RunRyder - Safety idea/question...

rrTV-PHOTO

New HD TV

HOME rrTV-PHOTO GALLERIES MY GALLERY HELP-FAQ

myHOME PM pmRR MEMBERS 393 ONLINE 45 EVENTS SEARCH REGISTER START HERE

2 pages [ << < ( 1 ) 2 NEXT >> ]

1914 views

POST REPLY

Esprit Model	.	Thunder Power RC	.	Real Raptors
	.		.

Safety - RC Helis are not toys > Safety idea/question...

engineerdestroy
Heliman
Location: Kennesaw, GA - USA

Has anyone made a device that could completely stop the blade rotation in the event of a crash? If not, do you guys think it would be possible to set up a servo that would push a rod into the rotor head or something like that? I understand that more than likely the forces involved would probably just rip the bird into peices creating a shrapnel grenade lol, but their might be a way you could accomplish it...

Blade CP Pro

01-16-2008 12:05 AM

HOMEPAGE

colsy
Elite Veteran
Location: Cambridge, UK

Quote
do you guys think it would be possible to set up a servo that would push a rod into the rotor head

from a 23 year old that's 'Disappointing'

col.

Only Quote From Experience.

01-16-2008 12:08 AM

HOMEPAGE

rcfreak7
Senior Heliman
Location: southern california

what about a little disk brake on the main shaft?

squish the bread to save the berries

01-16-2008 01:02 AM

ErichF
Key Veteran
Location: Odessa, FL 33556 (Tampa Area)

Like this?

01-16-2008 01:11 AM

rcfreak7
Senior Heliman
Location: southern california

yea and have the servo clintch the rotor when throtle hold is applied

squish the bread to save the berries

01-16-2008 01:13 AM

JEEPWORLD2002
Key Veteran
Location: BLUEBELL PA USA

to prevent a chicken dance

why not just use a return spring ? cheaper. or more like a rotor brake so u dont have to wait for it to spool down ?

Trex600n Trex500 Mikado LoGo5003d// Hacker, CastleCreations,Ys 50, JR 7703d/8900, Radix

01-16-2008 01:16 AM

BigguyOz
Key Veteran
Location: Sydney, New South Wales, Australia

I don't know about you guys, but if I hit throttle hold and the heli isn't on the ground, I want that rotor to keep spinning, as an auto is my only hope of saving the heli!

Now if you are talking about minimising damage on the ground, well some sort of brake on the mainshaft sounds like a good idea, certainly less catastrophic than pushing a rod into the rotor head. But even then, I would question the benefits vs. the extra weight.

How likely is this going to be needed? What circumstances justify such a device? Adding a brake to the mainshaft would require serious redesign on most helicopters...

Just asking...

Tony Stott
Scenefromabove.com.au
Trex 450,AP2000i,Askman
8m mast
hot air balloon
kite

01-16-2008 02:56 AM

HOMEPAGE

ut_neon
Key Veteran
Location: Coimbra, Portugal

i think that's the worst idea ever... helicopters are made of pieces to break in order to save the important ones... don't you agree?

01-16-2008 03:29 AM

wlfk
Veteran
Location: uk

I'd have thought it would be quite simple - just lock up the one-way bearing and use a relay + big resistors to the motor - assuming electric. By shorting out the motor leads you'd turn it into a pretty effective brake.

I have wondered whether people could use something like this in conjunction with a ballistic parachute so they could use small helicopters for AP. Mostly AP helicopters are sized to autorotate with a full payload. Most of our machines can carry far heavier loads than they would be able to auto safely.

K

A bit like a kite, but 500 times more expensive

01-16-2008 03:44 AM

engineerdestroy
Heliman
Location: Kennesaw, GA - USA

Quote
From a 23 year old that's 'Disappointing' col.

Not exactly sure what you mean by that...But thanks for the useless comment. The only reason for this would be to kill all blade movement so when your barreling towards your friends/family after a few beers you wont hack them into dog food. That mini rotor disk looks awsome!

Blade CP Pro

01-16-2008 09:57 PM

HOMEPAGE

ErichF
Key Veteran
Location: Odessa, FL 33556 (Tampa Area)

Yeah, well it's not for what you're thinking. It's just a brake to stop the head on very large models with 1000+mm blades on large turbines. You can't reach the head button and palm-brake the head as usual on those things.

