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BH Harmon Rocket (RV-4) 65'' 20cc Gas ARF

Availability: In stock

Regular Price: $499.99

Special Price: $399.99

No. 159600


Quick Overview

Fly a scale model that is high performance and incredibly unique, the Harmon Rocket! The full scale aircraft is a modified RV-4 with a smaller wing and more power. The model is beautiful, great flying, and well-built. BH Models has done an outstanding job recreating this spectacular aircraft in 1/4 scale!

BH Harmon Rocket (RV-4) 65'' 20cc Gas ARF

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BH Harmon Rocket

65 in. 20CC Gas ARF

Fly a scale model that is high-performance and unique, the Harmon Rocket! The full-scale aircraft is a modified RV-4 with a smaller wing and more power. The model is beautiful, great-flying, and well-built. BH Models has done an outstanding job recreating this spectacular aircraft in 1/4 scale!

Inside, you'll find superior construction. From lightweight laser-cut interlocking parts that are factory-built straight and true, to fiberglass parts that fit flawlessly, BH Models has made the Harmon Rocket strong and lightweight. The horizontal stabilizer and wing are bolt-on with an aluminum tube joiner. The hardware is custom to BH. The horns bolt on with ease and precision, and the unique clevis system makes installation quick and the result solid.

We flew our first sample with a 1.40 gas engine. It was unbelievable and, simply put, overpowered. It provides scale speeds at under half throttle and unlimited vertical performance. We recommend a 20cc (1.20ci) gas engine or glow four-stroke for scale speed with good climb and aerobatic performance. If you do over-power the aircraft, throttle and speed management will be required.

For servos, we recommend metal-geared high-torque servos. The Airtronics 94851 servo is great for ailerons, flaps, elevator, and rudder. For throttle control, a quality standard servo such as the Airtronics 94722 BB Digital is the perfect choice.

Unique, Simple, Exciting. The Harmon Rocket is truly a Rocket of a scale sport aircraft and with it' 65" wingspan, it is quarter-scale!

Model Specifications:

• Wing Span: 65 Inch - 1660mm

• Length: 62 Inch - 1570mm

• Weight: 11 pounds - 4.8kg

• Power: 1.20 ci - 20cc gas/glow

• Functions: Ailerons, Elevator, Rudder, Throttle, Flaps

Servos Required:

• 2 for Ailerons

• 2 for Flaps

• 1 each for Elevator, Rudder, Throttle (and possibly choke or cutoff according to the engine)

• Metal-Gear High-Torque servos recommended for control surfaces.


• Realistic Painted Pilot

• Hinges are tongue/groove/pin type

• Custom hardware

• Fiberglass Cowl

• Fiberglass Wheel Pants

• Heavy Duty Gear

• Advanced Wood Contruction

• Lightweight

• Covered with Oracover (Premium Iron-On Covering)

• Large Removable top-hatch is with easy access

• Bolt-on Tail

Additional Information

SKU 159600
Manufacturer BH
Mfr Part Number BH100
Video No

Customer Reviews

Inital Review Review by BigD
Just got started and find this ARF will l take time to do right. First manual does not give dimensions for the cowl front edge to engine mounting (firewall). Looking at model and the manual the cowl seats against the landing gear. My calculation is 5 7/8". so at least 6" propeller hub to firewall is required. The control linkage for the elevator requires bending to properly align with control horn. When formed they are now too short. Rudder linkage is too long to properly fit the servo location. Engine ignition mounting box will not fit hole provided in firewall. All hinging are in place and secure. Both elevator and rudder have free play, not excessive just noticeable. Model finish is very nice and appears strong and light. I will install a strong running DLE20 and likely mount full inverted rather than at a 45 degree angle.
I will follow up with flight report. (Posted on 4/11/14)
Initial review upon staring assembly - more to follow Review by BigO
The Harmon Rocket is a large scale model of a very small airplane. The full-scale Harmon Rocket II is a clipped wing, hopped up version of the popular two-place RV-4 homebuilt, and has a wing span of only 21 ft. The Vietnamese BH Models quarter-scale ARF is a beautiful rendition of the Rocket II, with only a 65 inch wing span and a wing area of only 890 sq. in. With the predicted weight of 11 lbs., it would have a wing loading of a respectable 30 oz./sq. ft. This would make it a relatively "hot" flyer, but it does have rather large landing flaps. I am a bit apprehensive about flying this plane, my usual airplanes being Cubs, the Ercoupe, etc. with rather low wing loadings.
The BH model is covered with Oracover, beautifully applied with not one wrinkle. The cockpit area is fully finished, with two seats, a realistic pilot and an instrument panel, inside a large, already-installed canopy. Excellent pre-painted fiberglass wheel pants and a big gorgeous painted and pre-trimmed cowling are provided. The hardware package is quite complete, including light weight wheels, a heavy duty plastic spinner with aluminum back plate, push rods, control horns and clevises, and a formed and painted heavy aluminum landing gear. Most fasteners needed are furnished. Even a safety prop nut is included.
Construction of the Rocket is similar to what I have seen in many of the IMAC and Pattern ARF's, with lots of interlocking laser-cut light ply parts, well-perforated with lightening holes. The removable wings and horizontal stabilizers are mounted on strong aluminum tubes that pass through the fuselage, and are held in place by bolts. The vertical fin is an integrated part of the fuselage. All control surfaces are pre-hinged and installed, with scale-type invisible hinges. Little or no glue is needed to assemble the model. The packaging was excellent, with each major subassembly in its own box within the big shipping box, and small parts in individual plastic bags.
The model Rocket is designed for a 20 cc gas engine. I do not own such an engine, but I am considering some engines that I do possess. .
I have two big Saito 4-strokers, a 150 and a 125. The 150 is in a big Ultra Stick and the 125 is in a BH Spacewalker.
Now 20 cc equals 1.22 cubic inches., so the two Saito 4-strokers would work, with the 150 "stump puller" being perhaps a bit much for that small wing area. Both would fit the motor mount and cowling of the Rocket. The Saito 125 is lighter, and is said to have more power than a 120. So the Saito 125 seems the best choice for me.
After it has been flown, I will put another review here. I am very satisfied with the two BH ARF's I have bought so far. In the Harmon Rocket box was their catalog, with what looked like literally hundreds of different models to choose from. Oracover appears to be a superior film covering, easily conforming to wing tips and other compound curved shapes, and any wrinkles were easy to remove with a heat gun. (the Rocket had none, but the Spacewalker had a few.)
(Posted on 12/6/12)

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