Care to make a 3D dwg for me? I can't see how it would work with

counter

rotating
rotors?

Paul Lamar

Paul,
How are you going to get in and out of this VTOL?
George ( down under)


A step ladder.

--
Paul Lamar ...No rotor no motor.


Small low-drag hand holds and foot depressions built into the fuselage.

I'm trying to locate a small planetary to build a 1/5 RC scale model -
any ideas?

Perry

Piston or electric? https://sdp-si.com/eStore/ Key words internal gears.
http://bostongear.com/products/enclosed/gearhead.html

"Due to the load sharing attributes of multiple tooth contacts, planetary
gearboxes provide the highest torque and stiffness for any given envelope.
Balanced planetary kinematics at high speeds combined with the associated
load sharing make planetary-type gearheads ideal for servo applications."

"True helical technology provides increased tooth to tooth contact ratio by
33% vs. spur gearing
12$B!k(J helix angle produces smooth and quiet operation
One piece planet carrier and output shaft design reduces backlash
Single step machining process
Assures 100% concentricity
Increases tortional rigidity"


Sounds like Ford C6 planetary gears :)


Paul Lamar ...No rotor no motor.

Paul

George has an ummm ....good point.  Bring along your climbing gear? Don't
drop your checklist or crackers:)

I think you where on to something good in the beginning when you had the
rotor and engine tilt up together. That has its challenges still though it
makes egress more salient if the pilots don't move. Perhaps a side by side
center slotted or double canopy design with the pilots near the front. The
rotor and engine could be connected as a unit with the pivot point on the
CG. The rotor column pivots down through the canopy and is streamlined for
forward flight and pivots up for T.O and landing.  I guess that means the
engine might protrude a bit from the belly with dual central landing wheels
attached.



Check out Matex gears for the small plastic units. They can be stacked

Doug in Japan

I don't think plastic gears are going to work at the typical model airplane
engine speed of 20,000 RPM. Also we have to tap off the ring gear and the
planet carrier to get counter rotating props. The Boston gear 3:1 unit is
near perfect.

If you lay it out there is no way to get the thrust in line of the single tilting
rotor inline with the CG. That is why the V22 uses two tilt rotors.

Spring loaded kick in door steps in the wing and fuse will work fine. They have them
in all fighter aircraft since WW II. The pilots seat is only about 5 feet off the
ground. This is not an airplane for old men like me and you :)