It is currently Thu May 02, 2024 4:47 pm



Reply to topic  [ 16 posts ] 
 Helicopter rotor without any visible vibrations 
Author Message

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
Hi all,

this video amazed me ... this man's heli stick has absolutely no vibrations at all





is it because it is an helicopter rotor or because it is a really well built rotor ?

I did not know this Hungarian heli ... smart people

G


Mon Jan 09, 2023 5:19 am
Profile
Online
User avatar

Joined: Thu Nov 07, 2013 12:56 am
Posts: 2984
Location: VERY LOW LOW LOW EARTH ORBIT
Has thanked: 2833 times
Been thanked: 3658 times
He's showing off his trim system

With the gyros the mass of the rotors and the teeter /control system are moved out of the center of rotation shifting the mass spanwise & chordwise with each revolution.

Your stubby mast is tilted for your cyclic feathering a helicopter uses a swashplate and a fixed mast :pbunny


Mon Jan 09, 2023 2:18 pm
Profile

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
yep you are right, I only have flown gyros and know nearly nothing about helis even if we have a kompress in the hangar
it is true that it is not the same but I was amazed to see this shakeless trimed stick


Mon Jan 09, 2023 5:26 pm
Profile
Online
User avatar

Joined: Thu Nov 07, 2013 12:56 am
Posts: 2984
Location: VERY LOW LOW LOW EARTH ORBIT
Has thanked: 2833 times
Been thanked: 3658 times
Test flew a CH-7 it was like a mini Jet Ranger - smooth balanced controls - easy to just hop in and fly, then the engine quit
The autorotation was a non event to a perfect landing. . . Oil stand pipe sucked air at 1/2 a tank...

Lots of one offs through the years . The CH-7 Marianos MC 1 and Kevens CH-7 copy were #1 - The only gripes was the power plants conking out


Mon Jan 09, 2023 6:35 pm
Profile
Online
User avatar

Joined: Wed Nov 06, 2013 5:21 am
Posts: 7085
Location: Lost
Has thanked: 115 times
Been thanked: 8443 times
I like the CH-7, it is a sweet little copter from what I have seen.

_________________
It's never too late to be a bad example.

I spent all my money on Bikes, Broads, and Booze, the rest I wasted.


Mon Jan 09, 2023 6:44 pm
Profile

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
yes it seems to be a nice heli from what I can see in the hangar, the only thing is that the fellow who own it enventually prefers flying his M22 gyro, certainly because he learnt to fly helis to late (he is 65) and that he will never become a real heli pilot

he is afraid in fact


Tue Jan 10, 2023 2:58 am
Profile
User avatar

Joined: Sat Nov 12, 2022 6:54 am
Posts: 18
Has thanked: 20 times
Been thanked: 27 times
A few of the mustering gyro pilots in central australia have converted to ch7 helicopters. Apparently they fair well in the dusty conditions. They'd be putting some hours through them

I wish they made the single seat hungarocopters like in that video. They still make a stealthy looking two seater


Sat Jan 14, 2023 7:42 am
Profile

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
If I remeber well one of our email converstation, Wolfy had told me that there has been a change in the kompress ch7 service program and that the cost of maintenance had sky rocketed making some of the CH7 mustering pilot to think to come back to gyroplane

Wolfy was spending long days in flight on a gyro .. the heli cost for the same work would be prohibitive

the ch7 is a really good machine .. reliable and safe compared with other ultralight helis ... we had to lethal crashes in montélimar with those small helis ...


Sat Jan 14, 2023 5:03 pm
Profile

Joined: Fri Dec 16, 2022 6:39 pm
Posts: 65
Has thanked: 26 times
Been thanked: 134 times
The only gripes was the power plants conking out[/quote]

Ha that's a pretty big gripe ;) Glad it all went well.


Thu Jan 26, 2023 3:39 am
Profile

Joined: Fri Dec 16, 2022 6:39 pm
Posts: 65
Has thanked: 26 times
Been thanked: 134 times
Girodreamer wrote:
Hi all,

this video amazed me ... this man's heli stick has absolutely no vibrations at all





is it because it is an helicopter rotor or because it is a really well built rotor ?

I did not know this Hungarian heli ... smart people

G


That's astonishingly well set up smooth as silk. Takes ages to get rotor system on a gyro that good have to be more difficult with a chopper with all the additional moving parts. It would inspire confidence in the design.


