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ICM 1/48 UC-45J “Bug smasher”:

February 20, 2016 in Aviation

In 1936, Walter Beech speculated that developing a light twin-engine passenger-carrying aircraft could have good commercial prospects as an executive transport for business, a “feeder airliner” providing service to smaller airports and passenger markets, and as a utility aircraft for the military. The result was the Model 18, the first all-metal cantilever monocoque design by Beechcraft. The design could carry 6-9 passengers and two pilots, and was powered by two radial engines. The initial engines used ere either the 330 Hp. Jacobs L6 or the 350 hp Wright R-760E. The 450 hp Pratt & Whitney R-985 became the definitive engine used for the rest of production from the Model C18S onwards.

The first prototype flew on January 15, 1937. The airplane was frequently mistaken for the Lockheed Model 12 Electra, which was larger than the Beech design. By the time of Pearl Harbor, the Lockheed design had outsold the Model 18 two-to-one, with only 39 Model 18s sold. However, Lockheed was forced to cease production of the Model 12 in favor of military aircraft, leaving the field open to the Model 18. Over 4,000 Model 18s were built in various sub-types during the war, including the AT-7 twin-engine pilot trainer and the AT-11 bombardier, navigation and gunnery trainer. Between 1937 when production began and 1970, when the Model 18 was phased out, over 9,000 Model 18s were built. Both the USAAF and US Navy made wide use of the aircraft, known as the C-45 to the Air Force and the JRB (personnel transport) or SNB (trainer) to the Navy prior to 1962.

After the Second World War, between 1951-55, many of the earlier Model 18s were remanufactured by Beech, with an enlarged engine nacelle providing better aerodynamic smoothness, while an extended leading edge between the engine and fuselage provided better low-speed stability, which brought the military aircraft up to the production standard of post-war civilian Model 18s. The remanufacutred aircraft were known as the UC-45J in the Air Force and the SNB-5 and SNB-5P in the Navy. After 1962, the unified designation system was adopted with all services designating it UC-45J. The Air Force phased out its UC-45s in 1963, while the Navy used the aircraft until 1972 and the US Army flew it until 1976. In its later years, the C-45 was universally known as the “bug smasher,” through its extensive use by deskbound military pilots to get their minimum flight hours to qualify for flight pay. Through 33 years of production (a record at the time),32 variations of the basic design were flown and over 200 improvement modification kits were developed. The Model 18 was the premier executive transport until the introduction of the Learjet in the early 1960s.

Yours truly has had a love/hate relationship with the Model 18 for the past 52 years, having first laid hands on an airplane’s controls in 1964 when I put in a few hours as “passenger” for the Staff ASW Officer of Commander Patrol Forces 7th Fleet, buzzing rice paddies in Okinawa, and then losing my 1947 Model 35 Bonanza when a Union Flights Turbo-18 lost an engine on takeoff at Sacramento Executive airport in 1978 and crashed into parked aircraft, including my Bonanza.

The Model 18 has had a few kits made over the years. The first plastic kit was by Comet in the mid-1950s, to “box scale” that approximated 1/48. Pioneer released a 1/72 kit in the late 1980s. Battle Axe made a limited-run 1/48 kit in the 1990s that was so difficult I ended up tossing mine; I do know of at least two people who managed to persevere through to completion. This kit by ICM is the first kit of the Model 18 to modern standards.

The kit has some shortcomings, most obviously the grossly-overdone fabric effect on the control surfaces. Whether a modeler is going to do a C-45F or a modernized UC-45J, the overdone rib detail has to be sanded off. The interior seats are very fiddly in construction and getting the cockpit interior that is glued to the lower wing into the assembled fuselage can be tricky. Decals are for World War II era American aircraft, and for a French and Italian Air Force operated C-45F. Revell-Germany has recently released this kit under their banner, with different decals.

Mike West of Lone Star Models has released a conversion set to do the later remanufactured UC-45J, which includes the extended upper engine nacelle and extended inner wing in resin, and the different main gear legs in white metal. Lone Star also produces a more extensive conversion to turn the model into an AT-11 trainer. Caracal Decals has released sheet 48076 which includes several post-war Navy and Air Force UC-46J aircraft.

