Smog Hog (oz671)
About this Plan
Smog Hog. RC gas model, for 2 or 3 channels. Winner of the 1956 Nationals.
Quote: "Sensation of the radio event at the last Nationals was this great multi-channel winner. Outstanding are light weight, simple construction, terrific stunt ability.
The Smog Hog was the winner of the multi-class in the 1956 Nationals radio control event, and the California State Meet with a high score of 202 points. The design is the result of many months of designing and flight testing by Howard Bonner. The primary objective of the Smog Hog design was ease in building, low maintenance, ability to perform all the maneuvers required and still have a light enough wing loading for doing these maneuvers tighter and quicker without excessive losses of altitude.
The airplane is simple enough for the beginner, but still lets the expert add his little changes. As the design stands now, it is a top notch contest performer. Although a C.G. 5-channel receiver and the new Bonner servos were used for the winning flights at the NATS, it has gone through a full stunt pattern (inside and outside loops too) with a single channel Deltron receiver and Bonner's Vari Comps cascaded. This single-channel version won the 'Mickey Mouse' Class of a recent LARK'S contest.
The Smog Hog is a fully stuntable radio controlled model with hands-off recovery. This means you can relax when out for week-end pleasure flying, or you can wring it out in competition. If you should ever become confused (and who hasn't) or get too excited during a maneuver, returning all controls to neutral will let the airplane recover itself.
The size of the fuselage cabin permits the installation of any receiver on the market today with plenty of room left for batteries, servos or escapements, and your hands. The latest ideas for a practical, easily maintained model have been used, such as as two-wheel knock-off type landing gear, an expandable engine mounting plate that permits quick engine changes in the field, or it will break before damaging the engine and fuselage in a crack-up. Another unusual idea is a visual fuel supply in a crash-proof 4 oz. plastic squeeze bottle (holds Withold Clue) that has been modified to function as a clunk tank. The tank is mounted outside the fuselage aft of the engine, where It can be easily removed for cleaning, and is held on with rubber bands.
Since construction details are clearly shown on the plans, it is not necessary to go into a detailed construction discussion. However, highlighting a few points will enable the less experienced modeler to duplicate this fine model and it's superb flight characteristics.
The fuselage is the conventional strong box-type with sheet-balsa sides, top, and bottom. Side uprights help prevent the sunken appearance so prevalent oo slab sided models. The windshield and side windows are not cut out, but are painted on to increase the strength of the cabin area. The flat windshield helps give some of the drag necessary to get a lower power-on and power-off speed differential. Parallel fuselage sides aid in squaring up the fuselage during the initial stages of fuselage assembly..."
Update 22/06/2012: Added a clearer scan of this plan, with some pics, courtesy of theshadow.
Update 04/07/2013: Added remaining missing article pages, thanks to edpickart.
Update 13/03/2018: added additional article (Aeromodeller, April 1957), thanks to RFJ.
Update 15/03/2018: complete MAN article added, thanks to theshadow.
Supplementary file notes
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by Howard Bonner
from Model Airplane News
IC R/C Cabin
all formers complete :)
got article :)
Found online 21/04/2011 at:
Format: • PDFbitmap
Credit*: starcad, theshadow
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User commentsHi Outerzone, I enclose a few photos of my Smog Hog, for adding to this plan, should you find it applicable [more pics 003-005].
BJansson - 27/05/2016
Hi, here are 3 black and white film scanned negatives for use on Outerzone [more pics 006-008]. It's a Smog Hog I have built from the plan on Outerzone. I changed a few things, the fuselage is now build up and not sheet, engine an older OS 35.
Anon - 06/02/2017
Hi Mary / Steve - here are 3 photos of my recent build Smog Hog from the plan on Outerzone [more pics 009-011]. Its fuselage structure is changed from sheet to build up but when covered it looks much the same. The wing I also simplified, engine is an OS 35 plain bearing, it flies well.
Anon - 28/04/2017
Smog Hog, October 1957 [more pics 012]. L-r: my Dad Gene (suffered a broken neck from H.S. Football), my little brother Ken, and me. Built from M.A.N. plans.
SteveNelson_CA - 01/10/2018
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