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Search: Posts Made By: tgrendl
Showing results 1 to 35 of 75
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Forum: Rotorheads
24th Sep 2002, 18:39
Replies: 840
Views: 319,531
Posted By tgrendl

tigerpic, I would have lot's more questions...

tigerpic,

I would have lot's more questions about the indications, ranges etc for you.

When you say "oscillation" do you mean a vibration in the rotor system or a movement of the airframe?
...
Forum: Rotorheads
24th Sep 2002, 18:39
Replies: 621
Views: 94,282
Posted By tgrendl

tigerpic, I would have lot's more questions...

tigerpic,

I would have lot's more questions about the indications, ranges etc for you.

When you say "oscillation" do you mean a vibration in the rotor system or a movement of the airframe?
...
Forum: Rotorheads
4th Sep 2002, 17:39
Replies: 21
Views: 2,248
Posted By tgrendl

Does this aircraft hover pefectly level? ...

Does this aircraft hover pefectly level?

Will adjusting your CG plotting to the likely nose up attitude in a hover come up with the company figures?

Good question
Forum: Rotorheads
9th Jul 2002, 04:27
Replies: 8
Views: 1,723
Posted By tgrendl

On the 222 it's actually a pitch up or a rollleft...

On the 222 it's actually a pitch up or a rollleft that induces the transient torque.

Once the disc has established it's new position the transient portion of the torque goes away.

Shawn could...
Forum: Rotorheads
5th Jul 2002, 15:08
Replies: 111
Views: 11,413
Posted By tgrendl

On the visual side of things..... We have to...

On the visual side of things.....

We have to have two way radio contact with the ground.

They have to look for wires, obstacles, wind direction and a suitable (100x100ft) landing zone.

If...
Forum: Rotorheads
4th Jul 2002, 16:37
Replies: 7
Views: 1,021
Posted By tgrendl

:cool: :cool: :) :) :D :D Thank you very...

:cool: :cool: :) :) :D :D

Thank you very much !!!!
Forum: Rotorheads
20th Jun 2002, 16:14
Replies: 27
Views: 4,142
Posted By tgrendl

Bronx, Floyd Bennet field, what history. ...

Bronx,

Floyd Bennet field, what history.

I'd suggest making a short list then talking and visiting operators of the type to determine true operating costs.

Then work out a short term lease...
Forum: Rotorheads
12th Jun 2002, 14:07
Replies: 2
Views: 811
Posted By tgrendl

You can run the numbers out: time to climb,...

You can run the numbers out: time to climb, ground speed, fuel flow rates etc but we've found the fifty mile rule works pretty well.

If your going less then fifty NM a large climb's not worth it,...
Forum: Rotorheads
9th Jun 2002, 16:40
Replies: 392
Views: 86,551
Posted By tgrendl

Great thread, Nick, thanks for the charts...

Great thread,

Nick, thanks for the charts and especially the picture of the little midget helo on your site.

Imagining myself as very small and inside the little helo in the picture I was...
Forum: Rotorheads
31st May 2002, 14:42
Replies: 32
Views: 7,667
Posted By tgrendl

Hopes for a speedy recovery for all involved. ...

Hopes for a speedy recovery for all involved.


Watching the video it appears the pilot intentionally avoided the area occupied by ground personnel/ rescuers to his (or her) own detriment.
...
Forum: Rotorheads
29th May 2002, 15:25
Replies: 13
Views: 989
Posted By tgrendl

Overlapping rotors, not intermeshing, right? ...

Overlapping rotors, not intermeshing, right?


(Two) 2 bladed rotor heads

Overlap blades less then 65%

Stack one higher by 3 feet or so depending on blade flex etc

The center portion will...
Forum: Rotorheads
27th Mar 2002, 21:54
Replies: 1
Views: 516
Posted By tgrendl

Post On a Hiller 12(with soloy) the blades are...

On a Hiller 12(with soloy) the blades are controlled by two paddles set near the inboard portion of the disc. The cyclic moves, the paddles move and then the blades move.. .. .The paddles are very...
Forum: Rotorheads
23rd Mar 2002, 08:40
Replies: 7
Views: 691
Posted By tgrendl

Cool Thanks for the good ideas so far,. .. .I'll drop...

Thanks for the good ideas so far,. .. .I'll drop by Tiger helos and the museum at super mare.. .. .We'll be in south wales and the trip doesn't have any flying built into it yet, mostly hiking and...
Forum: Rotorheads
22nd Mar 2002, 10:33
Replies: 19
Views: 733
Posted By tgrendl

Post Good thread,. .. .Similarly if a failure mode of...

Good thread,. .. .Similarly if a failure mode of the transmission was causing the rrpm to head towards.. say 75% and you were at 2,000 feet.... .. .Right 45 degree spiralling downward turns until...
Forum: Rotorheads
20th Mar 2002, 22:35
Replies: 7
Views: 691
Posted By tgrendl

Cool Vacation in the UK

I'm going to the UK (centered in Wales) for vacation in april. Any good ideas on what to see/do? Will be there from the 10th to the 16th.. .. .Factory tours available?. .. .POCs ?. .. .Thanks for any...
Forum: Rotorheads
20th Mar 2002, 03:29
Replies: 345
Views: 30,095
Posted By tgrendl

Post Lu,. .. .Like your comments most times, always...

Lu,. .. .Like your comments most times, always make me think a bit.. .. .The Apache stuff is off though.. .. .Attack helos are not designed to "fight the enemy up close" they are designed to kill the...
Forum: Rotorheads
15th Mar 2002, 02:33
Replies: 28
Views: 1,992
Posted By tgrendl

Post Shawn,. .. .All the polish instrument approaches...

