• J3-Cub.com is the largest community of J3-Cub pilots, owners and enthusiasts. With over 1000 active members, we have fostered a vibrant community and extensive knowledge base. J3-Cub.com hosts a library of over 13 years of technical discussions, J3 data, tutorials, plane builds, guides, technical manuals and more. J3-Cub.com also hosts an extensive library of J3-Cub photos.

    Access to the J3-Cub.com community is by subscription only. Membership is only $49.99/year or $6.99/month to gain access to this community and extensive unmatched library of knowledge.

    Click Here to Become a Subscribing Member

    You will also get two J3-Cub decals as well!

Building an L-4 from plans.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.


Coming soon to a lake near me.
Jul 29, 2021
Reaction score
Three miles down Four Mile Lake

I am building an L-4 from Wag-Aero' Sport Trainer plans. It's pretty incomplete right now.
This is most of it. (I actually bought the instrument panel first because it's almost exactly perfect,then the guy I bought the panel from said, "I have plans and a few more parts somewhere." So I bought a (partially finished) empennage kit and two sets of plans from him.)

It has to be Cub Yellow. I learned to fly in a yellow L-4, with no electrical system, and a handpropped A-65.

I bought a set of float plans but haven't decided whether to build Wag's or Zenair's.

12 or 13 gallons should be sufficient, I'd basically be flying it within a 60 by 90 statute mile box, with a theoretical occasional maximum leg of 180 statute miles, and plenty of places to stop enroute to buy a sandwich and fuel.

I'm undecided on the cowling, open is iconic and what the plane I learned to fly in had. But Piper put a pressure cowling later models for a reason. Weather here varies year round mid 60s F to mid 80s F and the hottest months are also have 80-100% humidity. But the lake it will be based at is 10 foot AMSL. The highest I will "have" to fly is 1000 feet (over a 500 foot terrain feature). I won't be taking off or landing anywhere over 240 foot AMSL.

Some have also suggested clipped wingtips, which don't bother me too much from an aesthetic point of view. I get that it surrenders a tiny bit of lift to save a tiny bit of weight. I want to build it light. But I won't be doing any aerobatics in a floatplane.


Latest posts