Bruce Tharpe Flyin' King

Reviewed by: Richard Fisher - Charleston, SC, USA


Bruce Tharpe FlyinKing
Specifications


  • Wing Span: 80.5 in. (204 cm)
  • Wing Area: 1280 sq. in. (8258 cm²)
  • Length: 60.0 in. (152 cm)
  • Weight: 9.5 lbs. (4.3 kg)
  • Engine: .60 - .75 2 - cycle
    (9.8 - 12.3 cc 2 - cycle)
    .70 - .90 4 - cycle
    (11.5 - 14.7 cc 4 - cycle)
  • 5 Servos required


The Flyin' King was designed to be a versatile utility aircraft. Its big wing and effective flaps make a good load hauler. It has a big cabin area allowing for a variety of loads. Its short fin helps to avoid the towline if used as a glider tug.

The kit is very well packed in a plain cardboard box. All other companies should try to duplicate the quality of the items inside the box. The plans are clear and complete. The instructions are extensive with many excellent photos. The balsa quality is uniformly perfect for its intended use. This is one of the highest quality kits available to the R/C community.

The wing is built in three section. There are no building jigs required. I shortened the outer panel by one rib section, 4", so that it would fit in my vehicle. The center section spar is standard D-tube spruce construction. The shear webs are precut to exact height. You are given the option of building the wings with or without flaps. I chose and recommend the flap option if you are using a computer radio. The flaps are controlled by a single center mounted servo. Each aileron has its own servo mounted in the outer wing panel. The ailerons and flaps are of built up construction.

The fuselage is 5/16" balsa stringer framework, with a 1/8" lite-ply doubler in the forward portion. You are given your choice of a nose wheel or a tail wheel. I chose the tail wheel version. BTE provides a very good tail wheel assembly at additional cost. The angle of cut for each stringer is noted on the plans for those who use a precision saw.

The horizontal and vertical stabilizers are 5/16" balsa framework. Templates are provided to cut some of the required angles.

I covered the model with Ultracote. I powered the aircraft with an O.S. 90 2-stroke engine, with a 14x6 prop.

The initial flight was uneventful. The flaps with compensated elevator were problem free. The model as built gave a C/G on the forward portion of the allowable range. My combination of forward C/G, 14" prop, and gusty wind caused several prop contacts with the ground on landing. I added 4.5 oz. of lead to the rear and that put the CG on the rear of the allowable range. I solved the only problem I had with this model by using a different landing gear that I had in the shop. It gave me an extra inch of prop clearance. This solved the prop-to-ground contact problem.

This is a fine model. A pleasure to build and a pleasure to fly.


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