R-985 Wasp Junior Aircraft Engine (universal) 1/48 Scale AR ACA4822

Description: U & azebuy Shop of toys and models from Ukraine DESCRIPTION R-985 Wasp Junior Aircraft Engine (universal) Model AR ACA48221:48 ScaleManufacturer: ARMORYMaterial: plastic injected kit w/ PE & resin partsCondition: New in original packagingHistorical referenceThe Pratt & Whitney R-985 Wasp Junior is a series of nine-cylinder, air-cooled, radial aircraft engines built by the Pratt & Whitney Aircraft Company from the 1930s to the 1950s. These engines have a displacement of 985 in3 (16 L); initial versions produced 300 hp (220 kW), while the most widely used versions produce 450 hp (340 kW).Wasp Juniors have powered numerous smaller civil and military aircraft, including small transports, utility aircraft, trainers, agricultural aircraft, and helicopters. Over 39,000 engines were built, and many are still in service today.Pratt & Whitney developed the R-985 Wasp Junior as a smaller version of the R-1340 Wasp to compete in the market for medium-sized aircraft engines. Like its larger brother, the Wasp Junior was an air-cooled, nine-cylinder radial, with its power boosted by a gear-driven single-speed centrifugal type supercharger. Its cylinders were smaller, however, with a bore and stroke of 5+3⁄16 in (132 mm), giving a 27% lesser total displacement. The Wasp Junior used many parts from the Wasp and even had the same mounting dimensions, allowing an aircraft to easily use either the smaller or the larger engine. The first run of the Wasp Junior was in 1929, and sales began in 1930. The initial version, the Wasp Junior A, produced 300 hp (224 kW).The U.S. military designated the Wasp Junior as the R-985, with various suffixes denoting different military engine models. However, Pratt & Whitney never adopted the R-985 designation scheme for its civilian Wasp Juniors, identifying them simply by name and model (e.g. "Wasp Junior A").Pratt & Whitney followed the Wasp Junior A with more powerful models in the "A series". These had higher compression ratios, greater RPM limits, and more effective supercharging, and they led to the "B series". The first B series model was the Wasp Junior TB, which could maintain 420 hp (310 kW) at sea level and could reach 440 hp (330 kW) for takeoff. The TB was tuned for best performance at sea level; it was soon joined by the Wasp Junior SB, which was tuned for best performance at altitude and could sustain 400 hp (300 kW) at altitudes up to 5,000 ft (1,500 m), with 450 hp (340 kW) available for takeoff. A still later model, the Wasp Junior T1B2, had improved performance at low level, being able to sustain 450 hp (340 kW) up to 1,500 ft (460 m) while still matching the SB's power at high altitudes. The SB and T1B2, and later versions of these with similar performance, were the most popular Wasp Junior models. One later development of the T1B2, the Wasp Junior B4, was especially designed for vertical mounting in helicopters.During the mid-1930s, Pratt & Whitney developed a still greater improvement of the Wasp Junior, the "C series", with an even higher compression ratio and RPM limit. The only type produced in this series, the Wasp Junior SC-G, could sustain 525 hp (391 kW) at an altitude of 9,500 ft (2,900 m) and could produce 600 hp (450 kW) for takeoff. It also included reduction gearing to allow the high-revving engine to drive a propeller at suitable speeds, hence the "-G" suffix. Aviator Jacqueline Cochran flew a special Model D-17W Beechcraft Staggerwing with this engine in 1937, setting a speed and altitude record and placing third in the Bendix transcontinental race. However, the SC-G never got past the experimental stage. Payment Policy We accept only PayPal Shipping Policy We ship WORLDWIDE.We will ship your purchase to your eBay address using AIRMAIL with TRACKING NUMBER. Usually we ship the items the same or the next day after the payment is fully received. The parcel will leave our country (Ukraine) directly from our town (Kiev) without waiting local delivery inside country.All the discounts are given by request.Average delivery time is 7 - 15 BUSINESS DAYS.Returns policy If you did not receive your package within the estimated date as stated in our shipping terms, we'll contact the post office and let you know the whereabouts of your package and assure to refund you 100% if the package is lost.Always make sure contact us before opening a dispute/case or leaving a negative/neutral feedback.As always, your satisfaction is very important to us. FEEDBACK The satisfaction of all our customers is very important for us, so we are waiting for your feedbacks after the delivery.If something is wrong, please, contact us before leaving the negative feedback and we will no doubt settle all the cases. Contact Us We respond to most messages within few hours and all within 24 hours. We are here to assist you. Message us for all questions you have. With love from Ukraine 2017 - uazebuy

Price: 19.26 USD

Location: Kiev

End Time: 2024-11-26T15:15:21.000Z

Shipping Cost: 0 USD