looking to build a VTOL
#2

It really depends on exactly what type VTOL you are attempting.
For something like a scale model of the "Pogo" its likely that any 3axis heading hold capable gyro can do the job.
https://www.youtube.com/watch?v=Nh9dhBJY010
For a scale Osprey or Harrier it would be more difficult and need a more complex gyro system for best result. (even though an Osprey has been done with no gyro, but it couldn't transition back to hover for landing reliably.)
For something like a scale model of the "Pogo" its likely that any 3axis heading hold capable gyro can do the job.
https://www.youtube.com/watch?v=Nh9dhBJY010
For a scale Osprey or Harrier it would be more difficult and need a more complex gyro system for best result. (even though an Osprey has been done with no gyro, but it couldn't transition back to hover for landing reliably.)
#4
New Member
Join Date: Feb 2018
Location: Australia
Posts: 12

To resurrect an old thread , about 20 years ago I made a XFV-1 and I believe probably made the first ever fixed wing Vertical take off , in Australia at least.
Now Ive just got back in the hobby after a 15 year break and its all Electric for me now.
I believe I can make this work with a 3-axis stability module , (never existed back in the day)
So thats my next project . I believe I will be able to make a controlled take off with Electric & 15x4 3D prop and a controlled landing too. Hoping ailerons will take care of torque and not bother with the complication of a contra rotating prop.
you can see my previous efforts were impressive but not very well controlled ,
https://youtu.be/nRQ6LW7VSD4
Now Ive just got back in the hobby after a 15 year break and its all Electric for me now.
I believe I can make this work with a 3-axis stability module , (never existed back in the day)
So thats my next project . I believe I will be able to make a controlled take off with Electric & 15x4 3D prop and a controlled landing too. Hoping ailerons will take care of torque and not bother with the complication of a contra rotating prop.
you can see my previous efforts were impressive but not very well controlled ,
https://youtu.be/nRQ6LW7VSD4
Last edited by Don Sims; 02-27-2018 at 10:20 AM.
#6

goingbush
You should remeber that a drone board controls the lift motors (ie the thrust) directly for an almost instant response in both roll, pitch and yaw.
All hover capable planes use this sort of system.
The issue is will a successful 'hover' stability system handle the transition to horizontal flight. Drones get over this problem by not actually "flying".
If your VTOL relies solely on the effect of aerodynamic forces on control surfaces should handle the transition well enough but to be able to hover things get much harder.
With enough power and light weight even an EDF can ROG vertically.
https://www.youtube.com/watch?v=OMXVyAwNMTc&t=47s
Only aerodynamic control surfaces. It does have a plane 'stabiliser' rx although it does flies well enough with it turned off.
Any thoughts on what you intend to build?
You should remeber that a drone board controls the lift motors (ie the thrust) directly for an almost instant response in both roll, pitch and yaw.
All hover capable planes use this sort of system.
The issue is will a successful 'hover' stability system handle the transition to horizontal flight. Drones get over this problem by not actually "flying".
If your VTOL relies solely on the effect of aerodynamic forces on control surfaces should handle the transition well enough but to be able to hover things get much harder.
With enough power and light weight even an EDF can ROG vertically.
https://www.youtube.com/watch?v=OMXVyAwNMTc&t=47s
Only aerodynamic control surfaces. It does have a plane 'stabiliser' rx although it does flies well enough with it turned off.
Any thoughts on what you intend to build?
Last edited by quorneng; 02-27-2018 at 03:20 PM.
#7
New Member
Join Date: Feb 2018
Location: Australia
Posts: 12


#8
New Member
Join Date: Feb 2018
Location: Australia
Posts: 12

goingbush
You should remeber that a drone board controls the lift motors (ie the thrust) directly for an almost instant response in both roll, pitch and yaw.
All hover capable planes use this sort of system.
The issue is will a successful 'hover' stability system handle the transition to horizontal flight. Drones get over this problem by not actually "flying".
If your VTOL relies solely on the effect of aerodynamic forces on control surfaces should handle the transition well enough but to be able to hover things get much harder.
With enough power and light weight even an EDF can ROG vertically.
https://www.youtube.com/watch?v=OMXVyAwNMTc&t=47s
Only aerodynamic control surfaces. It does have a plane 'stabiliser' rx although it does flies well enough with it turned off.
Any thoughts on what you intend to build?
You should remeber that a drone board controls the lift motors (ie the thrust) directly for an almost instant response in both roll, pitch and yaw.
All hover capable planes use this sort of system.
The issue is will a successful 'hover' stability system handle the transition to horizontal flight. Drones get over this problem by not actually "flying".
If your VTOL relies solely on the effect of aerodynamic forces on control surfaces should handle the transition well enough but to be able to hover things get much harder.
With enough power and light weight even an EDF can ROG vertically.
https://www.youtube.com/watch?v=OMXVyAwNMTc&t=47s
Only aerodynamic control surfaces. It does have a plane 'stabiliser' rx although it does flies well enough with it turned off.
Any thoughts on what you intend to build?
I want to revisit the XFV-1 to get me in the right direction, Then I'll have another attempt at vectored thrust , Something else I failed on back when.
https://youtu.be/n-LRNw4wPKI
obviuosly will be all electric.
#10
New Member
Join Date: Mar 2018
Location: new york
Posts: 7

i find these units are usually very heavy and weigh the plane down making it way to tail heavy and requiring a heavy battery to the nose
#11

Harrier and F-35
More videos on their devopment channel
www.youtube.com/user/melanie1289/videos
3D printing
More videos on their devopment channel
www.youtube.com/user/melanie1289/videos
3D printing