Cargo net tie down rings
Moderators: GAHorn, Karl Towle, Bruce Fenstermacher
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Cargo net tie down rings
There are some existing inserts in the floor of my '56 170-B that appear to be for cargo net tiedown rings that use a 10/32 thread. Does this type of tiedown ring actually exist, and if so, where can they be procured?
Thanks
MontanaBird
Thanks
MontanaBird
Re: Cargo net tie down rings
Does it look anything like whats on page 162, Fig. 103, Item 2, of the Illustrated Parts Catalog, PN 0511165, which can be purchased from Cessna?
'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.![Wink ;)](./images/smilies/icon_wink.gif)
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
![Wink ;)](./images/smilies/icon_wink.gif)
Re: Cargo net tie down rings
Item 3 in that illustration is a An366F-428 nutplate. It's 1/4-28 rather than 10-32 threads.
One could buy a couple of these and attach them with adel clamp shaped stainless sheet metal.
http://www.uscargocontrol.com/1wiredring-p-78.html Check out this thread for other ideas: http://www.cessna170.org/forums/viewtop ... ngs#p54941
One could buy a couple of these and attach them with adel clamp shaped stainless sheet metal.
http://www.uscargocontrol.com/1wiredring-p-78.html Check out this thread for other ideas: http://www.cessna170.org/forums/viewtop ... ngs#p54941
Last edited by n2582d on Thu Aug 27, 2009 1:04 am, edited 3 times in total.
Gary
- Bruce Fenstermacher
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Re: Cargo net tie down rings
You could use an AN42BA Eye bolt. This has 10/32 threads. A -4 is about 1/2 long a -6 is 3/4 long which includes the grip and thread length. Then get some 3/16 steel rod and cut and bend your own rings and insert them into the eye bolts and weld the ends closed.
Here is a sample of what I'm talking about. This one is probably 1/4-28 or maybe a bit bigger and came from the cargo area of a UH-1H. What you would make would be a little smaller but I think usable. Your limit is the 10/32 threads or you could get a bigger eye bolt and thick ring.
Here is a sample of what I'm talking about. This one is probably 1/4-28 or maybe a bit bigger and came from the cargo area of a UH-1H. What you would make would be a little smaller but I think usable. Your limit is the 10/32 threads or you could get a bigger eye bolt and thick ring.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Cargo net tie down rings
So, if one wanted to install tie-down rings, wouldn't they have to be at least as big (1/4-28) as the hardware shown in the IPB, and be of similar design?
Re: Cargo net tie down rings
You can and they are about $100 each.gahorn wrote:Does it look anything like whats on page 162, Fig. 103, Item 2, of the Illustrated Parts Catalog, PN 0511165, which can be purchased from Cessna?
Karl
'53 170B N3158B SN:25400
ASW-20BL
'53 170B N3158B SN:25400
ASW-20BL
Re: Cargo net tie down rings
Yep. (I didn't want to go on-record as recommending a simple shopping-trip to a hardware store.)lowNslow wrote:You can and they are about $100 each.gahorn wrote:Does it look anything like whats on page 162, Fig. 103, Item 2, of the Illustrated Parts Catalog, PN 0511165, which can be purchased from Cessna?
![Wink :wink:](./images/smilies/icon_wink.gif)
'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.![Wink ;)](./images/smilies/icon_wink.gif)
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention.
An originality nut (mostly) for the right reasons.
![Wink ;)](./images/smilies/icon_wink.gif)
- Bruce Fenstermacher
- Posts: 10327
- Joined: Tue Apr 23, 2002 11:24 am
Re: Cargo net tie down rings
Ron I think that would depend on how and what you were doing with your plane. Using the aircraft for pleasure and not for hire and as long as you didn't create a major alteration installing the sockets or rings, you are OK.ronjenx wrote:So, if one wanted to install tie-down rings, wouldn't they have to be at least as big (1/4-28) as the hardware shown in the IPB, and be of similar design?
After all, for pleasure you can fill your airplane with all the unrestrained stuff you can fit. What difference does it make if you restrained it but restraint was inadequate. Anything would be better than nothing and no restraint is OK
![Confused :?](./images/smilies/icon_confused.gif)
Kind of similar to the FAA's position on shoulder harnesses in aircraft like our 170s. Their basic logic is the aircraft are safe as they were certified without shoulder harnesses. So the addition of all most any shoulder restraint system using practically any material can only make it safer so long as one doesn't create a major alteration will doing it. Installing the shoulder harness in itself is not a major alteration as long as you don't change the airframe to do so.
I think the same logic could be used with tie down rings.
CAUTION - My forum posts may be worth what you paid for them!
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Bruce Fenstermacher, Past President, TIC170A
Email: brucefenster at gmail.com
Re: Cargo net tie down rings
I would agree with Bruce in that installing cargo rings, even if not FAA-approved, would be better than nothing.
Here's another alternative from your local Pick-N-Pull. There are four in the back of a Prius. One would have to grind off the little tab before installing them. I verified that the four nutplates in the baggage compartment floor of my '52 are 1/4X28 threads. The mounting holes in the Prius tiedown rings fit a 1/4" bolt (AN4) perfectly. It would be easy enough to do a static load test before installing them to verify their strength. The baggage compartment has a 120 lb. load limit. If the entire load was constrained by only one tiedown ring, that ring would only have to hold 1080 lbs. at 9 G's.
Here's another alternative from your local Pick-N-Pull. There are four in the back of a Prius. One would have to grind off the little tab before installing them. I verified that the four nutplates in the baggage compartment floor of my '52 are 1/4X28 threads. The mounting holes in the Prius tiedown rings fit a 1/4" bolt (AN4) perfectly. It would be easy enough to do a static load test before installing them to verify their strength. The baggage compartment has a 120 lb. load limit. If the entire load was constrained by only one tiedown ring, that ring would only have to hold 1080 lbs. at 9 G's.
Last edited by n2582d on Sun Aug 30, 2009 8:15 pm, edited 2 times in total.
Gary
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Re: Cargo net tie down rings
Aftermarket cargo rings can be found from various sources for Piper and Cessna seat tracks too. Most manufacturers are extremely proud of them, even the non-PMA ones. ![Confused :?](./images/smilies/icon_confused.gif)
![Confused :?](./images/smilies/icon_confused.gif)
Richard
N3477C
'55 B model (Franklin 6A-165-B3 powered, any others out there?)
N3477C
'55 B model (Franklin 6A-165-B3 powered, any others out there?)