Dear Saxser:
The PIPE Here yet AGAIN...and if you head for
http://www.replicraft.us.fm/PriceList.html
there's a set of SOPWITH Triplane drawings there for you to check out!
The Jim Kiger Replicraft series of drawings are about the BEST available scale drawings you could find for sale...I'm NOT too sure about how expensive that 60.83 Euro cost might be for your budget (that's for the Sopwith Triplane drawings WITH overseas postage to get them to you)
And, if a Tecnopower engine IS a bit too "pricey", you could ALWAYS consider what you'll find at
http://www.rcvengines.com/model_home_page_full.htm
for a really POWERFUL
four stroke RCV "SP" series engine that can even spin a REAL SCALE SIZED PROPELLER for your project! You COULD even get some automobile wheel bearings to mount "around" the RCV SP series powerplant you choose to use...
...and with a set of clear plastic "blades", one each attached to the rear quarter of each of the DUMMY rotary engine cylinders in the nose of your model, that dummy engine could even be made to SPIN, without ANY mechanical connection to the propeller...the dummy engine just spins on the automobile wheel bearings instead, from the propeller's air stream!
Just "some ideas" to consider...I'm thnking about the Glenn Torrance Fokker Triplane with an RCV 120SP myself someday...with a spinning dummy Oberursel Ur II/LeRhone 9J rotary engine in ITS nose!
Hope these helped!
Yours Sincerely,
The PIPE!