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Kirt Blattenberger, Webmaster - Airplanes and Rockets

Kirt Blattenberger

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Even during the busiest times of my life I have endeavored to maintain some form of model building activity. This site has been created to help me chronicle my journey through a lifelong involvement in model aviation, which all began in Mayo, MD ...

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Model Aviation Magazine, AMA - Airplanes and Rockets

Roland D-2 "Wahlfisch" Control Line Model
September 1949 Air Trails

September 1949 Air Trails
September 1949 Air Trails Cover - Airplanes and RocketsTable of Contents

These pages from vintage modeling magazines like Flying Aces, Air Trails, American Modeler, American Aircraft Modeler, Young Men, Flying Models, Model Airplane News, R/C Modeler, captured the era. All copyrights acknowledged.

Not a lot of information is available about the Roland D-2 "Wahlfisch" (Whale) on the WWW (World Wide Web). Wikipedia has a entry for the C-II Wahlfisch, but nothing on the D-II. The C-II was also a biplane, but its wing configuration had a lower and a shoulder location on the fuselage, whereas this D-II has a lower wing and a high wing mounted on a centrally located solid pylon. It seems that would be a real annoyance to the pilot with an obstruction that hinders stereoscopic vision when looking straight ahead. The dual, wood stick cabane strut arrangement must have been a lot better, although more difficult to construct. The plans are nicely done by the author, D.A. Newell, but I do not see a rib pattern.

See also World War-1 Ace von Schleich and His Roland C-II "Wahlfisch" in the  September 1962 American Modeler.

Just what the doctor ordered! U-control bipe with pylon.

By D. A. Newell

The Black Knight, of Germany," Hauptman Ritter E. von Schleich, leader of the "Bavarian Blue Tails," attained many of his thirty-five victories using the Roland D-2. Because of its streamlined shape, this plane was nicknamed "The Whale" (Wahlfisch), and many pilots painted a mouth and eyes on the nose to simulate a whale. Although used in action with success for quite some time, the "Whale" somehow never achieved the popularity of the Fokker and Albatros fighters. Unlike the average bullet-nosed planes with liquid-cooled engines, the D-2 did not have a radiator protruding into the air-stream. Instead the radiator was cleverly concealed in the nose just behind the spinner, with inlet and outlet. slot as the plans indicate.

Of all the biplanes used in World War I the Roland D-2 is one of the best adapted to control-line use because of its exceptional streamlining  and sturdy construction. The latter is due to the fact that the usual cabane struts are replaced by a husky streamlined pylon - which, incidentally, hindered the pilot's forward vision. No dihedral was used, which makes the wings very easy to build, even with the slight amount of sweepback. The model is easy to fly and should bring back to mind the 1917-18 period when flying man machines were assemblies of wood, wire, and fabric.

The fuselage is built up and planked for three reasons: lightness, economy and rapid construction. This type has all these advantages over the hollowed balsa block fuselage. A crutch made from 1/4" x 1/2"serves as a jig, engine mount and backbone. This is built first and the bellcrank attached securely. Cut out the tail surfaces and trim and sandpaper to shape. Add the fabric hinges and cement the stabilizer to the crutch. Cut out the bulkheads and cement them in place on the crutch. Attach the gas tank and bolt the landing gear in place to the plywood bulkhead. Hook up the control push rod and then cover the whole body with 1/16" thick balsa. Strips of about 3/8" wide are good for this purpose. Make sure the strips are cemented to each other as well as to the bulkheads. Sandpaper the body until smooth and then cover it with very fine silk. This makes. it almost indestructible. Dope it twice and sandpaper smooth. Cut the pylon and cement it in place. Fillet pylon with Aero Gloss plastic balsa. Cut out the cockpit and engine recess, and add vertical tail and strut.

When you make the top wing, extend the right wing leading edge straight through past the center line, as the plans show. This will make a very strong wing. The bottom wing is made in two pieces. Only the root is shown in the plan because the rest is the same as the top wing. A small balsa block is used to fair the wing into the fuselage. Both wings are covered with fine silk. Dope well.

The top wing is cemented in place first. Plenty of cement must be used when doing this. When this is thoroughly dry, the wing struts can be cemented in place. These should be sharpened and pushed into the wing ribs as shown on the plans. Lay the plane on its back and cement the bottom wing panels in place, inserting the struts in the ribs. Carve the spinner from soft balsa and cement to the propeller, cutting away for the propeller nut and washer.

Once the model has been clear doped three or four times, it is ready to paint. Using Aero Gloss dope the entire model was painted pale yellow three times. The mouth and eyes are black. The upper surface of the top wing is covered with splotches of green and purple. The horizontal tail surfaces and top side of the body are colored in the same manner. All struts are either dark green or purple, and all crosses are black. Of course you can paint the plane any color you wish but be sure to use a paint that is impervious to hot glow plug fuels. It is a good idea to use fuel-proof cement as well. Fine music wire is used for the rigging. This is not necessary but adds quite a bit to the appearance of the model. Machine guns can be made from a hair curler.

The model flies at about 65 mph. I used 50-foot lines for flying, the size of which should be at least .010 in dia. A line guide made of wire or plywood should be cemented to the inboard wing strut. Balance the model 1/4 in forward of the pivot point. Do not fly if the model is tail-heavy or a crack-up will occur. Add lead weight in the tail or nose to balance the model. Be sure to offset the rudder to turn the model away, from the center of the circle. This will keep the lines taut."

 

Roland D-2 Wahlfisch Plans - Airplanes and Rockets

Full size drawings of the D-2 are found on Air Trails Full Size Plan #949.

 

 

Posted December 11, 2021

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