Curtiss Y1A-18 (oz2752)
About this Plan
Curtiss Y1A-18 Shrike II. Rubber scale twin from June 1938 by Herb Weiss. Twin engined ground attack plane.
Quote: "Developing a total of 2,000 hp in her Wright Cyclone engines, Curtiss' new, deadly Army attack ship, the A-18, is rated among the fastest twin-motored military machines in the world. Actual details as to her performance and armament are still a military secret, but you can bet she's no slouch when it comes to speeding her gun-bristling form through the air. Nor is Herb Weiss' model of the A-18 any slouch, either - as you'll quickly discover when you line up his plans and construct it. Build the Curtiss A-18, by Herb Weiss.
KNIFING through the air at over 300 mph, the Curtiss A-18 attack plane is one of the world's fastest twin-engined military jobs. It might even be possible to class it as the fastest, were it not for the secrecy surrounding modern war planes which prevents us from making any accurate comparisons.
The A-18 started out in life as the XA-14 experimental model, featuring an all-metal fuselage of monocoque design and a monospar wing of fabric and wood. It was powered with a pair of 825 hp Wright engines. (Three-view plans for the XA-14 were printed in the May issue of FA for our solid model fans - Editor).
Service ships developed from the basic XA-14 design were built to fill an Army order amounting to $1,259,000 and were designated the Y1A-18's. They were powered with 1,000 h.p. Wright G Cyclones. By the time this appears in print, the ships will have "come into their birthright" and will be known as full-fledged A-18's. A multi-place ship, the A-18 shelters its pilot and gun-ner in cockpits with transparent hoods. The landing gear is retractable, of course. The craft has an extremely long range and is well able to raid enemy lines at very low al-titudes. Wing-span of the new plane is 59 ft 6in, and the length is 40 ft 6in.
Our model of the A-18 is unconventional, in that motor sticks have been dispensed with. At first glance this might seem to be a foolish omission, especially when it is considered that the stabilizer must withstand the full tension and torque of two motors. However, the original model, braced as shown in the plans, proved quite strong enough for these imposed stresses. The chief precaution to be taken in building is to make sure that members meet cleanly at each joint, and that all cementing is done thoroughly and carefully.
Begin construction of the model with the wing (Plates 3 and 4). Either make a universal plan for the left half of the wing - which is to be built as one piece with the right half - or simply transfer the dimensions with a ruler. For a flying model omit the even numbered ribs (Rib No. 1 is on Plate 2. The others are shown on Plates 1 and 3). When the wing is assembled and the cement has dried, cut across the rear spar with a razor at ribs No. 1, and give each side of the wing two inches of dihedral at the tip..."
Update 24/07/2015: Replaced this plan with a clearer copy on a single sheet, thanks to AllenHunt, AugustaWest.
Supplementary file notes
Previous scan version (includes article pages, text and pics).
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
by Herbert K Weiss
from Flying Aces
Scale Rubber F/F LowWing Multi Military Fighter
all formers complete :)
got article :)
Found online 12/04/2012 at:
Format: • PDFbitmap
Credit*: cougdave, AllenHunt, AugustaWest
Curtiss_A-18_Shrike | help
see Wikipedia | search Outerzone
ScaleType: This (oz2752) 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/Curtiss_A-18_Shrike
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.