Quarter Turn Fasteners - Page 3

pmccoy · #21 12-01-2009, 10:10 AM

... on the fasteners. I have gone back and forth on this decision and hearing from others is really helping.

I am not building a speed machine, so having the ultra clean lines of the hinges is not a priority. In my opinion, both solution look like an airplane, so to me the visual isn't a factor.

My original goal was for ease of use down the road. I had heard stories of the hinges either cracking or being difficult to install on the firewall. So I think my choice will be to use the Mil Spec fasteners on the firewall, and go with the hinges on the horizontal lines. Again, thanks to all for the comments.

Crossbow · #22 12-02-2009, 06:28 AM

Quote:

Originally Posted by pmccoy

... on the fasteners. I have gone back and forth on this decision and hearing from others is really helping.

I am not building a speed machine, so having the ultra clean lines of the hinges is not a priority. In my opinion, both solution look like an airplane, so to me the visual isn't a factor.

My original goal was for ease of use down the road. I had heard stories of the hinges either cracking or being difficult to install on the firewall. So I think my choice will be to use the Mil Spec fasteners on the firewall, and go with the hinges on the horizontal lines. Again, thanks to all for the comments.

If you do not mind getting one more piece of advice ...

While I am still a good way from the point you are at, I have already decided to use the Quarter Turn Fasteners because I plan to use a three-bladed prop on my RV. Therefore, I expect that these fasteners will make it a bit easier to get the cowling off and on a plane with a three-blade prop.

Thanks much!

JonJay · #23 12-02-2009, 08:36 AM

Quote:

Originally Posted by Crossbow

If you do not mind getting one more piece of advice ...

While I am still a good way from the point you are at, I have already decided to use the Quarter Turn Fasteners because I plan to use a three-bladed prop on my RV. Therefore, I expect that these fasteners will make it a bit easier to get the cowling off and on a plane with a three-blade prop.

Thanks much!

I would think it would make it more difficult? Once the hinge pin is pulled, the mating surfaces slide away or pull apart. With 1/4 turns the "screw" has to clear the socket. Others have commented that this makes it tough to disconnect the sides? It may not matter either way.
There are some very good ideas in other threads about dealing with 3 blade props as far as cowling modifications. A lot also depends on whether you are horizontal or vertical induction.

Rick S. · #24 12-02-2009, 08:54 AM

Quote:

Originally Posted by Vladyspassky

I think it's appropriate place to ask if somebody wants to sell/rent installation tools. Particularly I am interested in Camlock pliers and tapered shank tool for retainers. Just asking before ordering from the manufacturer. Thanks for looking,

I have both tools, the pliers are a must have from what I've seen. They work great. I initally used the retainers until I painted the cowl and removed the fasteners. I never used the retainers after paint. The cowl is VERY easy to R&R without the fasteners hanging up on the recepticles. Slip the cowl on, pop in the 1/4 turns and engage. If you want to borrow the tools no problem but postage in the long run may rival the purchase costs.

JonJay · #25 12-02-2009, 09:17 AM

Quote:

Originally Posted by Rick S.

I initally used the retainers until I painted the cowl and removed the fasteners. I never used the retainers after paint. The cowl is VERY easy to R&R without the fasteners hanging up on the recepticles. Slip the cowl on, pop in the 1/4 turns and engage.

The keepers are what cause me the most grief. Unfortunatley, due to the inconsistency in my Bucker cowl, the fasteners are a bunch of different lengths. Getting them back in the right spot when they fall out is a real challenge. I see how this would not be an issue for the RV Cowl.

pmccoy · #26 12-02-2009, 09:58 AM

Quote:

While I am still a good way from the point you are at, I have already decided to use the Quarter Turn Fasteners because I plan to use a three-bladed prop on my RV. Therefore, I expect that these fasteners will make it a bit easier to get the cowling off and on a plane with a three-blade prop.

Ok, this is a new one to me. I have a Catto 3-Blade prop and a Vertical induction system. Am I going to have issues pulling the cowl? Is this a combination that requires mods to the cowl? Is this effecting my decision on the Quarter Turn Fasteners...

I will start searching for old threads, as I have not noticed this issue before.

Thanks.

Rick S. · #27 12-02-2009, 10:26 AM

On the Rv-10 the cowl needs to have the nose gear opening extended forward to allow the cowl to be lowered enough to clear the two blades of the prop that are below the thrust line. That is the only thing I had to modify. IMHO the 1/4 turn fasteners WITHOUT the retainers make for easier cowl removal and installation. As far as a three blade requiring any additional mods I can't see where there would be any for that...now vertical induction has the FAB to snorkel clearance/seal to deal with but horizontal induction with the air duct to the front left intake should not be an issue regardless of hinges or 1/4 turn fasteners.

Rick S. · #28 12-02-2009, 10:30 AM

Quote:

Originally Posted by JonJay

the fasteners are a bunch of different lengths. Getting them back in the right spot when they fall out is a real challenge. I see how this would not be an issue for the RV Cowl.

I'm not familiar with different length fasteners, the Milspecs recepticle is adjusted for depth and the 1/4 turn fastener is standard length, I don't worry about which one goes back where.

JonJay · #29 12-02-2009, 11:01 AM

Quote:

Originally Posted by Rick S.

I'm not familiar with different length fasteners, the Milspecs recepticle is adjusted for depth and the 1/4 turn fastener is standard length, I don't worry about which one goes back where.

Good information Rick.
The standard 1/4 turn hardware I am familiar with have the sockets fixed. Sounds like I have stupid hardware! This is good information if/when I ever restore the Bucker, I would change to the adjustable sockets, and loose the keepers. I think I would be much happier with the system.
I guess all 1/4 turn stuff is not created equal!

Crossbow · #30 12-03-2009, 06:18 AM

Quote:

Originally Posted by pmccoy

Ok, this is a new one to me. I have a Catto 3-Blade prop and a Vertical induction system. Am I going to have issues pulling the cowl? Is this a combination that requires mods to the cowl? Is this effecting my decision on the Quarter Turn Fasteners...

I will start searching for old threads, as I have not noticed this issue before.

Thanks.

Pete:

I will see if I can dig up the exact statement that I am referring to later today.

But to paraphrase it in the meantime, he said that while one could use the hinge pin method with a three blade prop, however he found it easier to use the quarter-turn fasteners instead. And since I am working on first RV, I expect that I will be doing a bit more than the usual cowl and de-cowling work so I like the idea of the quarter-turn fasteners.