PA-11 Windshield on J-3 Boot Cowl

[Stinson Pilot]

Will the PA-11 windshield work with a J-3 Boot Cowl?

This is for my Wag PA-11 CWC project. It has a J3 boot cowl and no forward fuel tank.
I know the regular PA-11 and up cowls are wider.

I did numerous searches, lots of info on the difference in the windshields, but I couldn't find an answer for this question.

Just want to be sure before I order the windshield.

Thanks...

 

[WhiskeyMike]

I doubt it. The PA-11 slants at a lesser angle as I recall, and the width is definitely different. Why not use the J-3 windshield?

 

[Stinson Pilot]

I doubt it. The PA-11 slants at a lesser angle as I recall, and the width is definitely different. Why not use the J-3 windshield?

Slope is greater on the PA-11 windshield. Fairly cheap speed increase.

 

[tempdoug]

whoever your going to order a windshield from ask them about the differences?

 

[Waldo M]

No. Only a J-3 windshield will work with a J-3 boot cowl.

BTW, a PA-11 windshield is not wider than a J-3"s. A Continental powered J-3 and the PA-11 are built on the same Type Certificate [A-691]. There are differences between a J-3 and a PA-11 fuselage but width is not one of them.

 

[Stinson Pilot]

Shoot, I thought I had read that the only difference was the slope.
Thanks for the info.

 

[Waldo M]

The J-3 boot cowl has to accommodate a 12 gallon fuel tank and is several inches taller than that of a PA-11. The PA-11 windshield is raked back more than a J-3 windshield and provides less drag. The channel on the boot cowl for the bottom of the windshield is further forward than that of a J-3's. A J-3 bottom windshield channel is shaped differently because the boot cowls are different shapes.

 

[RaisedByWolves]

I have a j3 with a lot of supercub mods. It stil had the j3 firewall and pa-11 windshield. Looks like they trimmed it short. It wouldn’t fit on the 11 boot cowl, it was too short. The j3 boot cowl didn’t have a hole for the fuel tank and the -11 windshield came almost to the firewall.

 

[WhiskeyMike]

I have a j3 with a lot of supercub mods. It stil had the j3 firewall and pa-11 windshield. Looks like they trimmed it short. It wouldn’t fit on the 11 boot cowl, it was too short. The j3 boot cowl didn’t have a hole for the fuel tank and the -11 windshield came almost to the firewall.

Sounds good. A fair bit of trimming I assume. Most of the “open cowl” PA-18/180 banner planes used PA-18-95 boot cowls because the lower portion was a couple of inches narrower than the 150 boot cowl, and the windshield slanted like the PA-11. This reduced vibration in the tail exacerbated by the open cowls.

 

[Sarpy]

For whatever it’s worth I completed a Wag plans sport trainer a couple years back. I used a stock L-4 fuselage, a Wag Aero J-3 boot(without the gas tank hole) and a PA-11 windscreen. It fit fine. Never looked back. Bottom of the windscreen is only an inch or so aft of the top cowl.

Hope this helps.

Sarpy Sam

 

[Waldo M]

Stinson Pilot, If you follow Sarpy"s advice you will be disappointed in the results.

 

[Gary Raser]

I have a new never used J-3 windshield still in the box if you’re interested let me know
610-587-0123
Gary

 

[Stinson Pilot]

I have a new never used J-3 windshield still in the box if you’re interested let me know
610-587-0123
Gary

Thanks Gary.
I have the J-3 windshield that was on it, it's in good shape. I think I'm still going to install the PA-11 windshield.