PPRuNe Forums


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

Reply
 
Thread Tools Search this Thread
Old 22nd Jan 2018, 23:25   #1 (permalink)
Thread Starter
 
Join Date: Dec 2003
Location: Melbourne, Australia
Posts: 140
Helicopter acceleration times

Just curious, am wondering if anyone knows fastest acceleration times from hover for various helicopters in the form of typical car-style measurements, such as 0-60 mph, 0-100 km/h or 0-54 knots.

I have scoured Google and found an estimate of 0-100 mph in 4 seconds for a Blackhawk from the ground. Sounds incredibly fast!
Tickle is offline   Reply With Quote
Old 23rd Jan 2018, 01:16   #2 (permalink)
 
Join Date: Oct 2007
Location: Here
Posts: 295
Empty weight: 10,624 lb (4,819 kg)
Max. takeoff weight: 23,500 lb (10,660 kg)

lets go for crew and a bit of fuel 7,000kg.

Powerplant: 2 General Electric T700-GE-701C turboshaft, 1,890 hp (1,410 kW) each

So 3,700hp and 7 tonnes.

500hp per tonne (or ton or short ton, who cares?).

Fast as ****.
jimjim1 is offline   Reply With Quote
Old 23rd Jan 2018, 01:40   #3 (permalink)
 
Join Date: May 2002
Location: "Deplorable but happy as a drunken Monkey!
Age: 69
Posts: 1,265
A Chinook would show about 700 SHP per Ton for a nearly empty Aircraft.

Then there is the CH-53K in the works....which is a real Horse.

But I would put my money on an OH-6 Little Bird for being a real Hot Rod!
SASless is offline   Reply With Quote
Old 23rd Jan 2018, 02:06   #4 (permalink)
 
Join Date: Jul 2014
Location: Japan
Age: 48
Posts: 62
Yes another vote of the OH6, most will give you a good 500HP per ton (660 hp/ton for a light AS350).

I would think the winner lies into which aircraft can bring the thrust vector forward the fastest, specifically with proximity of the ground. that means low rotor inertia on the longitudinal axis (short blade and many them) and low fuselage inertia (short tail)

in the context of a dive you could get much better accel I am sure
Agile is offline   Reply With Quote
Old 23rd Jan 2018, 02:47   #5 (permalink)
 
Join Date: Aug 2006
Location: Below Escape Velocity
Posts: 407
Granted, from the hover.

Um... lifting... is offline   Reply With Quote
Old 23rd Jan 2018, 03:15   #6 (permalink)
 
Join Date: Apr 2010
Location: Kansas
Age: 31
Posts: 90
army_av8r is offline   Reply With Quote
Old 23rd Jan 2018, 03:29   #7 (permalink)
 
Join Date: Dec 2004
Location: canada
Posts: 170
That's the vid I was thinking of, Army!!!
twinstar_ca is offline   Reply With Quote
Old 23rd Jan 2018, 10:07   #8 (permalink)
 
Join Date: Sep 2002
Location: Great South East, tired and retired
Posts: 1,623
Why did they call an NH90 a Tiger??

Back in the 70s, there was a race between a Lamborghini Countach and a Mirage fighter. I was positioned about 100' ahead of them along the runway in a UH-1B in SAR config with drop tanks etc, to film it.

At "GO!" the Lambo leapt off the mark, with the Mirage a little slower to move because he wasn't able to light the burner while the brakes were still on. The Mirage caught the Lambo just before the 1/4 mile mark, doing around 160kt, we were left wallowing along after reaching 90kt with all that drag.
Ascend Charlie is online now   Reply With Quote
Old 23rd Jan 2018, 11:40   #9 (permalink)
 
Join Date: Feb 2006
Location: On the big blue planet
Posts: 824
Quote:
Originally Posted by Ascend Charlie View Post
Why did they call an NH90 a Tiger??
There were two helicopters racing in that video, first the NH90 and the second one was a Tiger.

skadi
skadi is offline   Reply With Quote
Old 23rd Jan 2018, 13:30   #10 (permalink)
 
Join Date: May 2002
Location: "Deplorable but happy as a drunken Monkey!
Age: 69
Posts: 1,265
Have you ever met a Pilot who flew the Hughes 500 D/E or later models that did not just love flying the machine?
SASless is offline   Reply With Quote
Old 23rd Jan 2018, 18:06   #11 (permalink)
 
Join Date: Aug 2000
Posts: 1,485
SASless and I still do !
Hughes500 is offline   Reply With Quote
Old 25th Jan 2018, 01:43   #12 (permalink)
Thread Starter
 
Join Date: Dec 2003
Location: Melbourne, Australia
Posts: 140
Thank you for the posts and videos, very interesting and very impressive. I had a feeling the 500 was a true sports car, have seen a few YouTube videos where they move off pretty fast.
Tickle is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 23:48.


1996-2012 The Professional Pilots Rumour Network

SEO by vBSEO 3.6.1