RCU Review: Kangke Rearwin Speedster


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    Contributed by: Fly RC Magazine | Published: February 2005 | Views: 28994 | email icon Email this Article | PDFpdf icon

    This review appears courtesy of Fly RC Magazine.

    Article by: Vic Olivett



    The Super Kraft Rearwin Speedster from Kangke is the perfect model for someone looking to step up to giant scale flying. The symmetrical airfoil and moderate wing loading provide excellent flight characteristics that are well within the capabilities of most sport pilots. The Speedster’s aerobatic capabilities and classic appearance will also appeal to the seasoned giant scale pilot.



    Kangke Super Kraft
    Rearwin Speedster

    Like many aviation buffs, I am very interested in Golden Age era aircraft. During that period, the design of aircraft changed dramatically. Gone was the boxy look of the old biplanes. Speed, reliability and comfort was the order of the day. One of the beauties from that era was the Rearwin Speedster.

    Founded by Raymond Rearwin in 1928, the Rearwin Airplane Company designed and built over 400 aircraft before closing its doors in 1946. The model 6000M Speedster was powered by an inline inverted Menasco 125 horsepower engine. The Rearwin Speedster was truly a work of art for its day and remains very popular among modelers.

    Kangke Super Kraft has done an excellent job of capturing the beauty and appeal of the original in their model of the Rearwin Speedster.


    Plane: Rearwin Speedster
    Manufacturer: Kangke Super Kraft
    Type: Standoff Scale ARF
    For: Experienced Pilots
    Wingspan: 96 in.
    Wing Area: 1440 sq. in.
    Weight: 270 oz.
    Wing loading: 27 oz./sq. ft.
    Length: 70 in.
    Radio: 4 channels required; flown with JR XP 652 transmitter, JR R600 receiver, 6 servos: Hitec HS-425BB (throttle) and Hobbico C-70s (2 aileron, 2 elevator, 1 rudder and 1 throttle)
    Engine range: 1.8 to 2.4 gas or glow. Engine used: US 41cc with spring start
    Propeller/Spinner: Zinger 18x8, Midwest 2 ¾
    top rpm: 6,820
    Fuel: 40:1 gas & oil mixture
    Onboard battery: Sanyo 1000mAh 6-volt 5-cell pack
    Price: $447.77

    IN THE WORKSHOP

    The plane is shipped in two boxes: one for the wings, stab and fin, and the other contains the fuse and the rest of the parts. Upon first inspection, you can’t help but notice the quality workmanship and the excellent finish on the Speedster. All of the parts are individually wrapped in plastic to protect the UltraCote finish. The hardware package is good quality and complete with just about everything you will need. All of the flying surfaces are pre-hinged and a few drops of PK Industries thin CA will make for a good strong hinge system.

    The rear of the fuse contains two pockets, one for each elevator servo. This design allows for a perfectly straight run from the servo to the control horn. It is little details like this that impress me. It shows that the designer has taken the time to think things through. If you do not have a computer radio, you’ll need a servo reverser for one side. Take some extra time to make sure that the massive tail section is epoxied in straight and securely. I used PK Industries 30-minute epoxy. Super Kraft’s design has two brass pins to help align and strengthen the rudderpost on the rear of the vertical fin. This is a big help during assembly.
    The cabin area of the Speedster is massive, and it seems to swallow up your airborne pack. The windows and windscreen are pre-formed and require just a little trim for a perfect fit; and they do look good when finished. I decided to add just a little personal touch by using no. 4 button head screws around the windscreen.

    The fuselage has two access hatches. A rather large one on the bottom, which also gives you access to the landing gear mount, makes it easy to install your electronic equipment. The hatch on the top of the fuse is used to access the wing bolts, fuel tank and the top inside of the cabin. I have to tell you that the further along you get on this project the more you appreciate the design of this model.
    The front end of the Super Kraft Speedster is very rugged. The firewall is epoxied using triangular bracing stock and then glassed. Mounting the US 41 was a simple task. I had to add three-inch extensions to the stock muffler to exit the exhaust and cut a hole in the side of the cowl for the carburetor. The entire engine installation was rather easy.

    I was pleasantly surprised to see the well-designed and neat installation of the wing struts. They are adjustable, strong and look great.


    Airborne
    With the US 41 engine running well after a short break-in, we were ready to go. The Speedster handles great on the ground and the tail wheel steering is very positive. A few hot runs down the runway and I felt that the Rearwin Speedster had plenty of power. With a final check of the controls, it was time to go.

    Takeoff- With the nose of the Speedster pointed into the wind, it quickly picks up speed as you bring the throttle up. The first thing you notice is that big tail coming up. Then, with just a little touch of up, the Speedster is airborne. The climb out is smooth, clean and straight. After the first turn and downwind leg, I reduced the power to about seventy percent. No trim was needed to keep the Speedster straight and level.

    The Kangke Speedster is very stable and smooth in flight. All of the controls are very responsive for a big high-wing plane. At full throttle, the Speedster is surprisingly fast. There are no bad habits when you enter a turn: the plane cruises through the turn like it is on rails. When I reduced the power to check the stall characteristics, the Speedster slowed down nicely. The stall is straightforward and easy to recover.

    Aerobatics- I have to say I was surprised to see how well the Kangke Rearwin Speedster maneuvered through aerobatics. Because of the symmetrical airfoil, rolling the Speedster requires very little down elevator while inverted and little altitude is lost during the roll. Loops were very clean and exiting the loop at about the same point as the entry was no problem. I then climbed to get a little more altitude and flipped the Speedster on its back. It handled very nicely inverted. Most hi-wingers are not that good at flying inverted, but the Speedster’s wing is fully symmetrical. This is just a little change from true scale that the designers have included to make it fly better.

    Landing- I have to tell you that this plane looks great on final. It looks so real in the air. As it starts to settles in, all that is needed is a little power to slow the descent. With the big 96-inch wing, it is very stable and touchdown is as real as it gets. The roll out is straight and rather short. I think that anyone who has ever landed a RC model before can land this beauty.


    Kangke’s Super Kraft Rearwin Speedster is one of the finest models that I have done in the past few years. I average ten to fifteen planes per year. If you look inside the fuse and wing, you will appreciate the meticulous construction of this kit. The high quality, excellent design and the above average finish make the Rearwin Speedster truly beautiful model.


    If you are looking to step up to a giant scale gas model for the first time, this one will make you look like a pro. Bring this one out to the field, and the crowd will gather quickly. Nice job, Kangke.


    This article appears courtesy of Fly RC..
    Fly RC Magazine is published by Maplegate Media.


    Click here for more sample articles from
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    JR
    distributed exclusively by Horizon Hobby Distributors
    www.jrradios.com
    (877) 504-0233

    Kangke Industrial USA Inc.
    www.kangkeusa.com
    (877)203-2377
    (631) 274-3058

    Midwest Model Products
    www.midwestproducts.com
    (800) 348-3497

    PK Industries
    www.pkindustries.net
    (866) 203-4063

    US Engines
    www.us-engines.com
    (717) 343-1529

    Zinger Propellers
    www.zingerpropeller.com
    (310) 539-2313

    Comments on RCU Review: Kangke Rearwin Speedster

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    The comments, observations and conclusions made in this review are solely with respect to the particular item the editor reviewed and may not apply generally to similar products by the manufacturer. We cannot be responsible for any manufacturer defects in workmanship or other deficiencies in products like the one featured in the review.

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