Author Topic: Hurri I and negative G engine shotdown  (Read 729 times)

Offline Xjazz

  • Gold Member
  • *****
  • Posts: 2653
Hurri I and negative G engine shotdown
« on: August 30, 2003, 05:27:44 PM »
Hi,

I have a fly lately Hurri I alot. Few times I had engine shotdown during the fight I had to hit E-key to start engine again.

I use hotas and engine toggle function is not programmed to the stick or throttle.

I had try reproduce this mystery shotdown in offline with 0G (or bit less) and with allmost full redout paradolic flight path.
I try to push as long as possible 0G or less.

No success so far, because every time I pull out from dive (end of parabolic) engine start again.

Anybody else has same expirience with Hurri I?

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #1 on: August 30, 2003, 07:28:53 PM »
Yes.  Neg G's in a Hurri I (or a Spit I for that matter) cuts the engines out.  It's an historic detail that AH added.  

At least that's what I THINK is causing what you are experiencing.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline BenDover

  • Platinum Member
  • ******
  • Posts: 5803
Hurri I and negative G engine shotdown
« Reply #2 on: August 30, 2003, 07:35:39 PM »
I think he's saying that sometimes the engine cuts out, and doesn't come back on even when he pulls back up.

Offline Xjazz

  • Gold Member
  • *****
  • Posts: 2653
Hurri I and negative G engine shotdown
« Reply #3 on: August 30, 2003, 07:52:57 PM »
Quote
Originally posted by BenDover
I think he's saying that sometimes the engine cuts out, and doesn't come back on even when he pulls back up.


Jep, question is NOT about the enige cutout during the 0G or less maneuver. Question is why engine shotdown/off?

Offline Shane

  • Platinum Member
  • ******
  • Posts: 7983
Hurri I and negative G engine shotdown
« Reply #4 on: August 30, 2003, 07:55:29 PM »
floating carb.
Surrounded by suck and underwhelmed with mediocrity.
I'm always right, it just takes some poepl longer to come to that realization than others.
I'm not perfect, but I am closer to it than you are.
"...vox populi, vox dei..."  ~Alcuin ca. 798
Truth doesn't need exaggeration.

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #5 on: August 30, 2003, 09:52:42 PM »
Shane, are you saying that extended Neg G's kills the engine dead because of it's floating carb?  What I mean is that an extended Neg G kills the engine to the point where it won't come back on unless you restart the engine?
« Last Edit: August 30, 2003, 09:56:32 PM by DiabloTX »
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline Pei

  • Silver Member
  • ****
  • Posts: 1903
Hurri I and negative G engine shotdown
« Reply #6 on: August 30, 2003, 10:59:40 PM »
I'd imagine that if the engine is dead for long enough you would need to restart it from scratch. Not sure if this is modelled though.

Offline hyena426

  • Silver Member
  • ****
  • Posts: 1756
Hurri I and negative G engine shotdown
« Reply #7 on: August 31, 2003, 03:42:24 PM »
ya,,shane is right on the money,,its because the gas is not forced down in the motor on hurrican 1,,,thats why fuel injection was put on most air planes,,floating carbs like on a car,,,gas cant flow under negivtive g's,,either can any liqiud,,thats why most planes have pressurized gas tanks and fuel injection too,,,so it pushes the gas down into the cylinders

Offline MiloMorai

  • Platinum Member
  • ******
  • Posts: 6864
Hurri I and negative G engine shotdown
« Reply #8 on: August 31, 2003, 09:44:55 PM »
The early Hurricanes and Spitfires had the engine cut-out under neg G because the engine flooded.

There was a hichup initially but the float valve open completely when the a/c inverted and allowed fuel under pressure from the pump to enter the induction system resulting in an overly rich condition.

The problem was fixed by a female engineer named Tilley.

Offline MiloMorai

  • Platinum Member
  • ******
  • Posts: 6864
Hurri I and negative G engine shotdown
« Reply #9 on: August 31, 2003, 09:46:04 PM »
The early Hurricanes and Spitfires had the engine cut-out under neg G because the engine flooded.

There was a hichup initially but the float valve open completely when the a/c inverted and allowed fuel under pressure from the pump to enter the induction system resulting in an overly rich condition.

The problem was fixed by a female engineer named Tilley.

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #10 on: August 31, 2003, 10:24:02 PM »
Errrrgh...no, my question was in AH if you go neg g's too long does the engine cut require a restart manually?  In my experience the engine always came back after a pull up but have not seen what it does after sustained neg g's.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #11 on: August 31, 2003, 10:24:19 PM »
Errrrgh...no, my question was in AH if you go neg g's too long does the engine cut require a restart manually?  In my experience the engine always came back after a pull up but have not seen what it does after sustained neg g's.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #12 on: August 31, 2003, 10:24:20 PM »
Errrrgh...no, my question was in AH if you go neg g's too long does the engine cut require a restart manually?  In my experience the engine always came back after a pull up but have not seen what it does after sustained neg g's.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #13 on: August 31, 2003, 10:24:22 PM »
Errrrgh...no, my question was in AH if you go neg g's too long does the engine cut require a restart manually?  In my experience the engine always came back after a pull up but have not seen what it does after sustained neg g's.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo

Offline DiabloTX

  • Plutonium Member
  • *******
  • Posts: 9592
Hurri I and negative G engine shotdown
« Reply #14 on: August 31, 2003, 10:24:27 PM »
Errrrgh...no, my question was in AH if you go neg g's too long does the engine cut require a restart manually?  In my experience the engine always came back after a pull up but have not seen what it does after sustained neg g's.
"There ain't no revolution, only evolution, but every time I'm in Denmark I eat a danish for peace." - Diablo