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Search: Posts Made By: horlick97
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Forum: Rotorheads
18th Nov 2018, 06:30
Replies: 488
Views: 181,175
Posted By horlick97

What do you think of this idea: To have...

What do you think of this idea:
To have coaxial tandem rotor for the chinook.
The objective is to reduce the rotor diameter, and hence footprint of the helicopter.
With coaxial and the reduced...
Forum: Rotorheads
29th Jan 2018, 11:20
Replies: 15
Views: 4,393
Posted By horlick97

Thanks everyone for all the comments and input. ...

Thanks everyone for all the comments and input.

Regarding this above concept ("to make it pivot around from providing anti-torque at low speed to providing forward propulsion at high speed"), I...
Forum: Rotorheads
28th Jan 2018, 08:11
Replies: 15
Views: 4,393
Posted By horlick97

Chinooks, further upgrade for forward flight in gyroplane mode

I am not an engineer but may I discuss a question.

It is possible to configure the engines of Chinooks to provide forward thrust for forward flight, such that the rotors can be unloaded and even...
Forum: Rotorheads
7th Oct 2014, 11:35
Replies: 9
Views: 4,247
Posted By horlick97

I understand in NOTAR, it employs the principle...

I understand in NOTAR, it employs the principle of Coanda effect to generate the lateral force in the tail boom. So far in the MD models, the tail boom are all circular in its cross section.

My...
Forum: Rotorheads
6th Oct 2014, 11:42
Replies: 9
Views: 4,247
Posted By horlick97

NOTAR

Could I ask what's is the state of development of the NOTAR? I understand it was first instroduced by MD more than 10 years ago.

How does it compare with the conventional tail rotor helicopters...
Forum: Rotorheads
23rd Sep 2014, 14:38
Replies: 10
Views: 5,808
Posted By horlick97

Could the X3 be turned into a gyroplane in...

Could the X3 be turned into a gyroplane in forward flight? this will be like Carter Aviation's heliplane.

Wouldn't that be even more efficient?
Forum: Rotorheads
6th Sep 2014, 03:03
Replies: 10
Views: 5,808
Posted By horlick97

Thanks for the clarifications. It seems to me...

Thanks for the clarifications.
It seems to me that the X3 configuration is a low risk technological progression from the conventional tail rotor configuration.
It is not worse off in terms of...
Forum: Rotorheads
5th Sep 2014, 15:14
Replies: 10
Views: 5,808
Posted By horlick97

I have read about the X3. But, I am still...

I have read about the X3.

But, I am still puzzled on how it works.

At stationary, would the two propellers be providing thrust at opposite directions, with one towards the rear and the...
Forum: Rotorheads
19th Aug 2014, 14:39
Replies: 85
Views: 35,877
Posted By horlick97

Thanks for all the input regarding the...

Thanks for all the input regarding the limitations of the coaxial configuration when you scale it up.

The being the case, the only way to still employ the counter rotating rotors (so as to...
Forum: Rotorheads
16th Aug 2014, 12:30
Replies: 85
Views: 35,877
Posted By horlick97

Thanks KenV for the insightful discussion. ...

Thanks KenV for the insightful discussion.

May I enquire:
What is the factor that limits the X2 configuration to only upto FVL-M? Is it due to the difficulty in having rigid rotors beyond this...
Forum: Rotorheads
2nd Aug 2014, 15:04
Replies: 85
Views: 35,877
Posted By horlick97

It will one of each system. Coaxial:...

It will one of each system.

Coaxial: Either Boeing-Sikorsky or AVX.

Tiltrotor: Either Bell or Karem.

It will be good if award would allow the combination of the features to be...
Forum: Rotorheads
5th Jul 2014, 07:35
Replies: 85
Views: 35,877
Posted By horlick97

Does anyone know the status of the Groen Brothers...

Does anyone know the status of the Groen Brothers Gyrolifter concept? Would this not be a promising concept also? In fact, would the Fairley Rotordyne not have proven the concept?
Forum: Rotorheads
1st Jul 2014, 09:20
Replies: 85
Views: 35,877
Posted By horlick97

Thanks riff_raff. I learnt something new. ...

Thanks riff_raff. I learnt something new.

The ULOR is interesting, though I must acknowledge I do not understand fully by the 'offset'. Anyway, I wonder why boeing did not offer this or the JMR....
Forum: Rotorheads
28th Jun 2014, 15:07
Replies: 85
Views: 35,877
Posted By horlick97

Thanks Henra. It is interesting to learn...

Thanks Henra.

It is interesting to learn that the tandem's rotors need not be vertically separated due to the axis offset. Though I note this configuration would only be applicable within a very...
Forum: Rotorheads
21st Jun 2014, 08:23
Replies: 85
Views: 35,877
Posted By horlick97

Another question I have is what's the difference...

Another question I have is what's the difference between Defiant's forward thrust propellers and AVX's ducted fans?

Wouldn't AVX's split to two ducted fans require and additional...
Forum: Rotorheads
21st Jun 2014, 08:09
Replies: 85
Views: 35,877
Posted By horlick97

Please pardon my ignorance. May I seek some help...

Please pardon my ignorance. May I seek some help on the following:

What's the difference between X2's coaxial and AVX's coaxial?

I read that X2's rotors are rigid. Does that mean AVX's are...
Forum: Rotorheads
13th Jun 2014, 16:30
Replies: 85
Views: 35,877
Posted By horlick97

The largest helicopter in production by the...

The largest helicopter in production by the western world is the Sea Stallion. It employes the typical configuration of having a single main rotor with a tail rotor for counter torque.

The next...
Showing results 1 to 17 of 17


 
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