Simplex 40 (oz77)
About this Plan
Simplex. Free flight gas model. A later, 40in wingspan version of the original Paul Plecan design, for 2 channel RC, engines up to 1cc.
Quote: "Build a mini version of Paul Plecan's original 1947 sports flier SIMPLEX.
First published in Air Trails of September 1941, Paul Plecan's Simplex (oz3073) set many remarkable standards which were little appreciated at the time. The original 5ft model appeared to British eyes as a skimpy, unrealistic typically American lightweight box car; but it was far from being that. For a start, Paul built the original far an equivalent cost in muterials of 50p or $2.50) - in those good old days when the pound was the equivalent of five dollars - add a seven dollar engine and $1.25 timer and you Had a complete 'gas job,' ready to fly for an investment of just aver £2!
Paul used a Sky Chief on his prototype, added the pull out battery tray arrangement with knack off motor mount bulkhead and by his eleventh flight he had the first out of sight of 33 mins from 15 sec engine run.
In times of stringency, when Brits were banned from flying power models and more used to bulkier, heavier cabin designs, Simplex came as a breath of fresh air and there must have been hundreds of expatriate aeromodellers from the old country displaced through the Commonwealth Air Training Scheme to Canada, Rhodesia, South Africa and the USA who cut their teeth on Bantam and O&R powered 'Simplexii'. They all found that Paul's model was just the job to tuck under thr barrack room bed between sessions of air training. So it is no wonder that 'Simplex' should re-emerge in fond reminiscence among the membership of SAM. Douglas Tennant has a clutch of them including this 40in, version for the Mills .75 diesel and at only 11oz all up it is naturally a spritely performer. Over to Douglas for his description..."
Update 28/11/11: this plan now re-scaled to print at correct full size.
Update 08/02/2017: added article, thanks to tonyc.
Supplementary file notes
Article.
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-
(oz77)
Simplex 40
by DA Tennant
from Aeromodeller
June 1984
40in span
IC F/F R/C
clean :)
all formers complete :)
got article :) -
Found online 02/04/2011 at:
http://www.rcgroups.com/forums/showthread.php?t=1265873
Filesize: 337KB
Format: • PDFbitmap
Credit*: r/c junkie
Downloads: 4731
Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk
User comments
Hi Steve, A couple of years back - 2010 to be exact ... a challenge was made to our RC Flying Club. The challenge was to build a Vintage Model & make it RC assisted if need be & to prepare for a 'Vintage Fly-in' which was to be held at our club. I decided to build the SIMPLEX as per your plan No.77. Once again I had the original plan in hand and the results are shown in the attached photos [see more pics 004 - 007] Credit: Bernard & Petro Odendaal. My Simplex initially flew with a 1964 PET OS (.099) which I reconditioned and she flew like a dream - the only problem being the absence of a throttle.... I subsequently installed a Brushless EP setup. My Simplex still flies frequently and I want to encourage anyone reading this to build yourself one of these delightful little Vintage Models. Kind regards,BernardandPetro - 19/07/2014
Photo of my 1/2A Simplex (oz77) two- function r/c [mainpic]. Covering is Esaki tissue over doculam. Engine is MP Jet .040.
Alan Wooster - 07/07/2021
This is my Simplex 40 built using this plan [009, 010]. The plane flies very well with a flying weight of about 480 grams using 2 ch radio and the engine is Mills .75 cc,from Bkk th. thanks.
Pol RC Diesel - 22/11/2022
My newly completed 40-inch Simplex [pics 011-013] was constructed from Outerzone plans of the Aeromodeller version. The 3-channel electric-powered model is covered with Ultracote Parklite. First flight was achieved today and revealed a few quirks to be remedied, but it certainly flew! It has been a gratifying project.
Mark Fineman - 12/07/2023
How is everyone finding there Simplex in the ROG I'm having trouble tracking on the ground
Bernie - 09/10/2023
Bernie: My electric-powered Simplex has been trimmed and is flying nicely. ROG takeoffs are lively; no problem.
Mark Fineman - 19/10/2023
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- Simplex 40 (oz77)
- Plan File Filesize: 337KB Filename: Simplex_40_oz77.pdf
- Supplement Filesize: 898KB Filename: Simplex_40_oz77_article.pdf
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Notes
* 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.
Scaling
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.
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