Twin Astir I II or III?

[Wim de Vries]

Does anbody knows the difference between a Twin Astir I, II and III?
Greetings.

[Bert Willing]

Wim de Vries wrote:

> Does anbody knows the difference between a Twin Astir I, II and III?
> Greetings.

Twin I: Retractable gear (yet not all of them), L/D 38, water ballast
Twin II: Same wings, modified fuselage, fixed gear and subsequently
decreased L/D (35?)
Twin II: Same fuselage as II, modified wing, L/D 39, self-launching
available.

All three exist certified for aerobatics (while the III definitely is no
ab-initio trainer for aerobatics as the minimum speed in inverted flight
is way too high), and none of them is constructed anymore.

--
Bert Willing
-----------
Caproni Calif A21S D-6600
Come fly at La Motte du Caire in the French Alps:
http://www.decollage.org/la_motte/

[Peter Wafzig]

Hi all,

Bert Willing wrote:
>All three exist certified for aerobatics (while the III definitely is no
>ab-initio trainer for aerobatics as the minimum speed in inverted flight
>is way too high), and none of them is constructed anymore.

thats not right at all. For special customers (e.g. Italian airforce last
year), Grob Aerospace now and then produces about 20 planes. If you want
one, they will tell you the next production date and you can buy the 21st of
them (so we did). And as far as i can see, these planes are built very
carefully. Some of the older TWIN III acro have more faults as the newer
ones. Some details are better, too, e.g. panel, paint cover and so on.

Thats all, greetings,
Peter.

[Bert Willing]

Peter Wafzig wrote:

Nice to know. To my mind, the Twin III is quite a nice glider (whereas one can
have endless discussions about the I and II), and I thought it a pitty to stop
production.

[John H. Campbell]

>Nice to know. To my mind, the Twin III is quite a nice glider (whereas one

>can have endless discussions about the I and II.

Ditto. I fly a G103B (Twin II) & G103C (Twin III) in alternation and find
the later 18m 'swept-back-planform' ship pleasingly stable by
comparison. --JHC

[Jacopo Romei]

A comfortable comparison:

http://www.gliderreview.com/comparing-gliders/grob-g103-twin-astir/grob-g103-twin-ii

[JS]

On Wednesday, January 25, 2017 at 3:06:20 PM UTC-8, Jacopo Romei wrote:
> A comfortable comparison:
>
> http://www.gliderreview.com/comparing-gliders/grob-g103-twin-astir/grob-g103-twin-ii

In my experience the Twin 3 is by far the nicest to fly. Here's a link to a friend's OLC flights in one (yes, it's an M). Scroll through past years and you'll find several flights over 600km.
Jim
http://www.onlinecontest.org/olc-2.0/gliding/flightbook.html?st=olcp&rt=olc&pi=30967&sp=2017