Seamaster 40 (oz10212)
About this Plan
Ace Seamaster 40. Radio control sport seaplane model. Wingspan 59-1/2 in, wing area 725 sq in, for .40 - .45 power and 4 channel radio.
Quote: "Seamaster 40. Designed by Ken Willard.
The Ace Seamaster 40 is designed and engineered to provide you with a nice looking, easy flying amphibian that goes together in a minimum amount of time with a minimum amount of frustration. Please read and follow these instructions to insure that these two goals are accomplished.
We recommend the use of modern cyanoacrylate (CyA) glues for the most part. There are many brands available (Jet, Pic, Pacer, Alteco, Hot Stuff, etc) and they all have three basic viscosities available: thin (for close fitting balsa joints), thick (for plywood, hardwood, and not-so-perfect balsa joints), and very thick (for joints where a filet or 'bead' is required.) For the most part, we recommend the thick variety used in conjunction with an accelerator or 'setter' which cures the glue upon com-mand. Epoxy is recommended for the engine nacelle compo-nents. Of course, any modeler has his favorite techniques of gluing but keep in mind that this is a water-going craft and water has a way of getting into everything, so don't use water soluble glues.
There are a few things to keep in mind when building this kit with its lite ply construction. It's a wonderful material that has a tremendous strength to weight ratio and is easy to work. It should punch out of the die cut sheets easily; if not, sand the back of the sheet a bit. Some cutting with an X-acto knife may be needed. Some warping of the material is normal and the key lock construction technique eliminates this being a problem. Also, one side of the lite ply is generally beuer than the other which may have some dark streaks, knots, and fill. Simply keep the good side to the outside of the structure.
We have used various finishing techniques on the prototypes, all of which were successful. Plastic film is the quickest, easiest, and usually prettiest. BUT, keep in mind again that water permeates everywhere so overlap the joints at least 1/4 in and reseal all edges a couple of times to make sure the joints are secure, especially in the hull area. It would be a good idea to go over all the exposed edges with very carefully applied thin CyA.
If you choose to use paint, we recommend that the hull be fiberglassed with 3/4 oz cloth and resin, or cover it with Silkspun or Supershrink Coverite before painting. Avoid too much paint buildup so weight doesn't accumulate.
Although the plane looks bigger, a good .40-.45 two cycle or a .60 four cycle flies the Seamaster nicely; don't be tempted to put a screaming .60 schneurle two cycle on it - the plane is not structurally stressed for it. Realize the Seamaster 40 is not a pattern ship; it is a mildly acrobatic sport ship for pleasing, predictable performance off land and water.."
Direct submission to Outerzone.
Note: Original plan scan by MileHighHerbaFly to RC groups at https://www.rcgroups.com/forums/showthread.php?3088011-Looking-for-Ace-Seamaster-40-Plans
Supplement file of Ace R/C kit manual, (complete, 12 pages) thanks to aspeed, found online at https://www.rccanada.ca/rccforum/showthread.php?p=2337826
Supplementary file notes
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 firstname.lastname@example.org
User commentsAre there no drawings for the bulkheads?
anon - 07/07/2018
This is all we have here. It was kit plan of course. Anyone got more on the formers?
SteveWMD - 07/07/2018
Although we do have two other versions of the Seamaster plan, so maybe that helps. Three, if you count the Seamaster II. Maybe check this one against the others?
SteveWMD - 07/07/2018
Hello, Outerzone. The missing bulkhead drawings from the ACE Seamaster kit plan are not a big issue, since they can easily be drawn from the existing info. The plan shows both the width and height for each station. And we know that the plane has tumblehome sides. However, the horizontal stabilizer is missing and that could be a bigger issue until you know the history. Mr. Willard states in his article on the Seamaster II oz5899 that it is identical to that on his Headmaster Sport 40 oz5877, for which the plan was published in RCM and the design was later kitted by Top Flite. So the solution is simple. That would be the same plan which you have listed, which has the stab.
MatthewStikeman - 30/10/2018
Added nice pic of the completed model, thanks to LucD [more pics 003].
Mary - 21/01/2019
Hi Mary! These are additional photos of the “SEAMASTER-40” [more pics 004, 005].
LucD - 17/08/2019
I have built the Seamaster 40 and the Seamaster 2.
The later is a smaller version of the .40 for a .25 size engine. No parts are transferable between the two versions but they look similar.
Steven Swinamer - 28/07/2020
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.