Shawn,. .. .All the polish instrument approaches are shot from the opposite seat.
Forum: Rotorheads
25th Feb 2002, 20:45
Replies: 1,304
Views: 593,917
Posted By tgrendl

Post Hone 22 I think that statistically most...

Hone 22

I think that statistically most engine failures happen within 100 hours of rebuild/reman. If the aircraft went in without the problem you mention and came out not quite right it's a cause...
Forum: Rotorheads
24th Feb 2002, 08:50
Replies: 1,304
Views: 593,917
Posted By tgrendl

Post Hone 22 Overhauled recently scares me with...

Hone 22

Overhauled recently scares me with that problem coming up.

Be carefull
Forum: Rotorheads
23rd Feb 2002, 18:57
Replies: 1,304
Views: 593,917
Posted By tgrendl

Post Look to see if you're getting coking also. When...

Look to see if you're getting coking also. When you shut down try to turn the blades back gently. If they don't want to go freely or are stuck you've probably got a coking problem in the motor.

If...
Forum: Rotorheads
30th Jan 2002, 19:14
Replies: 1,031
Views: 221,919
Posted By tgrendl

Post Nr, The valley route has more chance of delaying...

Nr, The valley route has more chance of delaying you because of weather but is nice if it's clear.

The other item to watch for is winds from the north if you're heading towards Las Vegas. As you...
Forum: Rotorheads
21st Nov 2001, 21:56
Replies: 267
Views: 46,599
Posted By tgrendl

Post Dave, Heedm, Nick, Lu Great work once again...

Dave, Heedm, Nick, Lu

Great work once again throwing all the ideas up on the table and letting them battle themselves out.

Being what I would call "slow" I look for the simple proofs to...
Forum: Rotorheads
3rd Nov 2001, 21:16
Replies: 15
Views: 1,359
Posted By tgrendl

Post Lu, Nice post. It's good to see your...

Lu,

Nice post. It's good to see your comments on the board, keep it up.

Back to the coal mine for me
Forum: Rotorheads
27th Oct 2001, 19:11
Replies: 255
Views: 109,736
Posted By tgrendl

Post Not sure about the rotorway but the Cobra pitches...

Not sure about the rotorway but the Cobra pitches nose up in engine failures above 120 knots.

I vaguely remember it had to do with the rotor system at that moment producing more drag then the...
Forum: Rotorheads
27th Oct 2001, 11:33
Replies: 181
Views: 28,117
Posted By tgrendl

Post Helmet, In seven (above) I think the correct...

Helmet,

In seven (above) I think the correct sequence of events would be slightly different.

The nose would yaw to the right.

As the barn door side of the fuselage becomes exposed to the...
Forum: Rotorheads
25th Oct 2001, 20:41
Replies: 26
Views: 3,812
Posted By tgrendl

Post I would think that the key descriptive phrase in...

I would think that the key descriptive phrase in use here would be flight manual hovering limits.

Are we going to go hover around the airfield or are we taking off?

Line up with 27, takeoff and...
Forum: Military Aviation
18th Oct 2001, 19:53
Replies: 68
Views: 2,953
Posted By tgrendl

Post Both seats in the aircraft can do both jobs but...

Both seats in the aircraft can do both jobs but it is optimized to fly from the back and shoot/nav from the front.

I'm sure there are really excellent tornado navs that could go through the...
Forum: Rotorheads
18th Oct 2001, 10:53
Replies: 8
Views: 902
Posted By tgrendl

Post Well done. :cool:

Well done. :cool:
Forum: Rotorheads
12th Oct 2001, 20:42
Replies: 1
Views: 607
Posted By tgrendl

Post Qualityman, I had read about a 109 (at...

Qualityman,

I had read about a 109 (at speed) experiencing retreating blade stall with the appropriate roll and pitch. This came on quite fast and before the pilot could react the aircraft rolled...
Forum: Rotorheads
9th Oct 2001, 20:36
Replies: 8
Views: 405
Posted By tgrendl

Post Ancient, I would suggest that a public forum...

Ancient,

I would suggest that a public forum is not the place to air what steps have been taken to increase security.

If the British government is willing to give a tour then they must be very...
Forum: Rotorheads
8th Oct 2001, 19:38
Replies: 26
Views: 3,489
Posted By tgrendl

Post Vfrpilotpb, On many of their heavy lifters...

Vfrpilotpb,

On many of their heavy lifters the engines are the limiting factor. The gearbox design,
(actually the torque transmission design)has more stepped inputs then western designs.

I...
Forum: Rotorheads
11th Sep 2001, 06:53
Replies: 15
Views: 1,298
Posted By tgrendl

Post Heedm, I believe the equipment you are...

Heedm,

I believe the equipment you are usings program will be set up for a particular hover height.

I don't think that the Rads and chadwick 8500c and above care too much about 5 feet to 50...
Forum: Rotorheads
11th Sep 2001, 06:29
Replies: 65
Views: 5,115
Posted By tgrendl

Post Nick, I believe we're after the same data...

Nick,

I believe we're after the same data but going about it in different ways.

The reason I use the "don't touch the collective" idea is that it is a very big bell going off when you're...
Forum: Rotorheads
10th Sep 2001, 20:59
Replies: 16
Views: 2,813
Posted By tgrendl

Post In late 85 early 86 the apaches were just being...

In late 85 early 86 the apaches were just being fielded to operational units.

One of the small problems that had gotten by all the testing regimes had to do with the cannon.

When firing the...
Forum: Rotorheads
10th Sep 2001, 20:43
Replies: 65
Views: 5,115
Posted By tgrendl

Post Heedm, I just got back, missed the...

Heedm,

I just got back, missed the fireworks.

Your point about being power limited and how to work with that is well taken and just about takes this around full circle. It's a much more...
Showing results 1 to 35 of 75
 
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