Dalotel
DM-165
By Chuck Felton
AT A GLANCE Type:
Construction:
A one off French design makes for a perfect sport scale entry into the flying circle!
PHOTOGRAPHY: CHUCK FELTON T 44
he Dalotel DM-165 is a French two- seat training monoplane designed by Michel Dalotel. A number of variants were proposed but only
the prototype was built. The DM-165 was a tandem two-seat low-wing monoplane. Pow- ered by a 165 hp (121 kW) Continental IO- 346A flat-four piston engine it had a tail- wheel and retractable landing gear. Dalotel was assisted by Société Poulet in
the construction of the prototype, registered F-PPZE, which was first flown in April 1969. The aircraft was successfully tested during 1970 but despite efforts to market the air- craft none were ordered. The aircraft has of- ten been modeled in the past as an R/C Pat- tern model. The control line Dalotel DM-165 model presented here is simple in construction and inexpensive as it uses 1⁄8-inch corrugated cardboard as the primary building material, which greatly reduces both building time
and cost. The design makes use of card- board’s unique features in that it can be used in large sections and folded. For instance, each wing panel is built of a
single piece of cardboard scored and folded at the leading edge with cardboard ribs and a single spar. The tail surfaces and fuselage are primarily cardboard with little internal bracing required. The result is a low cost, fast building model that has good scale like appearance and can take plenty of punish- ment at the flying field. Cardboard varies in weight, but any 1⁄8-
inch corrugated cardboard will do. Sources of this material include box manufacturers and local shopping centers where you can find stacks of discarded boxes. Look for cardboard with brown paper on one side and a white finished Kraft paper on the other side. The white paper on the outside of the model results in a smoother finish and neater appearance. The method of fold-
Wing span: Wing area: Length: Weight:
Wing loading:
Engine required: Prop:
C/L sport scale
cardboard with some balsa and ply 60 inches 602 sq. in. 49 inches 78 ounces
18.6 oz./sq.ft.
.40–.50 two-stroke 9–6
ing the cardboard and the use of gummed paper tape to seal the joints and exposed corrugations is explained in the construc- tion hints. The model has a wingspan of 60 inches
and a length of 49 inches. The bottom of the airfoil is flat with a curved upper surface, due to the scoring and folding technique em- ployed. Engines of .40 to .50 size can be used. My model is powered by a .40 engine and has a fully fueled flying weight of 78 ounces. This weight combined with the 602 square inch wing area results in a wing loading of 18.6 ounces/square foot.
SEPTEMBER 2012
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