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HomeAircraftHelicopterHelicopter Main Discussion › item improvement ideas?
04-23-2009 12:26 AM  9 years agoPost 41
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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FI type engines by OS
Looks like OS has discontinued their FI engines.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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04-23-2009 08:10 PM  9 years agoPost 42
Colibri

rrKey Veteran

The Netherlands

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Let's eliminate cables all together:

Since some heli frames are already made of printed circuit board material. why not also put the copper circuit on it with connectors near the servo's.

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04-23-2009 08:42 PM  9 years agoPost 43
snjbird

rrKey Veteran

Kissimmee, Florida- USA

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Let's eliminate cables all together:

Since some heli frames are already made of printed circuit board material. why not also put the copper circuit on it with connectors near the servo's.
OOhh I like that, embedded wire in the frame, Heck yea! Just need a short wire from the servo to the small plug in! sweet!!

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04-23-2009 09:08 PM  9 years agoPost 44
Sam2b

rrElite Veteran

Tacoma, WA

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item improvement ideas?
Switching regulators inside of transmitters for longer battery life.

(yes, some guys actually fly that much in one day)

_Sam B_

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04-23-2009 10:10 PM  9 years agoPost 45
VooDooX

rrElite Veteran

San Francisco Bay Area CA, US (San Mateo)

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Since some heli frames are already made of printed circuit board material. why not also put the copper circuit on it with connectors near the servo's.
sounds like one more part to fail due to corrosion or arcing or something we didn't think of

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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04-23-2009 10:16 PM  9 years agoPost 46
countrypilot

rrNovice

Billings,Montana

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What would there be left to do if all these became commonplace????

How about just hiring someone to build and fly your heli's????LOL

Actually the moving sim stick thing is a very cool idea!

A good day flying is when you come home with everything in one piece

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04-24-2009 12:06 AM  9 years agoPost 47
UH-1N

rrNovice

New Hampshire

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I propose that every LHS be required to have a good looking Babe behind every Heli counter!

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04-24-2009 12:13 AM  9 years agoPost 48
VooDooX

rrElite Veteran

San Francisco Bay Area CA, US (San Mateo)

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scantily clad as well

Velocity 50 "99.9999999999999% of an atom is empty space." also 01001000 01001001

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04-24-2009 12:43 AM  9 years agoPost 49
Yug

rrMaster

UK. Herts

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For many years, I've been trying to come up with the right technology to drive the blade grips directly from within the hub. ie, some kind of integral piezo motor/electromagnetic drive/pneumatic and so on. This would do away with all the mechanics (swash, pushrods etc), servos and obviously the flybar. The benefits would be huge not to mention the fact that the oscillatory profile of the grips could be tuned in a non sinusoidal manner which would benefit blade performance in many ways.
Sadly, all the 'actuator/motor' technoligies I've researched, fall short in one way or another However, It's just a matter of time before the right technology becomes available.

Vegetable rights and Peace

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04-24-2009 12:50 AM  9 years agoPost 50
GimbalFan (RIP)

rrProfessor

Big Coppitt Key, FL

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non sinusoidal
We found sinusoids on our hasselblads a few years ago. For a few tense days our shluters wouldn't splorsh -- but a few well-placed shots of freshly poured fresnel on our frampton grapplers fixed us right back up.

op-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-thwop-t

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04-24-2009 03:37 PM  9 years agoPost 51
darkfa8

rrElite Veteran

Brick, NJ - USA

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Yug,

another alternative to your idea would be to replace the bearing section of the main grips with a stepper motor. This would essentially turn each main blade grip into it's own independant motorized assembly.

This would obviously require a motor that can provide equivalent torque, speed and handle the axial and radial loads.

Wiring could be routed through a common spindle and down the center of the main shaft. The main shaft would only have to be as tall to allow for proper blade clearance from the tail boom during loading.

This same theory could be applied to the tail as well.

This would eliminate our traditional linkages, mixers, washout, swash, cyclic & tail servos.

control could be integrated into a receiver/motor controller unit. of course it could be connected to a PC to allow you to adjust flight characteristics, pitch, calibration/self-tests, save setups, maybe even go so far as allowing settings to be uploaded both to and between the RX and TX. this would also mean that TX software would or could change.

... just a thought.

- Dan Goldstein
Team Revolectrix

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04-24-2009 04:31 PM  9 years agoPost 52
Yug

rrMaster

UK. Herts

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darkfa8

- that was pretty close to my first incarnation but the big problem was finding a suitable pair of stepper motors to satisfy size, resolution, speed and torque. Steppers also tend to be rather heavy due to the powerful magnets required, so I keep coming back to some kind of piezo motor, of which there are many topoligies to chose from. A helical-radial actuator type would be great as it has one moving part, much like a simple bender but it's tricky trying to get sufficient torque for the +/-20' of rotation. However, the relatively new Ultrasonic Piezo motors look promising. These are clever little beasties which use eigenmode resonance.

