RCM Trainer (oz5306)


RCM Trainer (oz5306) by Joe Bridi 1972 - plan thumbnail

About this Plan

RCM Trainer (AKA RCM Advanced Trainer, AKA RCM Trainer 60). Radio control trainer model for .40 to .60 size engines. Wingspan 58-1/2 in, wing area 673 sq in.

Quote: "The RCM Advanced Trainer, designed by Don Dewey and Joe Bridi, can be built either from the kit from Bridi Hobby Enterprises, 23625 Pine-forest Lane, Harbor City, California 90710, or can be built from the construction notes in this chapter along with the full site plans available from R/C Modeler Magazine Plan Service, P.O. Box 487, Sierra Madre, California 91024. The price of the kit is $44.95 and the price of the plans are $3.00.

The Advanced Trainer is designed for the novice who has gained the necessary training experience on the Basic Trainer, or for the beginner who has an experienced instructor who will stick with him during the training phase.

The RCM Advanced Trainer has 672 square inches of wing area with an all-up flying weight of from 5-1/2 lb to 6-1/4 lbs. Although designed for a .40 to .61 cubic inch displacement engine, we strongly recommend the use of a K & B .40 or O.S. Max .40 RC engine for your training flights. Later, you will find that this aircraft will be capable of all the maneuvers in the AMA and FA1 pattern when a .61 engine is installed.

The photographs accompanying this article were taken by the RCM Staff building the Trainer from the highly prefabricated kit from Bridi Hobby Enterprises. The total assembly time, less covering and installation of radio, engine, and hardware is 0-10 hours. Following the instructions and photographs for building the Advanced Trainer from the kit, a reduced set of plans and instructions will be provided for those who wish to build from the plans available from R/C Modeler Magazine... "

Direct submission to Outerzone.

Update 12/07/2016: Added article thanks to davidterrell80. This is actually a chapter from the RCM-published Flight Training Course (FTC) (1st ed. 1972). The 'article' (chapter 9 in the FTC) is entitled 'RCM Advanced Trainer' and the 'Advanced' name is consistently used throughout. However, the plan is entitled 'RCM Trainer' which can cause confusion with RCM plan number 354, the RCM Trainer (oz6537) by HL Stroup.

Update 12/10/2018: Added PDFvector plan tracing and CAD files, thanks to AlanSinclair.

Supplementary file notes

Article pages, text and pics.
PDFvector plan tracing.

CAD file

This plan is available for download in CAD format.


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RCM Trainer (oz5306) by Joe Bridi 1972 - model pic

  • (oz5306)
    RCM Trainer
    by Joe Bridi
    from RCMplans (ref:476)
    January 1972 
    58in span
    IC R/C Cabin Trainer Kit
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 04/02/2014
    Filesize: 586KB
    Format: • PDFbitmap • PDFvector • CADfile
    Credit*: DaveStroble, AlanSinclair
    Downloads: 9966

