About this Plan
555. Free flight power model.
Quote: "For less than six bucks you can build this 1/2A-powered Free-flight model that's rugged, dependable and fast. The 555, by Harold Stevenson.
Old veteran free-fighters, please take a back seat! The '555' is strictly for newcomers. Of course, if the old-timers want to tag along and build a ship that is inexpensive, flys like mad and is just plain fun, they are welcome too.
The 555 derives its name from its cost. This model cost exactly $5.55 to build and fly! This includes everything - fuel, prop, cement, dope, engine, etc. The model was designed with this low cost in mind. True, a smaller and less expensive model could be built, but it was decided not to sacrifice performance just to cut cost to a bare minimum.
The ship looks and acts like a regular contest-type free-flight and so makes an excellent trainer for the youngster without denting his allowance too badly. All the tricks of adjustment may be experimented with on this model, giving the tyro a good basic working knowledge of the flight characteristics of free-flying models. When he graduates into the larger high performance ships this knowledge will be invaluable.
A few years back, a ship like this would have been impossible at this low cost, but with the advent of small low-priced engines, efficient and inexpensive models may be built. The 555 uses a McCoy .049 which retails at $3.95. This is the most expensive item on the bill of materials. With but two exceptions, all materials were bought at a hobby shop. There were no discounts or 'breaks' in prices. Note the list and cost of everything you need to build and fly the 555.
The cost of the fuselage and engine mounts is listed as zero. The mounts are made from a 2-1/2 x 1-1/4 in piece of 1/2 in aluminum which may be obtained from your local hardware store who has a do-it-yourself aluminum display. He usually has many pieces of scrap lying around which he can give you at no cost. The fuselage is made from a piece of pine 3/4 x 3/4 x 181/2 in which you can probably find around your own house. Failing that, a local lumber yard or cabinet maker will have plenty of waste pine that will just fit the bill. Now that everything is bought, and paid for, let's start building. If you have ever built a handlaunch glider, you will have little trouble with the 555.
FUSELAGE: Start by cutting out the engine mounts from the 1/8 aluminum and drill and tap the holes as indicated on the full-size plans. Insert a length of nail in the rear of the mounts. This is force-fitted and acts-as the rear anchor of the mount. Now, bend and form the landing gear from .045 in music wire and bolt it, with a 4-40 bolt, to the back plate of the engine. Don't forget to file a small groove in the bottom of the back-plate ring to anchor the landing gear. Construct the wheel from 1/8 balsa sheet as shown, being sure the two pieces have their grain at 90° to each other..."
Direct submission to Outerzone.
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
Do you have a photo you'd like to submit for this page? Then email email@example.com
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, 2011-2022.
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.