Waco UKC-S (oz12684)

 

Waco UKC-S (oz12684) by Stan Fink from Model Builder 1995 - plan thumbnail

About this Plan

Waco UKC-S. Peanut scale rubber model

Quote: "Waco UKC-S, by Stan Fink. Something a bit more complicated than the typical Peanut, the UKC-S was one of Waco's classic cabin bipes from the 1930s and makes a great flying model. From a recognized Peanut Scale expert and authority on Waco aircraft.

My love affair with the Weaver Aircraft Company's biplanes began over 20 years ago, when I went to the local hobby shop and bought Model Builder magazine for November, 1973. The centerfold featured Walt Mooney's Peanut plan for the Waco SRE, one of the last planes produced by Waco. The accompanying photos of Walt's red model with black and white trim made the project irresistible! To my surprise, the model flew 'right off the board' with only a small amount of clay added to the nose. enjoyed flying the plane in schoolyards and contests, including the 1977 Nats in Riverside, California. After flying the plane for 13 years, I finally gave it away in 1986 when I moved from the West Coast to Philadelphia.

A few years ago, I started to wonder about other Wacos. in case you're not familiar with Waco model designations, the first letter denotes the engine make; the second, the wing; the third, the fuselage design. A fourth letter denotes 'S' for standard or 'C' for custom cabin. Our model, the UKC-S, was a four-place cabin model with a seven-cylinder Continental R-670 of 210 horsepower. It had a top speed of 142 mph and could fly for four hours without refueling. It was popular with business executives, but because of their expensive purchase price, they were limited to well-to-do individuals.

As a model, the 1934-35 UKC-S has more wing area, a shorter, fatter fuselage, and is a bit more difficult to build than Mooney's SRE. In my opinion, it has more Golden Age appeal too, since the SRE came out in the 1940s and exhibits modern streamlining notably absent from the UKC-S and other Golden Age airplanes.

FUSELAGE: I always build the fuselage first. This one is a basic box with formers top and bottom and one stringer running along each of the four surfaces. Build two sides over the hatched areas on the plan. The cowl will be built separately and attached later onto the triangle at the front of the fuselage. Wet the longerons after they are pinned down; this will prevent warps.

After the two sides are dry, separate them and glue in the crosspieces over the top of the plan. Cut out and glue the formers on the top and bottom, but do not put any stringer notches in them now The formers are drawn slightly oversize, so you will need to trial-fit and sand them slightly. The top stringer will not be installed until the wing is covered and put in place.

Since it will be difficult to make this plane under 10 grams, you need strong landing gear support. Bend .020-.025 mu-sic wire as shown on the plan and CA glue it to former D.

COWL: Making the cowl is not as hard as you might think. It's made separately from the rest of the airplane, so messing it up won't affect anything else - just make another one. First, cut out formers A and B from medium 1/16 sheet. Cut out the rectangular nose plug opening in former A and glue four 1/16 square sticks on the back side to reinforce the opening. Cut out former B but do not hollow it out or make any notches as shown on the plans - this will be done later. Make these formers as round as possible.

Now cut three 1/2-inch long, 3/32 square sticks and glue them on end to the back side of former B near the edges, equally spaced. Now glue former A on top of the three sticks, being careful to center it so the cowling doesn't come out skewed. After the structure is dry, wrap it with soft A grain sheet. Most modelers will prefer to use CA glue for this job.

After sanding the cowling, line it up with the fuselage over the plan and mark and drill two holes near the edges of former B for locating the points of the fuselage. Make sure the cowling lines up before gluing it..."

Direct submission to Outerzone.

Supplementary file notes

Article.

Corrections?

Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Waco UKC-S (oz12684) by Stan Fink from Model Builder 1995 - model pic

Datafile:
  • (oz12684)
    Waco UKC-S
    by Stan Fink
    from Model Builder
    October 1995 
    13in span
    Scale Rubber F/F Biplane Cabin Civil
    all formers complete :)
    got article :)
  • Submitted: 16/11/2020
    Filesize: 230KB
    Format: • PDFbitmap
    Credit*: MB2020

ScaleType:
  • Waco_Standard_Cabin_series | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz12684) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Waco_Standard_Cabin_series
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Waco UKC-S (oz12684) by Stan Fink from Model Builder 1995 - pic 003.jpg
003.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment

 

 
 

Download File(s):
 

Notes

* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.

Scaling

This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.

 

Terms of Use

© Outerzone, 2011-2020.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.