Ah, Todd, Todd. There you go using logic to demolish my arguments. How
unfair, how cruel!
A perusal of AC 21.17-2a reveals, although it starts out by observing:

Subject: TYPE CERTIFICATION--FIXEDWING

GLIDERS (SAILPLANES),

INCLUDING POWERED GLIDERS

Date: 2/10/93

Initiated By: ACE-100

AC No: 21.17-2A

Change:

1. PURPOSE. This advisory circular (AC) provides information and guidance
concerning acceptable

means, but not the only means, of showing compliance with § 21.17(b) of part
21 of the Federal Aviation

Regulations (FAR) for type certification of gliders and powered gliders.
Accordingly, this material is

neither mandatory nor regulatory in nature and does not constitute a
regulation. General guidance

relative to glider type certification is also provided.



It also includes the following:



b. Additional Criteria for Powered Gliders.

(1) Powered fixed-wing gliders may be type certificated under Section
21.17(b) if:

(i) The number of occupants does not exceed two;

(ii) Maximum weight does not exceed 850 kg (1874 pounds); and

(iii) The maximum weight to wing span squared (w/b2) does not exceed 3.0
kg/m2 (0.62

lb./ft.2).

NOTE: These criteria originated from JAR-22.

h. Section 91.205 of the FAR. Powered gliders are considered to be powered
aircraft for the

purpose of complying with § 91.205.





Oh how crushed am I as I search for Crow to eat. Oh how unkind this cruel
world.
A couple of caveats to recover as much of my ego as possible:
14 CFR 91.205 applies only to aircraft with "Standard" airworthiness
certificates

and

When you turn your motor glider off in flight do you then become subject to
a different set of rules?
The answer is no, you do not.

Agreed. You are subject to rules that apply to "aircraft"
and to those that apply to "powered aircraft," but not any
that apply only to "airplanes."


Actually, it turns out that you do. If you turn off your engine, in my MG
you lose everything electrical except a radio.
You are now a pure glider and fly by glider rules. Incidentally there is no
differentiation between glider and motor glider in the right of way rules.
(14 CFR 91.113)

So, you were (mostly) correct and I stand corrected. I apologize to you and
to Judy for being strident as well as incorrect.
But think of this, with out Lenny or Al, who is left but me to take shots
at?

Allan



"Todd Pattist" wrote in message
...

"ADP" wrote:

Yes, a glider is an aircraft by definition but a motor glider is not a
powered aircraft, by definition.

So cite the definition you think applies.