volocopter

Things that fly
Post Reply
craneplaneguy
10 kW
10 kW
Posts: 582
Joined: Nov 27, 2015 9:15 am
Location: S.E. Idaho USA

volocopter

Post by craneplaneguy » Apr 28, 2017 3:13 pm

Not sure if this has been on here, spotted on my aviation sites I hang out on.

https://backcountrypilot.org/community/ ... pter-20618

I posted the link to the av forum, as it's interesting to see what other pilots think of it.
I can't help but think: OK, you're up at altitude after a power consumptive vert takeoff, and now you transition into cruise.....but you're still beating the air into submission, rather then developing lift like a wing does. This thing, with a small wing to help "hold it up" once at cruising speed, makes sense to me. I'm no rotor wing pilot, maybe all those rotors develop lift with increased airspeed, don't know, but I do know a conventional helicopter takes huge amounts of fuel and power to do what they do.

flat tire
10 kW
10 kW
Posts: 766
Joined: Feb 26, 2014 12:20 am

Re: volocopter

Post by flat tire » Apr 28, 2017 3:42 pm

For rotorcraft the spinning blades themselves act as wings once it starts moving.

A conventional helicopter is a lot more efficient and a lot safer too since you've still got control after a complete engine failure.
Orange DH w/ Cyclone mid on 6kw
Gary Fisher w/ Leaf hub on 6kw
RC Lipo and domino throttles only!

dirkdiggler
10 kW
10 kW
Posts: 730
Joined: Oct 18, 2012 1:31 am

Re: volocopter

Post by dirkdiggler » Apr 28, 2017 6:30 pm


User avatar
Chalo
100 GW
100 GW
Posts: 6170
Joined: Apr 29, 2009 11:29 pm
Location: Austin, Texas

Re: volocopter

Post by Chalo » Apr 28, 2017 7:37 pm

I can't see what advantage this could possibly have over an autogyro (with powered rotor spin-up for takeoff). Sustained hover, I guess? Not much of an advantage in return for the extra complexity.
This is to express my gratitude to Justin of Grin Technologies for his extraordinary measures to save this forum for the benefit of all.

User avatar
liveforphysics
100 GW
100 GW
Posts: 14455
Joined: Oct 29, 2008 1:48 am
Location: Santa Cruz, CA, USA

Re: volocopter

Post by liveforphysics » Apr 28, 2017 9:16 pm

It's pretty awesome for flights under 1hr. Incredible control authority beyond planes or helicopters, and awesome multi-motor/prop failure redundancy.

Also, since the props bolt to the can of the outrunner motor, the only moving parts for service are motor bearings which can be sized to last 10's of thousands of hours of flight time between service, where an airplane or helicopter has a number of moving parts with critical vehicle failure modes to inspect.

Also, a child could be taught to proficiently fly the volocopter in half an hour. Learning to fly a helicopter is considerably more tricky to learn.
Each carcinogen vapor exposure includes a dice roll for cancer.

Each mutagen vapor exposure includes a dice roll for reproductive genetic defects in your children.

Each engine start sprays them into a shared atmosphere which includes beings not offered an opportunity to consent accepting these cancer experiences and defective genetics life experiences.

Every post is a free gift to the collective of minds composing the living bleeding edge of LEV development on our spaceship.

User avatar
amberwolf
100 GW
100 GW
Posts: 23963
Joined: Aug 17, 2009 6:43 am
Location: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group
Contact:

Re: volocopter

Post by amberwolf » Apr 29, 2017 3:13 am

craneplaneguy wrote:Not sure if this has been on here,
this search lists all posts with the word in them
https://endless-sphere.com/forums/searc ... mit=Search
and this is a list of topics that mention it
https://endless-sphere.com/forums/searc ... mit=Search

flat tire
10 kW
10 kW
Posts: 766
Joined: Feb 26, 2014 12:20 am

Re: volocopter

Post by flat tire » Apr 29, 2017 12:33 pm

Control authority and redundancy* (*yes I will explain this below) are NOT practical advantages this thing has over existing helicopters. The practical advantages this thing has over a helicopter are 1) it's vastly mechanically simpler and 2) very easy to fly (ONLY because it incorporates full authority digital control software, which helicopters can also use--just due to tradition, great expense in certification, and existing high barriers to flying helicopters nobody's gotten around to doing this for a low-cost general aviation helicopter).

Helicopters with semi-rigid or fully articulated rotor systems are capable of really EXTREME control authority provided the craft is engineered to handle the resulting forces. Multi rotors can only dream of doing the kind of maneuvers these helicopters can do. Just look at the RC world.

The multi motor scheme is definitely NOT a survivability advantage and not necessarily a reliability advantage either. Maybe you can have 2 motors fail maximum...at that point, if you have another motor failure and you're more than a certain distance above the ground death is nearly guaranteed! Helicopters can safely descend from most combinations of height and speed under full control with exactly NO engines running. And of course you need to learn the safe height / speed curve for your aircraft, to avoid being in an unrecoverable situation should the engines quit. Now, if the probability of a catastrophic powertrain / control failure (since they're basically one and the same) can be shown to be lower than the probability of an experienced pilot botching his auto after his reliable, certified engine fails...then you have something. I think that may take a while to show, although I don't think there will be a shortage of willing pilots for full digital craft like these.

Efficiency it does not have over helicopters either. The disc loading in a multirotor is rather high compared to a helicopter whose disc terminates at similar dimensions as the multirotor props. And, most human-bearing helicopters run at one speed only, allowing the powertrain to be optimized for that speed. Multirotors, unless they're collective pitch, have no choice but to use drive speed to vary thrust. Then, you have the additional issue that the multirotor props are fixed pitch--they're forced to run at high angle of attack in cruise (or low AoA and very high RPM for low speed flight) whereas the helo disc is big, make a lot of lift, and can cruise at relatively low mean AoA.
Orange DH w/ Cyclone mid on 6kw
Gary Fisher w/ Leaf hub on 6kw
RC Lipo and domino throttles only!

dirkdiggler
10 kW
10 kW
Posts: 730
Joined: Oct 18, 2012 1:31 am

Re: volocopter

Post by dirkdiggler » Apr 29, 2017 6:57 pm

Here's the RC world comparison:



Do you ever see heli's doing fpv racing like this? Haven't seen that yet, but may exist somewhere.


Quads seem to have taken over. Why is that? Difficult and expensive, just like the full size versions. Most heli pilots eventually end up dead, so much for the safety of engine failure. Who knows what will happen with full size quads? I know a bunch of mine have dropped like dead ducks out of the sky. Even our local gyrocoptor instructors have deaths every few years. Its not the air that kills, but the ground.

dirkdiggler
10 kW
10 kW
Posts: 730
Joined: Oct 18, 2012 1:31 am

Re: volocopter

Post by dirkdiggler » Aug 10, 2017 6:54 pm

Another promo video

Post Reply