ASW 20, ASW 20B, ASW 20C DIFFERENCES

[Ventus B]

The only place I have found to research the differences between the
above ASW20 glider models is on the Sailplane Directory website. From
what I can tell the B model differs from the "A" by a slightly heavier
airframe, boundary layer control blowholes on the wing, a higher auw,
and different airfoil. And as far as I can tell the C model seems to
have the same airframe as the "A" except for a slightly modified
cockpit, whatever that means, and the same boundary layer control and
airfoil as the B. I also believe the B and C models have different
(less) positive flap settings than the "A". All are certified in the
experimental category.
Can anyone corroborate/elaborate? Also, where can I find
airworthiness directives/technical notes on the ASW20? They are not
available on the FAA website for this model glider.

[Bert Willing]

B and C model have a modified airfoil (w/ boundary layer control, but it
doesn't actually make a noticable difference in performance), a modified
flap setting for landing ("chicken" setting at 38 deg insead of 55 deg for
the A model) and a different mixer for ailerons/flaps. The B model has a
reinforced spar to be able to carry water in the BL version.
B/C models have the canopy connected to a lifting instrument panel, a
modified canopy jettisson mechanism (huge improvement) and automatic
elevator hook-up. They come with a sprung wheel and hydraulic brake. The
cockpit has some more fairings and a slightly different seating position.

That's about it. The important differences are in the safety aspects of the
fuselage... All models exist also as a "L" version with 16.6m span of which
only the BL may carry water in the 16.6m version.

--
Bert Willing

ASW20 "TW"


"Ventus B" > a écrit dans le message de
m...
> The only place I have found to research the differences between the
> above ASW20 glider models is on the Sailplane Directory website. From
> what I can tell the B model differs from the "A" by a slightly heavier
> airframe, boundary layer control blowholes on the wing, a higher auw,
> and different airfoil. And as far as I can tell the C model seems to
> have the same airframe as the "A" except for a slightly modified
> cockpit, whatever that means, and the same boundary layer control and
> airfoil as the B. I also believe the B and C models have different
> (less) positive flap settings than the "A". All are certified in the
> experimental category.
> Can anyone corroborate/elaborate? Also, where can I find
> airworthiness directives/technical notes on the ASW20? They are not
> available on the FAA website for this model glider.

[Basil Fairston]

The B and the C are the same except that the B has a slightly heavier wing =
to allow water ballast to be carried with the 16.6m tips on. The B and C =
differ from the A as follows.

Different aerofoil with blow holes.
Self connecting elevator
Instrument panel raises with the canopy
Revised undercarrage with suspension and a disk brake.
Max flap deplection is about equivalent to 1/2 landing flap in the A model.

For ADs try the Schleicher site or the US representative.

Ventus B wrote:

> The only place I have found to research the differences between the
> above ASW20 glider models is on the Sailplane Directory website. From
> what I can tell the B model differs from the "A" by a slightly heavier
> airframe, boundary layer control blowholes on the wing, a higher auw,
> and different airfoil. And as far as I can tell the C model seems to
> have the same airframe as the "A" except for a slightly modified
> cockpit, whatever that means, and the same boundary layer control and
> airfoil as the B. I also believe the B and C models have different
> (less) positive flap settings than the "A". All are certified in the
> experimental category.
> Can anyone corroborate/elaborate? Also, where can I find
> airworthiness directives/technical notes on the ASW20? They are not
> available on the FAA website for this model glider.

[Marc Ramsey]

Bert Willing wrote:
> That's about it. The important differences are in the safety aspects of the
> fuselage... All models exist also as a "L" version with 16.6m span of which
> only the BL may carry water in the 16.6m version.

The B/BL (are there any non-L B models?) have a higher max gross weight
in 15M, mine was 1150 lbs. The 20 and 20C models are 950 lbs, I
believe. The B and C were produced concurrently, and there were
improvements made in the cockpit over time, the last B/C cockpits are
set up pretty much like an early ASW-24.

Having been personally acquainted over the years with two usually
careful pilots who made their last flights in Schleicher gliders with
the elevator disconnected, I'd definitely opt for a B or C...

Marc

[Eric Greenwell]

Basil Fairston wrote:
> The B and the C are the same except that the B has a slightly heavier
> wing to allow water ballast to be carried with the 16.6m tips on.
> The B and C differ from the A as follows.

I think it was more substantial than "slightly": at least 20-30 pounds
is what I remember. The B model had more ballast allowed in the 15 meter
configuration, the wings were noticeably stiffer, but it was the favored
model for ridge running at high speeds.


--
Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA

[Eric Greenwell]

Marc Ramsey wrote:

>
> Having been personally acquainted over the years with two usually
> careful pilots who made their last flights in Schleicher gliders with
> the elevator disconnected, I'd definitely opt for a B or C...

I know 6 ASW 20 pilots that survived launches with the elevator
disconnected (though the glider often did not), so "I approve Marc's
message". I had a C model for 11 years. I would never have a glider
without automatic elevator hookup, because I am very much aware of my
limitations.

Unless money is a compelling problem, I would not ever suggest an ASW 20
other than the B/C models.

--
Change "netto" to "net" to email me directly

Eric Greenwell
Washington State
USA

[Chris OCallaghan]

10 years of discussions of ASW 20s available. Differences,
characteristics, recommendations. Search Google Groups. Use

"ASW 20 Models"

[Tom Serkowski]

Eric Greenwell > wrote in message >...
> I think it was more substantial than "slightly": at least 20-30 pounds
> is what I remember. The B model had more ballast allowed in the 15 meter
> configuration, the wings were noticeably stiffer, but it was the favored
> model for ridge running at high speeds.

The wings on my '20B weighed a bit over 170 lb each. This is about
the same as each of the 18m wings of my ASH-26E! A one-man rig is an
excellent investment for both.

I loved the '20B and at a max AUW of 525kg (1157 lb) it ran great. I
installed custom dump valves and all the water would be gone in 90
seconds. I could start dumping on downwind leg and be almost empty at
touchdown.

The '26E flies just as nicely, though the roll rate is a bit slower.
And with the extra 200 lbs, the landing is a bit more challenging.
When it comes to landing in a small, rough field, very few other
silplanes give as much confidence as the ASW-20 B/C with the flaps,
spoilers, and 5.00x5.00 wheel with disc brake and shock absorber.

Tom Serkowski
ASH-26E and formerly ASW-20B (5Z)

[Denis]

Chris OCallaghan a écrit :
> 10 years of discussions of ASW 20s available. Differences,
> characteristics, recommendations. Search Google Groups. Use
>
> "ASW 20 Models"

or http://minilien.com/?ExuHxiRZim

--
Denis

R. Parce que ça rompt le cours normal de la conversation !!!
Q. Pourquoi ne faut-il pas répondre au-dessus de la question ?