https://www.barnstormers.com/ad_detail.php?id=1985195
Pending STC for gross weight increase to 2550#? anyone know anything about this plane or what this is about?
What's this about?
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
-
redacted
- Posts: 133
- Joined: Wed Jun 15, 2022 4:31 am
What's this about?
Nathaniel Perlman
1952 170B
N2282D S/N 20434
1952 170B
N2282D S/N 20434
-
GAHorn
- Posts: 21281
- Joined: Fri Apr 12, 2002 8:45 pm
Re: What's this about?
Mountain Airframe is likely our fellow-Member Dell Lehman. If there is a “pending STC” (whatever that means)…he might know.
(Pending might mean “applied-for”…with hope that it will be approved… Or ..it may mean “Applied for” without any hope for approval,..I.E. simply “applied for”…. Good Luck with that. Why? Because to approve an airplane for a higher GW will likely require the airplane to meet original certification as if it were a new-design, which may require “rejected landing climb requirements” and other expensive documentation of demonstrated capability ..as well as meeting structural strength requirements to carry that extra wt.
While I’d love for FAA to relax the rules… I suspect that if this were a simple matter…the many folks who have increased the H.P. of airframes who also would like to also increase legal operating weights but have been disappointed to discover the expense of getting that approval is extraordinary and given up… have discovered this is more complicated than what might first appear.
(Pending might mean “applied-for”…with hope that it will be approved… Or ..it may mean “Applied for” without any hope for approval,..I.E. simply “applied for”…. Good Luck with that. Why? Because to approve an airplane for a higher GW will likely require the airplane to meet original certification as if it were a new-design, which may require “rejected landing climb requirements” and other expensive documentation of demonstrated capability ..as well as meeting structural strength requirements to carry that extra wt.
While I’d love for FAA to relax the rules… I suspect that if this were a simple matter…the many folks who have increased the H.P. of airframes who also would like to also increase legal operating weights but have been disappointed to discover the expense of getting that approval is extraordinary and given up… have discovered this is more complicated than what might first appear.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
-
Richgj3
- Posts: 210
- Joined: Wed May 27, 2020 3:13 pm
Re: What's this about?
There is a gross weight increase STC for the PA12. It’s fairly simple IF the fuselage is uncovered. I don’t know how complex the approval was and I believe it was done quite a while ago. Also the addition of tip tanks on a PA24-250 Comanche STC increases the gross weight by 2 or three hundred pounds without any other structural changes
Having said all that, I get the feeling raising the 170 GW to 2550 will involve more than just a horsepower increase. But, I’m no expert on the issue by a long shot.
Rich
Having said all that, I get the feeling raising the 170 GW to 2550 will involve more than just a horsepower increase. But, I’m no expert on the issue by a long shot.
Rich
Rich Giannotti CFI-A. CFI-I SE.
-
GAHorn
- Posts: 21281
- Joined: Fri Apr 12, 2002 8:45 pm
Re: What's this about?
Tip Tanks have less effect on structural strength than one might suppose ( as opposed to fuselage tanks or wing-tanks mounted inboard) , so that might be misleading as to how difficult STC approval might be.
There have been many engine hp increases for 170’s but none of them have resulted in increased G.W. (so-far).
There have been many engine hp increases for 170’s but none of them have resulted in increased G.W. (so-far).
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
Cessna® is a registered trademark of Textron Aviation, Inc. The International Cessna® 170 Association is an independent owners/operators association dedicated to C170 aircraft and early O-300-powered C172s. We are not affiliated with Cessna® or Textron Aviation, Inc. in any way.