Royal Coachman (oz9845)


Royal Coachman (oz9845) by Don Dewey from Sterling - plan thumbnail

About this Plan

Sterling Royal Coachman. Radio control sport trainer model for .09 to .15 power.

Quote: "Our prototype balanced slightly aft of the point shown on the plans. With the Annco servos we added three dead peacells to the battery compartment for ballast. With the light additional weight of the Royal MK multi servos, two of these were removed.

If you have built the Royal Coachman according to plans, you will have no difficulty with initial flights. Use a 7x4 prop on the Cox .09 and an 8x4 on the .15. If your landing gear tracks straight and true, the Coachman will lift off with a slight tap of elevator in about fifty feet. As mentioned earlier in the article, flying this model with an .09 is simplicity itself - it is docile, yet will perform simple, basic maneuvers with six channel gear - an excellent trainer and sport ship for the Sunday flier. But add a .15 and you've got a fast moving ship that's quite a handful.

We hope you like ease of construction and the many hours of flying pleasure you'll get from the Royal Coachman. "

Quote: "Hey there, here is a companion to your RCM Royal Coachman (oz1302) plan. This is a plan I just found at Hobby Warehouse in Richfield, MN which the shop owner kindly gave to me for this purpose. This Sterling kit plan seems to include the RCM article on it. Sorry about all the notes and sketches on it, but at least it will make it less than desirable to the e-bay resellers. The plan was in quite a sorry state, and please note the error right down the middle of the fuselage layout. The plan had been taped back together rather badly but its too fragile to fix. Dave"

Direct submission to Outerzone.

Update 05/03/2018: Replaced this plan with a cleaned up version, thanks to rchopper56.

Quote: "Hi Steve and Mary, I spent some time yesterday cleaning this drawing. It is a typical kit drawing in that it is incomplete, missing some info for the top view but no problem for an experienced modeler, you just know its width from the back of the wing to the nose.
The drawing itself has had a lot of 'travel' and may not be a scan of the original kit supplied drawing. I contacted Dave to be sure if the hand sketches that were removed was OK with him. Gene"

Update 03/10/2019: Added kit review from Radio Modeller, August 1969, thanks to RFJ.

Quote: "Kit Review: Royal Coachman. Sterling's 42 in span quickie, described by CJ Foster.

THE Sterling Royal Coachman is not exactly a new kit but, as I was looking for something rugged and quickly built, it appealed to me, in spite of its ugly duckling appearance. And quickly built it certainly is, believe me. One's first impression, on opening the box is: What a lot of wood. This is mainly because of the fully sheeted wings, of course, but one must carefully sort out the sheet wood for its respective uses. The plan is a very comprehensive one - not only is every part shown full-size, but a large number of step by step exploded views leave nothing to guesswork.

The fuselage is built flat on the building board, and is unusual in that the tail unit (all sheet) is built integral with it, thus ensuring its being set at the correct alignment. There is no need to remove the structure from the board until you are ready to fit the undercarriage. This is pre-shaped, the only work required being to solder the streng-thening bar to the main legs. The engine is mounted on the front firewall, without any sort of cowling, the original intention being for a radial mounted engine, which has given me the opportunity to use my OS .19 fixed on a Micro-Accessories nylon mount (the engines specified are .09 to .15 so with my OS .19 I added an extra couple of degrees of downthrust.)

The wings, as mentioned, are completely sheeted and, in fact, are 'built on to the sheet'. All the ribs are from 1/4 in and 3/32 die-cut-sheets. The die-cutting had just a little crunchiness, but pressed out cleanly enough, only a slight touch of sandpaper being needed to make them first class. The sheets for the lower surface of the wing are butt jointed..."

Supplementary file notes

Previous scan version.


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Royal Coachman (oz9845) by Don Dewey from Sterling - model pic

  • (oz9845)
    Royal Coachman
    by Don Dewey
    from Sterling (ref:FS-19)
    41in span
    IC R/C Cabin
    formers unchecked
  • Submitted: 01/03/2018
    Filesize: 963KB
    Format: • PDFbitmap
    Credit*: dfritzke, rchopper56

Royal Coachman (oz9845) by Don Dewey from Sterling - pic 003.jpg
Royal Coachman (oz9845) by Don Dewey from Sterling - pic 004.jpg
Royal Coachman (oz9845) by Don Dewey from Sterling - pic 005.jpg
Royal Coachman (oz9845) by Don Dewey from Sterling - pic 006.jpg
Royal Coachman (oz9845) by Don Dewey from Sterling - pic 007.jpg

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Download File(s):
  • Royal Coachman (oz9845)
  • Plan File Filesize: 963KB Filename: Royal_Coachman_Sterling_oz9845.pdf
  • Supplement Filesize: 2192KB Filename: Royal_Coachman_Sterling_oz9845_previous.pdf
  • Supplement Filesize: 939KB Filename: Royal_Coachman_Sterling_oz9845_review.pdf
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