IS-29

On May 17, 1:05*pm, Tony wrote:
On May 17, 12:47*pm, "kirk.stant" wrote:

On May 17, 11:53*am, Jim wrote:

I have a friend looking at rebuilding an IS-29 lark.

Are parts available? Does it have a life limit like the 28?

Thanks,
Jim

Not sure if parts are available (though Blanik parts may fit in some
cases) but it definitely has a life limit, and a factory approved
inspection method for life extension.

Kirk

really? i found a pdf of the flight and maintenance manual online as
well as the faa type certificate and didn't see anything about a life
limit. *there are no AD's against the IS-29 that I can find in the FAA
database.

My mistake, I was thinking IS- 28. Good luck, the 29 looks like an
interesting ship.

Kirk
66

On 5/17/2011 7:28 PM, Jim wrote:
really? i found a pdf of the flight and maintenance manual online as
well as the faa type certificate and didn't see anything about a life
limit. there are no AD's against the IS-29 that I can find in the FAA
database.

Thanks for the comments, do you have a link to the online manuals?

I owned an IS-28 years ago when the life limit issue became a big deal
but don’t remember anything being said about the 29.

Has anybody that’s flown one want to comment on flying qualities?

Thanks,
Jim

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).

As with all 'flying qualities related' input, it's up to the savvy reader to
put it into some sensible context. Example: 'Over the years' I'd heard/read
about IS-28's being 'abrupt stallers' and 'eager spinners.' When I eventually
got some time in one, I didn't find either ship-trait to be abbie-normal or
alarming or worrisome. This particular one communicated (in the usual
manners), long before serious wing flow separation occurred, that Joe Pilot
was asking it to fly near the slower end/higher AOA portion of its flight
envelope. But then I've found the 2-32's I've asked to do the same to be good
communicators, beforehand, too. Never spun an IS-28, though both 2-32's I'd
experience with *required* properly-sequenced, positive, anti-spin control
inputs in order to break their spins...definitely not the case (say) for any
1-26s I spun.

Regards,
Bob W.

On May 18, 11:32*am, BobW wrote:

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).


Regards,
Bob W.

Not all IS-29s have the all flying tail. The IS-29d2 version has a
conventional stabilizer/elevator setup. The access to inspect wing
connections (similar style to the Foka 4, by the way, complete with
the adjustable width drag fitting connection at the front, at least on
the IS-29) is much improved on the d2 version with the large,
removable over-wing fairing. On the 29d2, they fittings were out in
the open and easy to see. On the 29, the spars slip into boxes and
your only view is straight down into the hole.

There have been both variants at Sunflower, and I have flown neither.
So, I can't give a first hand account of either. Other than to say
that the pilots of both have landed with smiles.

Steve Leonard

On May 18, 11:32*am, BobW wrote:
On 5/17/2011 7:28 PM, Jim wrote:

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).

Except, of course, that neither the IS-28 or IS-29 has an all-flying
tail...

(see other RAS thread about changing light bulbs, etc.)

Kirk
66

On 5/18/2011 11:13 AM, kirk.stant wrote:
On May 18, 11:32 am, wrote:
On 5/17/2011 7:28 PM, Jim wrote:

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).

Except, of course, that neither the IS-28 or IS-29 has an all-flying
tail...

(see other RAS thread about changing light bulbs, etc.)

Kirk
66

http://groups.google.com/group/rec.a...q=%22IS+29%22#

http://groups.google.com/group/rec.a...&q=%22Zuni%22#
(See Richard Friday's comment...)

Regards,
Bob W.

On May 18, 2:01*pm, BobW wrote:
On 5/18/2011 11:13 AM, kirk.stant wrote:

On May 18, 11:32 am, *wrote:
On 5/17/2011 7:28 PM, Jim wrote:

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).

Except, of course, that neither the IS-28 or IS-29 has an all-flying
tail...

(see other RAS thread about changing light bulbs, etc.)

Kirk
66

http://groups.google.com/group/rec.a...wse_thread/thr...

http://groups.google.com/group/rec.a...wse_thread/thr...
(See Richard Friday's comment...)

Regards,
Bob W.

Interesting threads, those - thanks.

I had forgotten (if I had even known) that there was an IS-29D with an
all-flying tail. This discussion was initially about the IS-29B,
which does not.

Cheers,

Kirk

On May 18, 4:10*pm, "kirk.stant" wrote:
On May 18, 2:01*pm, BobW wrote:





On 5/18/2011 11:13 AM, kirk.stant wrote:

On May 18, 11:32 am, *wrote:
On 5/17/2011 7:28 PM, Jim wrote:

If you haven't already searched for such, I seem to remember at least one RAS
thread involving some 1st-hand feedback about IS-29 flying traits,
specifically a quirk involving the all-flying tail (which my Zuni also exhibited).

Except, of course, that neither the IS-28 or IS-29 has an all-flying
tail...

(see other RAS thread about changing light bulbs, etc.)

Kirk
66

http://groups.google.com/group/rec.a...wse_thread/thr...

http://groups.google.com/group/rec.a...wse_thread/thr...
(See Richard Friday's comment...)

Regards,
Bob W.

Interesting threads, those - thanks.

I had forgotten (if I had even known) that there was an IS-29D with an
all-flying tail. *This discussion was initially about the IS-29B,
which does not.

Cheers,

Kirk- Hide quoted text -

- Show quoted text -

And again, my reading comprehension is not doing too well today! At
least, the link to the IS-29 manual was for a B model with the
conventional tail.

Kirk

This bulletin comes up when an A.D. search is done for Canada. It
seems to reference a manufacturer's mandatory service bulletin:

S-29D2-EO-06

16.02.1985

MANDATORY SERVICE BULLETIN

IS-29D2/EO-06

APPROVED BY : DEPARTMENT OF CIVIL AVIATION with no. 2639/06.03.1985



PRODUCT : IS-29D2 glider



OBJECT : Safe life and service life increase



COMPLIANCE : Endurance studies of the manufacturing plant and
servicing experience.



1. PLANNING INFORMATION

A. Applicability

This bulletin is applied to all the IS-29D2 gliders.



B. Reason

Increase of gliders safe life.



C. Description

The bulletin modifies the total safe and service life of the glider,
as follows:

- total safe life : 3750 flight hours (15,000 landings)

- total service Iife : 20 years

- safe life until the first general revision and between general
revisions : 750 flight hours (3000 landings)

- service life until the first gen.rev. and between general revisions:
6 years.

Link to bulletin: http://wwwapps3.tc.gc.ca/Saf-Sec-Sur...-29D2-EO-6.htm

Despite what it says about calendar life I noticed that the IS-29D2's
in Canada are more than 20 years old.

So I know this is an old thread, but I'm looking for some info for fatique testing on mine.

If anyone has some info that would help (I'm having some Non-destructive testing done, but there are no procedures published for it) it would be appreciated.

Also, if you have some questions about flying it, feel free.

Cheers