Longster Wimpy (oz3332)
About this Plan
Longster Wimpy. Free flight scale model for engines up to .049 power. Subject is the home-built light plane designed by Les Long.
Quote: "Here is Walt Mooney's Longster Wimpy from Model Airplane News issue 09-54. Walt's free flight design looks like a great electric RC conversion candidate."
Direct submission to Outerzone.
Quote: "WIMPY, by WALT MOONEY. Les Long's famous Wimpy home-built light plane makes a corking subject for flying scale. Wing span is 37 inches, engines up to .049's.
Wanted! A scale model that has pleasing lines, is easily built, and will fly well free flight.
With these requirements in mind, Les Longs Longster Wimpy was selected. The consistent surface shapes and smooth curves, coupled with a slab-sided fuselage and low wing, fulfilled the first two requirements. The long tail moment and ample tail size indicated a model which would fly with but one modification. Dihedral was increased, this being the only deviation from exact scale.
For the detail hounds, the external cylinders and open cockpit provide that final touch. Without the cylinders and cockpit detail the model still makes an excellent sport type low-wing free flight.
Les Long, a home builder of note, produced at least four designs between 1928 and 1934, of which Wimpy is one of the prettiest. Powered with an Aeronca 26 horsepower engine it had good performance, due to clean lines. Wimpy is a rather simple scale job from the construction stand point and requires only a few remarks to clarify some fine points.
The fuselage is the conventional longeron, former, and stringer combination. Use very hard balsa for the longerons. One-eighth inch sheet fills between the longemns sides and bottom iorsard of the wing trailing edge. Wings are of conventional construction. Wing attachment is discussed later.
The horizontal and vertical tails are constructed flat, then 1/8 x 1/16 in cap strips are added. Sand to a streamlined shape and a warp resistant tail results.
The landing gear is critical; it must be strong since it takes most of the hard knocks. Use a strong cement, Ambroid or equivalent, to cement the main wire into the fuselage. Install the wires shown in the front view and sketch. The lower aft wire goes through a hole in the fairing and is bent in a 3/32 in diameter loop for a flying wire connection. Solder all wire joints. Wrap the main wire and fairing with silk or nylon to complete the job.
The wing attachment utilizes rubber tension on the flying wires to hold the wing and provide quick disconnects in case of collision. Four 'S' hooks are required from .028 wire. Two hook into the loop at the bottom of the fairing to hold the lower flying wires, and two to connect the upper flying wires to the rubber band which runs through the tube in the fuselage half way up former #4. The wing tongues locate the wing on the fuselage with the correct incidence.
To keep the test flights tame use a 7 x 2 prop. It was found that a slight amount of up-thrust was required because of the high thrust line. The correct amount is indicated on the plans. Make sure there are no warps in wings or tail. If there is tail grass available test glides are in order. Otherwise, find a smooth take-off area and try low power, prop on back-ward, taxi tests increasing power until you get a take-off. Keep the turns shallow and to the left."
Supplementary file notes
Planfile includes article.
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
Long_Low-Wing_Longster | help
see Wikipedia | search Outerzone
ScaleType: This (oz3332) 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.
ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Long_Low-Wing_Longster
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.
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* 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.
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.
© 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.