Thu Jan 26, 2023 3:41 am
Profile
Online
Site Admin
User avatar

Joined: Tue Sep 02, 2014 7:45 am
Posts: 10074
Location: Poona, Qld, OZZY
Has thanked: 21612 times
Been thanked: 6097 times
It could be because the rotors were made by well hung-garians? :noidea

Nabs would know for sure :laughing :kissmyass :yoda2 :Wolvie

:Jim

:Confederate

_________________
I do all of my own stunts..... most of them are even planned! Ok, Ok.... some of them are planned..

If electricity comes from ELECTRONS, then surely morality comes from MORONS??


Fri Jan 27, 2023 2:57 am
Profile

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
Hi Murray,
Hilberg has provided the explanation of this in his message (quoted below)
I think it explains most of the difference in vibrations btw helis and rotors
following the advice of a friend, on my home made rotor head, I have lowed down the teetering axle by 25 mm (compared with my Averso rotor head) modifying the rotor head main body bar and getting rid of the drum brake
I don't know if it will have any effect on the vibrations, but it will at least reduce the cantilever force on the controls which is greater on tandems.


Hillberg wrote:
He's showing off his trim system

With the gyros the mass of the rotors and the teeter /control system are moved out of the center of rotation shifting the mass spanwise & chordwise with each revolution.

Your stubby mast is tilted for your cyclic feathering a helicopter uses a swashplate and a fixed mast :pbunny


Fri Jan 27, 2023 3:20 am
Profile
Online
Site Admin
User avatar

Joined: Tue Sep 02, 2014 7:45 am
Posts: 10074
Location: Poona, Qld, OZZY
Has thanked: 21612 times
Been thanked: 6097 times
Giro... my last post was a joke (attempted humor)

In english, 'well hung' means a big dick :laughing so we tease Nabs about being a 'well hung' -arian... you have to be silly and have 'school boy humor' like us to understand :laughing :rofl :chainsaw :wol2 :Wolvie

:Jim

:Confederate

_________________
I do all of my own stunts..... most of them are even planned! Ok, Ok.... some of them are planned..

If electricity comes from ELECTRONS, then surely morality comes from MORONS??


Fri Jan 27, 2023 6:50 am
Profile

Joined: Tue Mar 24, 2020 5:39 am
Posts: 1056
Location: France
Has thanked: 649 times
Been thanked: 1733 times
ok (((-:

idioms are the most difficult thing to learn in a foreign langage .. (((-:

in french we say "bien monté" hahahaha just in case you meet a french girl ... if she says "il est bien monté" speaking about you is that she is happy with your gun


Last edited by Girodreamer on Sat Jan 28, 2023 4:11 am, edited 1 time in total.



Fri Jan 27, 2023 4:59 pm
Profile
Online
Site Admin
User avatar

Joined: Tue Sep 02, 2014 7:45 am
Posts: 10074
Location: Poona, Qld, OZZY
Has thanked: 21612 times
Been thanked: 6097 times
Girodreamer wrote:

if she says "il est bien monté" speaking about you is that she is happy with your gun


Strangely... no girl has ever said that to me? (in any language) :noidea :laughing :badluck :Wolvie

:kissmyass

:Confederate

_________________
I do all of my own stunts..... most of them are even planned! Ok, Ok.... some of them are planned..

If electricity comes from ELECTRONS, then surely morality comes from MORONS??


Fri Jan 27, 2023 6:59 pm
Profile
Online
User avatar

Joined: Thu Nov 07, 2013 12:56 am
Posts: 2984
Location: VERY LOW LOW LOW EARTH ORBIT
Has thanked: 2833 times
Been thanked: 3658 times
MadMuz wrote:
Girodreamer wrote:

if she says "il est bien monté" speaking about you is that she is happy with your gun


Strangely... no girl has ever said that to me? (in any language) :noidea :laughing :badluck :Wolvie

:kissmyass

:Confederate


Be lucky no guy said that to you :pbunny Unlike that Phizer fag who lost his shit in that pizza place with Project Veritas

https://www.youtube.com/watch?v=jXIvWtMVtcs

https://www.youtube.com/watch?v=2SjtYsET8Tc


Fri Jan 27, 2023 8:08 pm
Profile
Reply to topic   [ 16 posts ] 

Who is online

Users browsing this forum: gyrocfi, gyrogary and 134 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software.
Americanized by Maël Soucaze.