” and remanufactures them.
Owning a type certificate would seem to confer legitimacy in naming. However, the Federal Aviation Administration's rule that the manufacturer is whomever completes more than 50% of the work on the airframe seems to contradict this.
David H. Marion has written two absolutely excellent articles about when an aircraft should be judged to be one make and model or another.
[1][2] They are a great look into an only rarely discussed aspect of aviation. Unfortunately, given his background as a mechanic, he only considers one potential arbiter of aircraft names – the FAA. However, looking at it from a historical – and not just a regulatory perspective – there are other sources of legitimacy.
Joe Scheil wrote:
As an aside; The Flugwerk “run” is more of a kit plane/replica as it is not authentic to the original structure, engineering or powerplant of the original. It’s not a new build 190, but a plane sold as a kit that replicates the look of an Fw-190. It is not authentic in many respects to the original.
I don't want to take this thread off topic, but to the best of my knowledge, the Flug Werk reproductions are (poor manufacturing quality aside) actually pretty authentic in terms of their structure. Except for the powerplant, wiring, and instruments, there is not much that is different (at least before any modifications by owners).
That being said, I do struggle to come up with a term to describe the work to complete the Flug Werk projects, as "restoration" is not an accurate descriptor since there are very little to no original parts.
Joe Scheil wrote:
The term reproduction generally applies to parts, for example, with a vintage Corvette a reproduction quarter panel or seat cover that accurately matches a 1967 part but was or is newly made is a reproduction.
So, if I understand what you're suggesting, it is that the term reproduction should apply only to parts?
shrike wrote:
FWIW, in the old school automotive world, a replica was made by the factory, a reproduction was made by an owner.
This is exactly the type of distinction I was looking for. Thanks.
GRNDP51 wrote:
Joe, the "new-build" Yaks that took over where the old numbers ended (or however the story goes) where do those fall in?
Coincidentally, if I were to use the strict definition of "reproduction" I mentioned above, they would be other warbird example that would be closest to qualifying. However, again, that is not really a definition anyone uses.
What's interesting to me is that, IIRC, the "new-build" Yaks were built with the help of some of the original factory workers. This would seem to confer additional legitimacy as "reproductions" since they would be constructed using the original techniques. (Which is something over and above modern restorers doing it according to the manuals. cf. Joe's comment about "defects") There is a reason that museums like NASM sent airframes back to be restored by original workers like those at
Vought and
Grumman.
Joe Scheil wrote:
Excellent link, thanks for sharing!
What's interesting to me is that it contradicts shrike's automotive definition of a replica above, as in that case a replica was made by the factory, while according to the EAA a replica was
not made by the factory.
Joe Scheil wrote:
What is interesting is that a Flug Werk Fw-190 would not qualify as a replica in this definition as it does not conform exactly to the manufacturers plans.
What category would a Flug Werk Fw 190 fit in? Or does it not fit in any of the categories? (Which I assume would make it ineligible for the competition.)
Joe Scheil wrote:
However a new build P-51, like “Lope’s Hope” did.
Again, not to go off topic, but I've never been quite clear what the starting point for Lope's Hope was. I'd always assumed that there was some small part of a carcass they based the restoration on, but I've never known for certain.
JohnTerrell wrote:
To me, the terms "reproduction" and "re-manufacture" are much more fitting and accurate when used to describe a new-build warbird, since it speaks to the fact that the parts/airframe have been re-produced to original production spec - not just a likeness, but the exact same as any other originally-produced example. I know certain other individuals feel the same, as I've seen some people on forums purposefully use the term "replica" in a derogatory/defamatory manner, rather than use another term like "reproduction" or "re-manufacture". Another term I like is "clone", which I also feel properly respects the work done/effort gone into making an exact copy. When it comes to all of the new-build P-40's, Mustangs, Spitfires, what have you, with original ID's attached, I also like the phrase that Jim Harley has used, that being that the aircraft is a "ghost of" the previous aircraft for which it claims to be.
Interesting, what you're saying seems to jive with the suggestion I've seen elsewhere that the distinction is that reproductions are more authentic than replicas. (I ran into it when talking about Avro 504s with John Gaertner of
Blue Swallow Aircraft.)
The thing about "re-manufacture" is that it is a term that is used to refer to airframes that have undergone significant amounts of rework during their original service careers – usually to zero-time the airframes. (e.g.
F-14D(R) or
C-45G/H) For that reason I feel like it could be confusing.