Discussion in 'Aircraft Design / Aerodynamics / New Technology' started by FritzW, Aug 11, 2016.
They put the motor in the front
Indeed they fly with the engine up,in front, but would you imagine a hefty 115kg 2m Pilot leaving the gravity of earth even just for 1m (3,2’)?
The PeeWee has a few design features that pleases and others that don’t.
What pleases is it light weight, dimensions, and construction.
What I don’t like, biplane and the molehill killer unsuspended Landing gear.
The fuselage seems to be built up out of a bent sheetmetal and riveted together.
Either 6061 T6 or 6082 T6 could be found world wide.
The tailvolume could be bent out of 6061 or 6060 tubing, the later .0125 bigger in diameter to add a bit more strength.
Now, how to integrate the Ranger gear on this one, might be a bit challenging.
The overheadstructure to hold the wings could either be riveted or welded steel.
In fact, the tailvolume and the wings of the Euroflyulm Minifox would match this fuselage perfectly.
For a thin walled single fuselage tube you will need the equivalent of127mm(5”) tube for a taildragger and 100mm(4”) tube for a tricycle UC. 5”x 0.64” 6061t6 tubes are difficult to obtain in lengths greater than 12’ in most places unless you get a special run manufactured - all sizes are available from China but freight is expensive.
A very lightweigh aircraft a smaller size may be possible. The lack of suitable fuse tubes ended the Boorabee construction here in Australia.
A single tube certainly simplifies construction, the tube can be crushed at the ends and riveted to the rudder post at the rear and the pegs for rudder peddles at the front.
I attach a plan for the main bulkhead of the Boorabee.
I’d still love le to go with the enhanced monotube structure, what would the minimal wall thickness be by using a 6060 alloy and 50mm outer diameter 2”
And what about 2” 6061 T6 or 6082 T6?
.081 or .125?
I wonder what it cost to have a special size drawn?!
further Im looking for a sturdy ultralight wing construction, that is fast to assemble based on tubing, where off the nose tube do not equal the L/E.
Further, the wing should be high lift and no highspeed Damon.
Ultralight wing info.
http://ijesrt.com/issues pdf file/Archive-2017/April-2017/121.pdf
Here's the start of the Erkki Monotube. Nose wheels are tools of the devil but with the tail this high I'm afraid it might need one. ...we'll blow up that bridge when we get here.
Cub style rudder otta look good if the wings are the right shape.
The gussets are .020, they would be easy enough with tin snips or CNC
I'm trying to keep all the flanges small enough to be bent with a hand seamer/flanger
Flat pattern could be just a PDF for the CNC impaired (flanged lightening holes are optional but would add a lot of stiffness, might just put flanges on the free edges)
...only a jillion gussets left to draw
These work pretty well too. Often faster than the other kind.
long fishing pole tail skid, no wheel
We had one of those on the "free stuff" table at the hangar for a long time. I didn't know what it was so I didn't grab it, now I wish I had <face palm>
Rotax618, on your Boorabee did you ever consider going to a built up beam?
ain't nothing here a Boorabee...
I thought about a built up beam back on the flying motorcycle thread when I got stuck on the Kirk Peewee.
Nose wheel, if it’s big enough, it could be one of the two variants
for the tailwheel a diagonal tube to the motormount would be right
Where and how would the upper and lower beam be joined
May as well buy a set of Demoichelle or Cubchelle plans to supplement this build. Also looks like the shock mount would be in the way of the pilots feet for rudder pedals. You could go the superstol route and move the shock to the upper member and have huge travel as a bonus.
An a wing structure like this one.
The idea, is to have the same shockabsorber position like on the Ranger, therefor the diagonal tubing is required to go from below the seat to the engine mount.
Separate names with a comma.