Since I wanted to do the UC-45J, I bought the Lone Star Models conversion. I began by making these modifications. The upper engine nacelle and the inner leading edge of the wing have to be removed. The resin nacelle replacement is attached, and then the wing sub-assembly is built according to instructions. Once the upper and lower wing parts are assembled, the inner leading edge extension is attached.

I then assembled the fuselage according to instructions, and then built the seats and installed them in the lower wing per the instructions, then attached the fuselage and wing sub-assemblies. At this point, I applied Mr. Surfacer 500 to the resin parts and smoothed out the joints. I then sanded all the fabric detail off the control surfaces, assembled the tail and attached that to the fuselage.

I wanted to do my model as a well-used Navy UC-45J. These airplanes were originally painted gloss white and gloss red-orange, but the finish rapidly deteriorated to an overall flat finish since the airplanes were almost always parked outside. This was particularly the case for airplanes stationed on fields near the ocean, where salt air contributed to the flattening process.

I painted the model overall gloss black, masked off the de-icer boots on wings and horizontal stabilizer and the enti-flare areas of the nose and inner engine cowlings and nacelles, then applied Tamiya Gloss White. The result was an “uneven” finish that implied wear and tear. I then mixed Tamiya Orange and Gloss Red, and after masking off the white areas, applied this color with an “uneven” finish. I then lightened the red-orange color and went over the painted area, since the red-orange paint oxidized as it flattened.

I unmasked the model and applied a coat of clear gloss before applying the decals. The Caracal Decals went down without problem. I finished by applying a coat of Clear Flat overall to the model. The windows were unmasked and the props and landing gear attached.

The ICM kit provides a good basis for making whatever variety of Beech Model 18 you might wish to do. The Lone Star Models conversion is not difficult, and the Caracal decals provide several very colorful markings options.

17 additional images. Click to enlarge

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12 responses to ICM 1/48 UC-45J “Bug smasher”:

  1. Maybe ICM will take pity and do a late model C-45. Either way TC your work done on this kit with the resin goodies makes for interesting model that is not seen too often on the tables of modeling shows. I’ve always had a interest in the Beech 18 since I flew in one on a fishing trip. It was mounted on floats and had the wing tips extended. We had to taxi around the lake until the cylinder heat temps warmed up before take off. The interior of the bird was bare bones. Like the photos of the resin and seam work …it helps to see some of the bare bones of the kit. Two thumbs up on this one TC.

  2. Nice work Tom. Tempted to pick one up.

  3. Always liked the older twin engine birds,
    Nice build

  4. Good looking twin. Nice to see a high-vis scheme!

  5. TC, that crashed 18 probably did you a favor, the Bonanza, “fork tailed doctor killer” was an unlucky bird.

    • Actually, the Bonanza is a great airplane. The “problem” is that it was aerodynamically advanced (my 1947 “straight 35” had flush riveting throughout, gap-sealed control surfaces, fully enclosed retractable gear (it did 160mph on a 160hp Franklin). Your typical “Legend in his own mind” MD (usually a surgeon), who can never be told a damn thing, would go flying into conditions beyond his limited abilities and the next thing he knew he was in a terminal spin. All those accidents were “pilot error.” If you were current and competent, a Bonanza was a lot of fun. Still is.

  6. Nice paint &build ! Tom

  7. Nice looking alternative to all the camo’d military stuff flying around! Good looking build – I don’t have one of these in the stash – may have to look for that 1/72 Pioneer kit…

  8. Hey just joined about 10 min. ago, there was also a 1/72 Hobbycraft c-45f. Looks like a pretty good kit.

  9. Tom, great work and a beautiful model. I just missed an opportunity to take a ride on a Marine bird due to weather problems. I still remember the experience of sitting in the passenger area. Your build brings back some fond memories. Clark

  10. Good looking model, Tom, brought back some good memories of my barnstorming days chasing Twin Beeches and DC-3’s around. Our Bugsmashers were modified with extended noses, PT-6 turboprop engines and taller cabins for hauling cargo. We also had a tricycle gear Volpar Beech 18 with Garrett engines. Lots of interesting mods were done to those airplanes that would make for some neat models.

    This photo is of one of the airplanes I spent the most time with. N432U is in front of the Brownsville Aircraft and Avionics Company shop in Brownsville, TX in late 1981… she’s still flying today.

  11. A classic, There’s a movie from the 60’s It’s mad mad mad mad world with Model 18 being put through it’s paces. there’s even a shot of it flying through a hanger.

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