Go Back  PPRuNe Forums > Aircrew Forums > Rotorheads
Reload this Page >

Helicopter max climb altitude

Rotorheads A haven for helicopter professionals to discuss the things that affect them

Helicopter max climb altitude

Old 4th Nov 2019, 11:45
  #41 (permalink)  
 
Join Date: Dec 2008
Location: Top of the World
Posts: 91
Devil

Originally Posted by T18 View Post
Namaste VF

I keep looking at the threads for your contribution, glad to hear you are well, can you give us a clue as to your whereabouts and what you are up to?
Missing the sleek trim photographs of.........helicopters, hope Mrs VF is well.

Regards,
T18
G'day Mate....thanks, all is well! Pretty busy checking & training Mountain & Long-lining in the alps Love to post more on that ToW thread but it got to hard with slash & burn tactics removing to many posts, rewordings & photo deletions.......see my thread count, I'm still hobbled on half a stump

All the very Best to You T18
Vertical Freedom is offline  
Old 4th Nov 2019, 12:10
  #42 (permalink)  
 
Join Date: Dec 2008
Location: Top of the World
Posts: 91
Unhappy

Originally Posted by MikeNYC View Post
Having spent a bit of time on filming jobs at 10k+ AGL in helicopters, I disagree.
I'll double it or nothing...no wait triple it Mate; it surely is a whopping adventure up there albeit bloody COLD
Vertical Freedom is offline  
Old 5th Nov 2019, 11:59
  #43 (permalink)  
 
Join Date: Jun 2004
Location: UK Scotland
Age: 59
Posts: 181
Hi VF
Sorry I missed your reply Iíve been busy with work
That explains it well. I was told O2 above 10K on my pplh
but thought you guys doing it all the time may not use it all the time as you explained.
Unlikely Iíll ever be that high.


Thanks R
RINKER is offline  
Old 5th Nov 2019, 20:19
  #44 (permalink)  
 
Join Date: Nov 2006
Location: After all, what’s more important than proving to someone on the internet that they’re wrong? - Manson
Posts: 1,577
Be a little careful with Fred North's "record" - it is a little "shy" on "evidence". i.e. unofficial.
RVDT is offline  
Old 6th Nov 2019, 21:40
  #45 (permalink)  
 
Join Date: May 2017
Location: Atlantic Ocean
Posts: 91
Originally Posted by Fareastdriver View Post
Unless you are gong to look at something that is 10,000ft. plus there seem little point of going that high.
Flying to an oil rig 180NM away with predominant tailwind of more than 30kt and no refuel offshore, climbing to up to 9000 or 10000ft coming back to take at least a crosswind makes sense for me.
Jimmy. is offline  
Old 24th Nov 2019, 01:44
  #46 (permalink)  
 
Join Date: Nov 2007
Location: Massachusetts
Age: 64
Posts: 171
I've been high twice in an R22... Once going from Hartford, CT back to Boston... There were really high tail winds aloft so I climbed to, I think it was 11,500 ( this was in the eighties, so I don't remember exactly ). We had LORAN in those machines so I know I was doing 140 knots over the ground.. which is pretty good for an R22. When I got handed off to Boston the controller asked aircraft type and did the ATC equivalent of a double take when I told him R22.

Bringing an R22 home from the factory I went high in West Texas for the same reason. In that case every time I would push the stick forward the entire aircraft would shudder and the stick would push back, even though there was plenty of stick travel left. After a few repetitions I finally thought to check the VNE chart... Realized THAT'S what retreating blade stall feels like in an R22... ( Tim Tucker at Robinson always said retreating blade stall at sea level is 150 in an R22... And I mostly fly at sea level... So it took a while to connect the temperature and altitude to the fact that I was flying way too fast.)

Finally coming out of White Plaines ( just north of New York City) IFR in the B206L3 I fly ( probably in the late 90s?) IFR, ATC climbed me to 12 for a little while before turning me east and letting me descend... But I was IMC so I don't remember anything unusual except the hands on the altimeter looking a little strange... ( and that it took a while to climb that high... I was heavy with fuel ).

The only time I found it really disturbing was that first time... The horizon was in an unusual position on the windshield, and I remember that my attitude flying sucked. No attitude indicators in R22s in those days, so that made it a little more... challenging to keep the machine level.

I guess that's pretty pathetic compared to VF!
Paul Cantrell is offline  
Old 24th Nov 2019, 18:51
  #47 (permalink)  
 
Join Date: Jul 2008
Location: Canada
Posts: 309
I surveyed (bird towing) the top of the Chilean Andes from Copiapo Chile to North of Antofagasta from West to East to the border of Argentina and back everyday for almost 4 months (time off in between) Did that with a B205 -17 and regular blades (single hyd) the everage fuel burn at close to sea level is about 610 to 615 lbs an hour, Le whole job was done at between 20,000 to 25,000ft DA and the average fuel burn at that altitude was about 400 to 415 lbs an hrs. I know the maximum altitude 204 blades will go to, but the T53-17 would have had no problems going higher.

JD
fijdor is offline  
Old 25th Nov 2019, 21:04
  #48 (permalink)  
 
Join Date: May 2008
Location: Wilts
Posts: 89
As an experienced rotary operator, I offer my thoughts.

Jet engines become more efficient as height increases (at least in the height band in which we operate), but rotors become less efficient. So the optimum operating altitude in still air will be different for every engine/rotor combination.

The expression 'in still air' is very significant, in my opinion. The greatest factor in efficiency is, by far, wind velocity. Go high when there is a tail wind component, and low when there is a head wind component. The choice of height in the tail wind option will depend on wind velocities at height, rather then engine/rotor efficiencies.
KG86 is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright © 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.