The 'wiring' for power and control also presents problems due to the fact that the shaft is rotating. I decided a axial transformer would probably be the best solution but then as is the way of things, I then gets to thinking about ways in which the main motor could be integrated into this. Then we can do away with the drive train !
This would still be compatible with those who prefer IC engines with a bit of modification.

Another early idea was to use piezo 'benders' in the blades themselfes. This has already been successfully done on a full size
However, there are certain aspects of our helis which would make this a bad idea given that it prevents individuals from using their preferred blades. Same applies to the tail rotors. However, the TR pitch would still benefit using a piezo motor given the minute size and of course weight, which would be significantly less than the servo and linkage.

With these ideas in place, I would expect a very significant weight reduction as well as a remarkably simple build not to mention the performance potential. Cost-wise, I would expect it to compare very favourably once such a system was in production.

It would kick bottom so to speak

Vegetable rights and Peace

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04-24-2009 04:57 PM  9 years agoPost 53
darkfa8

rrElite Veteran

Brick, NJ - USA

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Yug,

I think once you develop a pitch change mechanism that is so highly efficient and programmable, it may eliminate some of the need for fitting other brand blades to change flight performance/feel.

Another idea for the drivetrain would be to make the main shaft an integral part of the motor with the main shaft becoming the armature's shaft. Headspeed could be programmed/actively optimized during the flight, no drivetrain losses - a separate motor for the tail operating on the same principle.

I think implementing some of these things may eventually happen, it'll just take the right technology to be miniaturized and improved.

I can forsee an electric RC helicopter operating with no more servos and instead just one main receiver/motor controller/gyro unit, battery and then a size and cabin of your choice.

Lets hope someone smarter than us listening or developing such a thing. I'm no EE or aerodynamicist, but it's nice to dream up new ways of doing old things.

- Dan Goldstein
Team Revolectrix

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04-24-2009 05:39 PM  9 years agoPost 54
Yug

rrMaster

UK. Herts

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Perhaps you're right with regards to implementing the torsional bender in the blades themselves given that the innermost third of the blade doesn't contribute significantly to lift. It would be relatively straight forward to locate the bender within this area of the blade. This would offer a system with the least number of (moving) parts although crash costs might go up a tad.

Vegetable rights and Peace

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04-24-2009 05:59 PM  9 years agoPost 55
darkfa8

rrElite Veteran

Brick, NJ - USA

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if the technology is implemented in military (UAV), commercial (APV), industrial (fire/police), agricultural and hobby applications the costs may be significantly reduced.

- Dan Goldstein
Team Revolectrix

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04-24-2009 06:04 PM  9 years agoPost 56
Auto180_OCMA

rrApprentice

Futaba City Z (Mobara)

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Yes Except dont ever forget HUMAN FACTOR
Machines can not make intellegence decisions. How would you like to face OPTIMUS Maximus with a Gatlen gun pointing to you, and no Intellegence

Be carefull what you wish for

Have you ever gone to the airport and someone tells you the computer Say you dont have reservation

Well Computers to say anything, its what you put in it.

AMA 334000

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04-24-2009 10:05 PM  9 years agoPost 57
darkfa8

rrElite Veteran

Brick, NJ - USA

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i thought we were talking about improving what already exists as radio controlled models

NOT making them autonomous, but thanks for that heads up... I'll think on it a while

- Dan Goldstein
Team Revolectrix

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04-25-2009 12:07 AM  9 years agoPost 58
Yug

rrMaster

UK. Herts

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Given the electronic control systems required for these new to-be helis, making them autonomous is not a very big step away from the inital requirements of a jaw dropping 3D machine.
The more we can strip away mechanicals and replace with appropriate electronic control, the better, in every respect. I appreciate the comment on the Human Factor with regards to issues over computer systems and their weaknesses, but this kind of application for our helis is a world away from that environment.

Vegetable rights and Peace

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04-25-2009 12:39 AM  9 years agoPost 59
Gearhead

rrMaster

Vt

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I'll stick to my Swash and Linkages !!

Jim
Buzz Buzz Buzz

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04-25-2009 02:22 AM  9 years agoPost 60
Shawn Pierce

rrVeteran

Galliano, Louisiana

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how about a hydraulic sorta torque tube/ powered tail thingy? no gears to strip, no belts to pop. impella on the shaft with a micro pump? lightweight oil?

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HomeAircraftHelicopterHelicopter Main Discussion › item improvement ideas?
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