Aeronca Sedan (oz4461)


Aeronca Sedan - plan thumbnail image

About this Plan

Mercury Aeronca Sedan. Scale model for free flight. Wingspan 66in, wing area 549 sq in. Weight 3 lbs. Scale is 1-3/4in=1ft. For 1.49 to 2.5cc engines.

Quote: "Vintage scale by Dave Deadman. Scale Nostalgia. Dave Deadman builds a 1952 free flight scale Aeronca Sedan. Part 1.

During the early 1950s Mercury Models, under the direction of Henry J Nicholls, produced three splendid scale aircraft, all designed by Ron Young. In 1950 came the Monocoupe at 64 inch span for 1.5 to 2.5 cc, then a smaller 40 inch Monocoupe for 0.5 to .75 cc. For 1952, the Aeronca Sedan at 65 in span appeared in the model shops. I have no idea how many Aeroncas Mercury produced, but it was very popular. I do remember how well it flew, and the deep impression it made on me at the tender age of 14 years.

There was a young man I used to fly with in the Watford area named Roy Wall. Not only did Roy build really well, but his finishes (all brushed cellulose) were superb. There's a photo of Roy in a Keil Kraft Handbook holding his Southerner 60, about that time. Later, he sold me his Southerner and I put my ETA 29 in it. Talk about a climb! But I digress..

Roy Wall built an Aeronca with (I think) an ED 2.46, like the original. With his beautiful paintwork and accurate build, it flew sedately in large circles, looking very 'real' in the air. My only successful models at that time were 'sports' types. Scale seemed out-of-reach, for experts - or at least for blokes with a job and more pocket money. Also, my building was appalling. There was always more glue and dope on me, rather than on the model.

These days, I use R/C to keep my vintage sport models flying on the small fields available to me. This relaxed 'guided free-flight' suits me very well and gives me great pleasure. It would be great to have just one scale R/C model that could fly in the same relaxed way. It came as a surprise to find that the plan for the Aeronca Sedan is still available 50 years later.

Is it proper scale? The outline looks fine and, according to the notes, it has scale areas and tail moment, plus scale dihedral and wing section. If you were fussy, you might criticise the nose shape or worry about the sectional shape of the dashboard, which doesn't tally with the Sedan's sales brochure.

The aerodynamic balances on the rudder and elevator are missing, but you could build them in. Probably it wouldn't pass muster in a modern scale top level comp, but for what I want that doesn't matter.

What engine? The engine bay is huge, but you only need a modest 2.5 to 3.5 cc.for even an R/C version. However, you do need a rear induction. You could use a front induction engine, but you would need a shaft exten-sion to suit the cowl and nose. A small four-stroke would be nice, or perhaps an
Indian Mills 2.4 with R/C throttle.

Only two motors in my small collection seemed suitable - a CS repro ED 3.46 Hunter, and Ian Russell's Lynx. The Hunter (great engine) was doing sterling work in a Super Scorpion (oz2018) so the Lynx was gently run-in and the throttle tested. The throttle response is not as good as a glow motor, but it should be adequate.

The original had an ED 2.46 mounted sidewinder so the cylinder was flush with the side of the cowling. Personally, I hate to see a hole in the side of a scale cowl, so the Lynx was fitted inverted with the bearers below the lugs so it drops in from above. That way the engine is almost entirely hidden.

Room for R/C? You must be joking! There's enough room for a party in there. If you wanted to do a detailed interior, you could use small servos and hide them under four scale seats with pilots and passengers..."

Direct submission to Outerzone.

Update 24/07/2017: added article, thanks to Pit. This is a later 'Scale Nostalgia' article from Flying Scale Models.

Supplementary file notes

Printwood formers, 19 sheets.


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Aeronca Sedan - completed model photo



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User comments

Photo of the completed Sedan model was found online at which also hosts for download a full 2 part 2005 FSM article by Dave Deadman that covers in detail doing a modern RC conversion of this kit.
SteveWMD - 27/05/2013
A few more photos from the archives [more pics 006, 007]. Mercury Aeronca Sedan: I converted the free flight kit to RC.
AndyCoutts - 09/03/2017
Attached box kit image [more pics 008].
Pit - 24/07/2017
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