The Cessna 120-140 Association Forum

"Last" of the projects for our new 140. Along with intercom and Garmin GDL82 ASD-B upgrades, we (meaning I) have found a Scott 3200 tailwheel assembly from one of the members.
Anyone willing to share the 337 or information on finding the correct STC for the installation. There is a page in the Reference Manual, but additional information would be greatly appreciated. Such as the arm of the tailwheel assembly, spring tension (yes or no) or anything else that you can think of. Easiest way to get the information to me is at remhof@q.com. Thank you all.
Cheers,
Marc Remhof

Its on the TCDS

*(d) Scott 3200, steerable, swiveling 8 lbs. (+201)
(Installed in accordance with Scott Bulletin No. I-168)

Mark wrote: "...GDL82 ASD-B upgrades..."

Hey, Mark, where did you mount the GDL82? Any issues that you ran into with the project that might help a couple of us who are poised to begin this installation? Thanks for any experience you can share! Mac

The GDL-82 was mounted just aft to the battery box, with the antenna mounted on top of the fuselage just aft of the baggage compartment. The mechanic the did the installation made a small mounting shelf that he riveted to the lower belly skin. It's ADS out only and the installation is very clean. The only issue we had was the transponder not passing the operation inspection.
As far as I can tell, I'd recommend the GDL-82 system for the basic compliance.
On a side note, I was able to purchase a 3200 tailwheel assemble from a fellow member. Now the doors are off as we work to change out the window latch mechanisms (wow are they costly).
My advise concerning the window mechanism, just bite the bullet and buy new. It will save you a lot of headaches.
Marc

Marc wrote: "The GDL-82 was mounted just aft to the battery box"
Thanks, Marc -- that seems an excellent spot -- very similar to what Bill Rhoades is doing with his 120 installation (Following Bill's lead is always an excellent idea! ). Mine ended up being near that location -- we "discovered" an old ELT mount already in place passenger side/adjacent to the battery & it worked well with little modification/reinforcement & adding a mounting plate (...trial fit in photo -- shoe is not part of installation ). Since I needed a new transponder anyhow (...KT76 had served me well since 1987! ), I opted for the GTX327 and the Garmin combo cert/flight tested 100% & has worked flawlessly. Running/routing wires, especially the stiffer 400 coax was a bit of a challenge, but overall an easy installation...great to have it done in any event. Mac

Looks like a nice, clean installation. I am trying to stay away from all the modern flight navigation systems and that is why I opted for the basic installation. I am very pleased with how it all turned out.

We had nothing but tail wheel shimmy on a brand new 3200 scott so we put the 2000 back on and have never had it happen. Is the 3200 too much wheel for the little 120 140'S ?

6898 wrote: ↑Mon Jul 16, 2018 7:40 am We had nothing but tail wheel shimmy on a brand new 3200 scott so we put the 2000 back on and have never had it happen. Is the 3200 too much wheel for the little 120 140'S ?

There's a lot of our types flying with the 3200 and few seem to have the shimmy problem. That said, proper set-up (...correct steering springs, correct leaf spring angle, correct pressure, etc. and etc.) has been a major ongoing "conversation" for as long as I can remember, so it can be an issue. The small Scott seems less likely to shimmy, 'though it certainly can/will if not "set up" properly -- on some 2000 installations stronger springs than those that come with the "Scott spring/chain kit" may be needed or the springs may need more tension (stretch) than Scott's guidelines specify and, of course, the "king pin" angle has to be correct. Different strokes for different folks -- some work flawlessly and some can be a bit of a puzzle to solve. One thing for absolute certain & I know you agree -- any shimmy on a 120/140 can very quickly screw up a tailwheel bracket, becoming very expensive. Mac

The 3200 uses much heavier springs. The recommendation is for no tension; just tight enough to take up the slack in the chains. The angle of the kingpin (steering axis) is critical. If it is tilted forward very much at the top it will shimmy, and it's heavy enough it will really get your attention. There's a good article on this in the Neal Wright section, IIRC.

(Later that same evening. Found them:)
viewtopic.php?f=10&t=147
viewtopic.php?f=10&t=134

If the Scott 3200 tailwheel is installed in accordance with Scott Bulletin I-168, does the IA have to submit the 337 for field approval?