Bill of Materials
Note: all wood is ¹⁄₈″ balsa unless other- wise indicated on plan
6 sheets 4″ × 36″ × ¹⁄₈″ balsa* 1 sheet of 4″ × 36″ × ¹⁄₄″ balsa*
1 sheet 3″ × 8″ × ¹⁄₈″ lite ply for formers, ribs, etc.*
38 feet of ¹⁄₈″ square balsa sticks for stringers and turbulators
7 feet of ¹⁄₈″ × ¹⁄₄″ balsa sticks for tail ribs
7 feet of ¹⁄₂″ × ¹⁄₁₆″ balsa for spar caps
3 sheets of 3″ × 36″ × ¹⁄₃₂″ balsa sheet for fuselage and wing sheeting
3 feet of ¹⁄₄″ × ³⁄₄″ balsa for landing gear fairings
4″ × 24″ × ¹⁄₈″ and 4″ × 18″ × ¹⁄₄″ balsa for wheel pants
4″ × 12″ × ¹⁄₁₆″ balsa sheet for wing saddle
¹⁄₁₆″ × ¹⁄₂″ × 12″ basswood for servo rails
4″ × ³⁄₈″ square balsa for wing rigging blocks
2¹⁄₂″ × ¹⁄₂″ square hard balsa or bass- wood for wing mount block
2 pieces, ³⁄₄″ × 1″ × 3¹⁄₂″ soft balsa block for tail fin fairings
6″ × 1¹⁄₂″ × 2¹⁄₂″ balsa block for cowling*
3″ × 3″ × ¹⁄₁₆″ ply for bellcrank plates, wheel pant mounts, wing lamination
1 piece of ³⁄₈″ square × 4¹⁄₂″ long bass- wood for motor mount
2 pieces of ¹⁄₈″ dowel, 3″ long for wing mount
39″ of .094″ music wire for landing gear and elevator joiner
48″ of .037″ music wire for pushrods 4″ of .062″ music wire for tail skid
2 pieces of ¹⁄₈″ brass tubing 2¹⁄₄″ long for landing gear mounts
small sheet of clear acetate, styrene or similar for windshield
silver elastic thread for rigging wire covering and marking materials
Hardware 2 DuBro micro bellcranks for ailerons hinges pushrod material hook & loop fasteners for battery mount 10–32 nylon screw for wing mount 4 med-small control horns
10 x #2 screws for landing gear and wheel pants
2¹⁄₄″ wheels e.g. Williams Bros #14000 4 × ³⁄₃₂ wheel collars
¹⁄₆ scale pilot figure e.g. Williams Bros #17600
*Note: laser-cut wood set, vac-formed cowl, and decal patterns are available from the author. See At A Glance.
FLYING MODELS
The completed Howard DGA-5 looks the part of a famous 1930’s air racer yet behaves much like a typical sport model and is capable of all typical sport aerobatic patterns.
forward. This way you can easily slide the battery back into position and then stick the forward stop onto the tray. Blocking the bat- tery in this way also allows plenty of cooling air to flow around the battery and over the ESC. Set the control throws as follows for the
initial flights. You can change them later as desired: elevator +/- ¾ inch, rudder +/- 1½ inches, ailerons +/- ¾. My model needed no rudder trim, a little
“up” trim on the elevator, and I set up both ailerons about ¹⁄₁₆ inch above neutral, just to get a little washout effect. I found a mild amount of rudder mixed into the ailerons helps smooth the turns, although you might not want this if you are flying a racing py- lon circuit where a little adverse yaw helps to keep the nose up in those knife-edge turns. The Ike has a simple tail skid so ground handling in grass is not going to be terrific. If you have a paved or hard-packed runway you will have no trouble turning and taxi- ing but if you are on healthy grass be pre- pared to walk. The main wheels are a little
larger than scale but really work well on all surfaces. I’m still surprised at the smooth rollout I get on some of the rough grass fields I fly on. Even with those large wheel pants I haven’t had a tip-over landing on grass, yet. The model’s design weight of 22–25
ounces makes for a fairly light wing loading so takeoff is quickly and easily accom- plished at about three-quarter throttle. With the power system I have the Ike will cruise around all day at half throttle. While it doesn’t look very realistic as a racer doing this, it’s nice to know it will do it quite hap- pily for those occasions when you are mak- ing nice slow “banana” passes for your friend’s camera. The Ike seems to like a little power on for landing. Maybe it’s the drag from the flying wires. Keep the throttle a few clicks above “idle” and the Ike will do pretty 2-point or 3-point landings. Because of its light wing loading, stalls are a non-issue. Practice up high to see how your model behaves. Over- all, she flies like a nice sport plane and is capable of all conventional aerobatics.
Reference Links with Photographs and History
http://www.airminded.net/dga3/dga4.html
http://www.airbornemedia.com/store/collection/dga-5(nr56y)/
index.htm
http://www.airliners.net/photo/Howard-DGA-5/0625649/ http://www.airport-data.com/aircraft/photo/568917.html
http://www.airracinghistory.freeola.com/aircraft/Howard%20DGA-4%20DGA-5.htm http://www.centennialofflight.gov/essay/GENERAL_AVIATION/howard/GA5.htm http://www.fiddlersgreen.net/models/aircraft/Howard-Ike-Mike.html http://www.flickr.com/photos/46349773@N08/5564471587/
http://goldenageofaviation.org/racewinners.htm http://rides.webshots.com/photo/2122679000060740599lwbNFW http://www.windcanyonbooks.com/product_info.php?products_id=1164
Another, larger Ikemodel by Jeanskydive of RCGroups:
http://www.rcgroups.com/forums/showthread.php?t=1009620 http://www.youtube.com/watch?v=qCrgLlWZtXE http://www.youtube.com/watch?v=3cm6M7I_78E
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