Chuck wrote:

Here is a Grumman for sale, it has a Mazda engine

http://barnstormers2000.com/show_referred_ad.asp?ID=68377

I think the FAA only allows it in the experimental category for
a limited amount of time. They like to discourage people from
putting certified airplanes in the experimental category.
I think they are afraid people will circumvent the certified

airplane

maintenance rules to save money.

Paul Lamar

Mike Collier wrote:

Paul, can the FAA force him to take it out of an experimental

category.  How

can they do that?

Mike C.

I am not an FAA lawyer so take this as IMHO.
I am not sure what you mean. If he does not fly it they can do

nothing.

If he wants to get it certified he must get the engine certified and
that would be nearly impossible using Mazda parts. One needs a QC

paper trail

on every part.  If he wanted to copy the Mazda engine and make every
part himself then he could get the engine certified and possibly an
STC for installing the engine in the Grummun. On the other hand he
could take the Mazda out, replace it with the aircraft engine it
came with, get an annual and then put it back in certified service.

Paul
A friend of mine who is a CFI (not that that makes him know anymore than

we) was

looking at two certified Bonanza's that were partially dismantled and he

wanted to

buy them, make some modifications to them, and license them as

experemental with a

Soob engine.
We would like to do the same with the Cessna 337 (oscar duece, O2

charlie) and

hang a three rotor on the aft engine mount, and some dead weight in the

nose for

balance or something.
Royce

IMHO The FAA will let you do that for a limited amount of time.
Say one year and then you can apply for another year extension.
You must have a goal in mind. Such as getting an STC on the engine.
But then you will have to certify the engine. There are limatations
about where you can fly and who you can carry.

As I said I am not FAA lawyer so check with the FAA for from
the horses mouth.

Paul Lamar

I've just been through this with my Pitts. It may be different there (one
phone call would let you know) but I suspect that part is the same as here.
What Paul said is correct. You need a reason for doing it (like STCing the
engine). Here you need an engineer involved to work out the plan, testing
etc. It is a developmental section of the experimental category.

The catch is that if you don't get it approved the authority can refuse to
re-register the airframe as it has been through unknown loads etc. Of course
it also can't permanently be experimental unless you build 51% of the
aircraft.

There is a nice Aztec for sale at our local field that I could buy cheaply
without engines. Would love to put two 3 rotors in it....

Martin Morgan
Pitts S-1S

 
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