PPRuNe Forums

Go Back   PPRuNe Forums > Aircrew Forums > Rotorheads
Forgotten your Username/Password?

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


Reply
 
Thread Tools
Old 27th Dec 2012, 21:22   #1 (permalink)
 
Join Date: Feb 2008
Location: new jersey, usa
Age: 68
Posts: 7
Question gust spread question

just a quick question about wind gust spreads. it's been two decades since i worked with rotorcraft, but a question just occurred to me today due to the extreme weather we've been experiencing of late (just recently in the south and the northeast where i reside). what is or was the maximum safe gust spread for the old two-bladed jet rangers and long rangers, and also dauphins and a-stars? i seem to remember 40, but that seems extreme. thanks in advance for your answers.
eastsidewillie is offline   Reply
Old 28th Dec 2012, 13:26   #2 (permalink)
"Just a pilot"
 
Join Date: May 2001
Location: Jefferson GA USA
Age: 65
Posts: 510
Many operators limit the operation of their helicopters to 15 knots or less gust.
Devil 49 is offline   Reply
Old 28th Dec 2012, 16:43   #3 (permalink)
 
Join Date: Oct 2003
Location: Over here
Posts: 979
Maximum 40 knots, with a 15 knot gust spread is a common limit for many operators, but I don't know of an RFM limitation. The maximum wind speed, and the gust spread, may be lower in some cases, depending on the pad, the obstructions around it, and the location of the helicopter on the pad.
Gomer Pylot is offline   Reply
Old 28th Dec 2012, 17:03   #4 (permalink)
 
Join Date: Jan 2001
Location: UK
Age: 61
Posts: 1,353
The RFM wind limits (if any) usually relate to rotor start or stop. This is because of the flexing of the blades during low RPM rotation in gusts and the risk of hitting something (like the tail).
Helinut is offline   Reply
Old 29th Dec 2012, 07:25   #5 (permalink)
 
Join Date: Apr 2000
Location: EGDC
Posts: 4,185
Eastsidewillie - just to clarify, do you mean the maximum steady and gusting wind speeds for rotor start/stop or do you mean the maximum gust above the mean wind speed in flight?
crab@SAAvn.co.uk is offline   Reply
Reply
 
 
 


Thread Tools


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



All times are GMT. The time now is 15:47.


vBulletin® v3.8.7, Copyright ©2000-2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
1996-2012 The Professional Pilots Rumour Network