Breezy Senior (oz8745)

 

Breezy Senior (oz8745) by Chuck Hollinger 1961 - plan thumbnail

About this Plan

Breezy Senior. Designed for R/C precision aerobatics, pylon racing or free flight. Wingspan 56in, wing area 576 sq in, wingloading 13oz per sq ft. Airfoil is NACA 2415. Power .09 to .23 engines.

Quote: "Hi Mary & Steve, I like /your kind/ of a free trading zone, so I send you the (still uncleaned) plan of Chuck Hollinger's Breezy Senior. For precision aerobatic, pylon racing or free flight ;-) ...unfortunately no article, I've got only the dignified paper of the plan. Thanks for Bob Boucher's Monterey, I had before in quite poor scans out of the mag. Patrick"

Direct submission to Outerzone.

Update 26/9/2022: Added kit review from American Modeler, March 1958, thanks to RFJ.

Quote: "Scale-like R/C by Babcock.

Breezy Senior kit for R/C sport or competition flying is produced by Babcock Models Inc (Costa Mesa, Cal). Shoulder-mounted taper wing has 56 in span, 576 sq in area, NACA 2415 air-foil. Plane designed for .09 to .15 engine. With Babcock 2-channel equipment shown on drawings, wing loading will be about 13 oz. per square foot. Paper covering furnished. Required to complete plane (other than engine, tank and all radio gear): cement, dope, pair 3 inch wheels, 1 inch tail wheel, engine mounting bolts, rubber bands for wing and landing gear, cloth covering if desired.

Wings will be worn lower if Babcock Models have their say - at shoulder level instead of overhead. And with two sizes of Babcock R/C models now on the market, they should have quite an influence. While externally similar in appearance to Breezy Junior (oz3188), Babcock's first entrant in the R/C model plane kit field, the Senior differs in many re-spects. Designed by the well-known scale R/C expert Chuck Hollinger, this shoulder-winger could be expected to have a scale appearance. It has that Goodyear Racer look with cheek cowling and wheel pants.

The scale-like Breezy Sr should still be capable of some really hot flights. The semi-symmetrical wing will allow inverted flying and outside loops; plans show elevator hinging for either sport flying or advanced aerobatics. Normal hinging is on the elevator leading edge; to get more action you move the hinge line back to produce about 25% aerodynamic balance.

First to catch your eye when you open the box are several sheets of gleaming plastic formed into nose cowling, main hatch cover, wheel pant halves and wing tips. These need only to be cut from the sheets and trimmed. The engine is to be side-mounted, the cylinder hiding inside the cowl. This is slotted for exhaust stack and has several cooling air inlets. Since all test flying was with a K&B .15 engine, the mounts are designed for this power plant. Beam mounting is. depicted. While the plans show use of a balloon tank, there is plenty of room for other types.

Fuselage is a composite structure with sides and forward bottom half all-balsa, stringer-and-paper aft of wing. All formers, fuselage side members, ribs and similar parts come in die-cut sheets. The Instructions carry sketches of every sheet with each part coded; this coding appears on the main drawings and assembly sketches.

With wing and main hatch cover removed, practically the entire forward fuselage half is open from the top making radio installation and equipment maintenance a cinch. The bulkheads form four compartments; largest, 5-1/2 x 3-3/4 x 4 inches high, shows receiver. Battery area is 4 x 3-1/2 x 4 inches high and ahead of receiver compartment. Further forward behind the firewall is space almost as large for fuel tank and engine control mechanism. Behind receiver space is the control department, 4-1/2 x 3-3/4 x 4 inches high.

Needless to say, plans show Babcock radio equipment - Mark II Super compounds for rudder and elevator, motor control escapement, and BCR-7A two-channel receiver. Two antennas for this 465 me outfit position inside wing with 12 inch length of thin music projecting upward.

Wing is tapered, with low dihedral (each tip raised 2-3/4 inches). Stab is thin section with ribs diagonal; fin is built-up with solid balsa rudder.

Landing gear is Cessna type of flat sheet metal; kit includes this formed and drilled. Also in the kit are a plastic prop spinner with necessary hardware, 3/16 inch hardwood dowel for torque rods, two sizes of music wire.

On the plan are details for steerable tail wheel with brake and engine intake throttle. This sheet is about 12 sq feet; there is a smaller one of printed instructions, assembly and flying info."

Supplementary file notes

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Breezy Senior (oz8745) by Chuck Hollinger 1961 - model pic

Datafile:
  • (oz8745)
    Breezy Senior
    by Chuck Hollinger
    from Babcock
    1961 
    56in span
    IC R/C Kit
    clean :)
    formers unchecked
  • Submitted: 16/05/2017
    Filesize: 2414KB
    Format: • PDFbitmap
    Credit*: pikpak
    Downloads: 1188

Breezy Senior (oz8745) by Chuck Hollinger 1961 - pic 003.jpg
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Breezy Senior (oz8745) by Chuck Hollinger 1961 - pic 004.jpg
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User comments

Hello, Herewith a colour picture of a Breezy Senior in 1958 [main pic]. The photo was taken by John Worth. Unfortunately, I do not know who the modeller is. Thanks again for all the good work you do with the Outerzone. Best modelling regards,
JMP_blackfoot - 15/04/2022
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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

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