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User comments

Hello Steve, The RCM trainer by Joe Bridi was once published in Flug in 1973 (a German magazine, predecessor of FMT) but was renamed to Donjo. My father built it for me in 1994 as my second plane but sometimes life has different plans. It never flew and after more than 20 years still waits on its maiden which REALLY should happen once. I attach a picture of my Donjo in a quite eclectic colour scheme [more pics 003, 004]. Remind: it was build in the '90s and the covering scheme was chosen by a '90s teenager ;)
Dries - 22/04/2016
Here are a couple of photos of the RCM Advanced Trainer I maidened yesterday [more pics 006, 007].
Anon - 05/05/2017
A couple more photos of an RCM Trainer 60, built from OZ plans and a short kit from Rob at www.balsaworkbench.com [main pic, 008]
Scott Wallace - 25/09/2020
Hello Steve and Mary, I've send you some photos some years ago of my RCM Trainer, and I stated then that it was constructed in 1994. However, it was constructed in 1999, as a small note in the plane revealed. But more importantly, it took the skies last summer [pics 009-012]. I converted from a .40 O.S. engine, to an electro setup. Motor SK3 4240, kv=620. 60A ESC and a 11x8 prop with 5S 3300 mAh LiPo. Here under you can find some more pictures and I made a small movie about
it too: https://youtu.be/CBspCXqMmsI
All the best,
Dries - 09/12/2020
Hello everyone, My name is Bob, and I’m building the Joe Bridi RCM Trainer oz 5306 in honor of my cousin Mike who recently passed away at the age of 83. Since it was his kit, I decided to take on this enormous task. The problem is that I’ve never constructed a balsa wood model plane before. I’ve looked at the pictures, and followed the kits plans, but I don’t know if I’m doing it correctly. I would appreciate if someone would give me a little direction, and guidance in order to complete this project, and get the plane up in the air in his memory Thank you. Regards, Bob Toboy
Bob Toboy - 03/03/2021
Bob, look up YouTube there is a wealth of information on that site.
John Green - 03/03/2021
Bob, I'd suggest you and start a build thread on RCGroups, maybe in the Balsa Builders forum - there are many forums on there. Lots of wise and helpful people on RCG, I think you'd get useful answers as you went along that way. But you'd need to start an account first and then get up to speed with using the forum, of course.
SteveWMD - 03/03/2021
Also (thanks Jeff) be sure to download and read through the supplement article file from here which is good and very thorough (at 15 pages), with lots of pics showing the stages of the model being built.
SteveWMD - 03/03/2021
Thanks, much guys... I appreciate the input. I’ll give it a try.
Bob Toboy - 11/03/2021
Hey guys, I’ve made some progress on the Joe Bridi oz5306 rcm trainer. I can’t seem to find some pics, or suggestions on how much the balsa filler blocks should be sanded for the wing tips... in turn for the Monokote covering. Any advice would really help. Thanks,
Bob - 18/04/2022
RCM 60 wingtips: I haven't built one but have flown many. You can't go wrong with this model. I've used the same style wingtips on many models though. They're not easy to cover, compound curves. Don't even think about covering them with the same piece of MonoKote used on the wing. Use separate pieces for the tips. You'll have to stretch and shrink the film to get it to fit, not easy but it can be done after several tries. On mine, I sanded the triangle braces to a concave shape so the MonoKote would not show thru. At least 1/8" should be enough. If you prefer, just use a 1/4' balsa tip the same shape as the rib and round the edges slightly, easy and it flies the same.
doug smith - 19/04/2022
Hi Doug, Did you mean you sanded the balsam filler blocks to a concave shave? Or, the outside tip block to a concave shape. I appreciate your feedback. I’m just not sure how to shape the balsam filler blocks so that I can apply a small piece of monokote to a small area on the wing tip. Thanks again for your patience. It’s been a journey.
Bob - 20/04/2022
There's a page here on covering wingtips, see: https://www.modelairplanenews.com/covering-that-pesky-wingtip/ might be useful.
SteveWMD - 20/04/2022
Bob, the plan doesn't show it very well, but there is another set of triangle filler blocks located at the main spar to re-enforce the tip. These are the ones I sanded to a concave shape, using sandpaper wrapped around a large dowel. That way the MonoKote never touches them. Stretching the covering over the tip tends to give a slight concave appearance, not smooth if you leave the blocks straight. Leading and trailing edge blocks can be sanded straight as shown. Not a big deal, the hard part is just getting it covered without wrinkles.
Doug Smith - 20/04/2022
Steve, and Doug,
Those are very useful tips, and suggestions. Now, I feel a lot more confident in working, and covering the wing tips. And, what a relief it is to get some solid advice from guys like you. Thank you again. I appreciate it. Bob
Bob - 20/04/2022
How many servos are used in properly flying the Joe Bridi 1972 RCM Trainer plane… And, what are the best servos I can install for a more controlled flight.
Bob - 27/10/2022
I am building for a customer the RCM Trainer. It is a very attractive and very good advanced trainer. It is very similar to the Kaos and also easy to build. I suggest you install five standadr servos. Why five? Because I am a strong advocate of using a single servo for each aileron. This produces a much precise response and it aids the possibility of having "flaperons".
Don't waste your money in expensive so-called "digital" or fancy servos. Standard medium size like the Futaba 3004 are fine and they won't empty your bank account. You'll enjoy this aircraft to the full. Joe Bridi designs are simple yet with an excellent performance. He was a genius and a wonderful guy. And finally: keep it light!!! Good luck, all the very best from Colombia.,
Eduardo - 27/10/2022
Eduardo, Thank you for the quick response. That makes sense to me. This is my first RCM Balsa plane in which I’m trying to build. My cousins husband (Carlos) is also from Colombia.
Bob - 27/10/2022
Eduardo, What wire size push rod did you use for the futaba servo 3004? A 2-56 Rod? Or, the 4-40 wire push rods. Thanks,
Bob - 02/11/2022
Hi, Here are photos [pics 013-017] of an RCM Trainer 60 (blue trim) which was built from plans with modifications to be electric powered with an extended 70 inch wing complete with widened ailerons and the addition of flaps. With the modifications, it has proven to be an excellent flying plane. A second one was build at the same time to the same specifications in yellow trim as shown in the last two photos, also equally excellent in flight. You may add these to the outerzone file for this plane to demonstrate how good a design it is for an electric conversion. A Power 46 (670 kv) motor or a Tacon Big Foot 46 (670 kv) motor, either with a 12x8 prop are a perfect setup. Best regards,
Francois Hache - 03/06/2023
I'm reviewing the CAD file and apparently there are many differences with the PDF (RCM original). The PDF seems to be accurate. Some distances are different and there are other major differences like the wing spar is 3/8 x 1/2 on the original and 3/8 square on the CAD.
Ariel - 21/11/2023
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Download File(s):
  • RCM Trainer (oz5306)
  • Plan File Filesize: 586KB Filename: RCM_Trainer_58in_oz5306.pdf
  • Supplement Filesize: 3153KB Filename: RCM_Trainer_58in_oz5306_article.pdf
  • Supplement Filesize: 394KB Filename: RCM_Trainer_58in_oz5306_vector.pdf
  • CAD Zip Filesize: 319KB Filename: RCM_Trainer_58in_oz5306.zip
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