What you are describing wouldn't be possible. Someone smarter than me can do the math, but there's a TON of interia in a spinning rotor system that can't be stopped by anything light enough that you'd want the heli to be flying around with. That's even more true if the motor is still developing power.

01-16-2008 10:28 PM

BeltFedBrowning
Senior Heliman
Location: Albany, MO USA

Math problem- Beers+RC Helicopter=Out of control helicopter

01-16-2008 11:38 PM

BigguyOz
Key Veteran
Location: Sydney, New South Wales, Australia

Hmm, that age comment is starting to look more relevant...

Tony Stott
Scenefromabove.com.au
Trex 450,AP2000i,Askman
8m mast
hot air balloon
kite

01-17-2008 12:37 AM

HOMEPAGE

engineerdestroy
Heliman
Location: Kennesaw, GA - USA

Thanks for your input guys. As for the others posting here and contributing nothing...I dont understand wtf you people are on a RC Safety Message Board critisizing me for an idea I had for making a helicopter more safe. That is beyond lame. So, If you have a problem with me or something I have posted, please PM me about it. But more than likely your just looking for attention so that probably won't happen...

Blade CP Pro

01-17-2008 01:51 AM

HOMEPAGE

rcadd1ct
Elite Veteran
Location: Richardson, Texas

Build it to fly not crash.....

In order to stop the momentum of the spinning blades you will really have to reinforce the mount points.

It could be done, but after you get over crashing....it will just be something else to fail.

-RCA .......... Making Cuisinarts Fly!!!!!!!

01-17-2008 02:14 AM

BigguyOz
Key Veteran
Location: Sydney, New South Wales, Australia

I would suggest that your comments like "The only reason for this would be to kill all blade movement so when your barreling towards your friends/family after a few beers you wont hack them into dog food" are an invitation for people to not take you seriously.

I offered a logical opinion on response before you made the above comment.

Tony Stott
Scenefromabove.com.au
Trex 450,AP2000i,Askman
8m mast
hot air balloon
kite

01-17-2008 02:48 AM

HOMEPAGE

aerton
Senior Heliman
Location: Longueuil, QC, Canada

If you add friction to the blades in the air, as to trying to stop them, simply the whole helicopter will rotate along with he blades.
It has nothing to hold itself against so, there's pretty much no useful way of stopping the blades.

To illustrate this phenomenon, when autoing without tail rotor and pushing the pitch up at the end, helicopter rotates along the dir of rotation of blades. Bearing friction pushes it. So this inertia has to go somewhere, it can't just dissappear.

01-17-2008 04:19 AM

HOMEPAGE

BeltFedBrowning
Senior Heliman
Location: Albany, MO USA

You ask why we are critisizing you? You posted (in the safety forum) that you are flying your heli while drinking, and close to your friends and family.
Time to read the AMA guidelines again.

01-17-2008 04:36 AM

TachyonDriver
Senior Heliman
Location: Chipping, Lancs, UK

Pretty much what aerton said..

Little Spinning Bundle of Joy®

01-17-2008 09:00 AM

engineerdestroy
Heliman
Location: Kennesaw, GA - USA

The only reason for this would be to kill all blade movement so when your barreling towards your friends/family after a few beers you wont hack them into dog food

It was a joke ladies. You know, an attempt at humor. I am assuming terrible accidents have happened involving rc helis being flown in completely safe AMA flying areas by people who have been in the hobby for years (and NOT under the influence), so I think my idea holds some sort of ground. I simply wanted to post an idea I had and immedietely catch flack by some e-tards fishing for attention because my understanding of physics isn't up to par with theirs. Excuse me for my ignorance, but keep your personal opinions of me to yourself or PMs. Odd I have recieved no PMs from any of these tools.

And again, Thanks to all that have contributed useful post.

Blade CP Pro

01-17-2008 02:16 PM

HOMEPAGE

2 pages [ << < ( 1 ) 2 NEXT >> ]

1914 views

POST REPLY

Mikado Modellhubschrauber	.	GrandRC	.	CanoMod
	.		.

Safety - RC Helis are not toys > Safety idea/question...

UPDATE SCREEN PRINT TOPIC

Advertisers

Subscribe to This Topic