logo  
 
About | Contact |Postage |Payment Options | Newsletter| Terms and Conditions| Research
 

DeltaWingV2

stage01
With this delta wing we experimented with a formed and Depron covered airfoil to give very nice slow speed flight. The linear servos were a perfect choice for the elevator aileron mixing and these larger 1.7 grams linear models gave adequate throw. All up a very impressive plane. While not being overly powerful at all, we achieved some nice slow speed flight.

Specs
  Receiver: Plantraco     Flying Weight: 29 g
  Airframe: Depron     Airframe Weight: 20.6g
  Motor: 8mm Geared     Wingspan: 34cm
Propeller: GWS 4040     Length: 30cm
         
         
       

 

stage01

Starting from a single sheet and marking everything out.
iamge 01


The airfoil sections for the ribs have been printed and cut out to be pinned onto the Depron foam. 6mm Depron was used for the ribs.

iamge 01


Sanding the ribs together to ensure the are the same shape.
iamge 01


The bottom surface is pinned flat to a board while the ribs are glued into place.
iamge 01


Pinned down for gluing
iamge 01


A section has been cut from the wing to accommodate the prop with adequate clearance.
iamge 01


Forming the top surface of the wing is done with hot water which allows the Depron to bend and hold it’s shape allowing it to then be bent over the frame easily.
iamge 01


The frame also has flanges bent down to allow for smooth airflow around the cutouts for the prop.
iamge 01


All pinned and glued in place.
iamge 01


The fins have been cut from 3nn grey Depron for a nice effect.
iamge 01


Wingtip glued in place

 

 

iamge 01


The body mainly finished
iamge 01


Fin and other surfaces in place
iamge 01


For this project we used the larger 1.7 gram linear servos which have more throw than the micro ones. This was to allow enough control surface throw even when using elevron mixing.
iamge 01


The all up weight of the completed airframe was 20.66 grams. A bit heavy for a small park flyer but we wanted to get a good airfoil with upper and lower surfaces.
iamge 01


Laying out and positioning all the RC gear to get the CG correct.

iamge 01


Mounting of the motor. This is an 8mm brushed motor with a 5 to 1 reduction gearbox.

 

iamge 01


The motor and GWC 4040 prop
iamge 01


All gear mounted and glud in place. of particular interest if that we used UHU Por Glue to secure the linear servos. This gave ample holding strength and also made it easy to eventually remove the servos for the next project.

 

iamge 01


Using two pieces of Depron foam and mini pegs to hold the control surface straight while we attached and adjusted the pushrods.
iamge 01


Control linkage components being held in place so they can be marked and cut. The two pieces are held together with 1mm heat shrink. This is easy to apply and can also be removed if needed. Just remember to put a sheet of alfoil under the pushrod to protect the Depron from melting as you heat shrink the control rods.
iamge 01


For push rods we used 0.35mm piano wire fed through 1mm OD aluminum tube.

 

iamge 01


The completed setup. A third linear servo was also added later to give separate elevator and aileron control. The Plantraco receiver was also replaced with a DelTang DTRx35

 

iamge 01


This skid underneath is to protect the airframe on landing as well as the prop.
iamge 01


A cowl was formed from 1mm depron – once again heated and in this case bent around a wine bottle which happened to be exactly the right diameter we were looking for.
iamge 01


Ready to fly
iamge 01


Side view  
iamge 01


A short video showing the plane from different angles. Unfortunately we don’t have a video if this plane flying.

Reflection:

A very nice slow plane to fly due to the low wing loading and the fact that we put effort into making a delta wing plane with an actual airfoil. While not a fast plane this little park flyer gets around well at full throttle. Weight was a bit on the heavy side due to all the Depron which went into making the airfoil body, so sports performance is definitely not this plane’s strong point. Also, a high CG meant that gentle turns were much easier to control than steep ones. In conclusion a very nice and gentle plane to fly.