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Search: Posts Made By: dClbydalpha
Showing results 1 to 35 of 217
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Forum: Rotorheads
17th Jan 2019, 17:14
Replies: 111
Views: 82,761
Posted By dClbydalpha

The maintenance procedure calls up a ground run...

The maintenance procedure calls up a ground run after the wash, so in terms of procedure then I suppose yes.
Forum: Rotorheads
16th Jan 2019, 18:36
Replies: 111
Views: 82,761
Posted By dClbydalpha

I thought it said that PM did have his hand on...

I thought it said that PM did have his hand on the collective. The issue being not noticing that it was already high.
Forum: Rotorheads
12th Dec 2018, 11:06
Replies: 1,254
Views: 704,117
Posted By dClbydalpha

The servo acts on the control rod, visualise that...

The servo acts on the control rod, visualise that as fixed. The feedback arm creates an angle between the control rod end position and the input control position. This acts on the servo control. ...
Forum: Rotorheads
7th Dec 2018, 22:01
Replies: 1,254
Views: 704,117
Posted By dClbydalpha

Out of interest where does the 130rpm come from? ...

Out of interest where does the 130rpm come from?
The only other time I've seen data from an event like this it was about 120 deg/sec.
Forum: Rotorheads
7th Dec 2018, 12:29
Replies: 150
Views: 23,955
Posted By dClbydalpha

Caveat that this is my personal WAG. If there is...

Caveat that this is my personal WAG. If there is a will, I reckon 18 months to free flight. Realistically 3 years to an available production item. 5 years to realise the advantages?
The thing I...
Forum: Rotorheads
7th Dec 2018, 09:03
Replies: 1,254
Views: 704,117
Posted By dClbydalpha

I'm a big proponent of the capabilities of...

I'm a big proponent of the capabilities of avionics. But at this point it has lost a major effector. While the auto-stab may have a mode that can help level, it could also help relieve torque, but...
Forum: Rotorheads
6th Dec 2018, 21:43
Replies: 150
Views: 23,955
Posted By dClbydalpha

I'm struggling to understand your interpretation...

I'm struggling to understand your interpretation of "continuous". The motors I have encountered have a continuous rating, a five minute max rating (~125%) and a five second emergency rating...
Forum: Rotorheads
6th Dec 2018, 17:30
Replies: 150
Views: 23,955
Posted By dClbydalpha

So at least you now acknowledge the existence of...

So at least you now acknowledge the existence of a suitable motor with an appropriate continuous rating.

Now where's that like button
Forum: Rotorheads
6th Dec 2018, 16:07
Replies: 150
Views: 23,955
Posted By dClbydalpha

The Siemens motor in the Extra 330 LE is rated at...

The Siemens motor in the Extra 330 LE is rated at 260 kW continuous and is 50kg. But don't let facts get in the way of plucking random numbers out of thin air.
Forum: Rotorheads
5th Dec 2018, 18:17
Replies: 150
Views: 23,955
Posted By dClbydalpha

At what point have I ever proposed an ETR as a...

At what point have I ever proposed an ETR as a solution to tail rotor failure?

Why do you say I don't consider system failure or loss of power? The motor will meet the required failure rate as...
Forum: Rotorheads
5th Dec 2018, 16:02
Replies: 150
Views: 23,955
Posted By dClbydalpha

Once you've redesigned that much I suspect there...

Once you've redesigned that much I suspect there are much better configurations than the conventional layout.


I'm not sure there would be a need. I can't recall whether Project Zero was.
Forum: Rotorheads
5th Dec 2018, 14:23
Replies: 150
Views: 23,955
Posted By dClbydalpha

Who said it was groundbreaking? NOTAR has its...

Who said it was groundbreaking? NOTAR has its issues and advantages. As does Tandem, and coaxial, and contra... It doesn't have to be groundbreaking to be useful. This thread started because one...
Forum: Rotorheads
5th Dec 2018, 11:38
Replies: 150
Views: 23,955
Posted By dClbydalpha

As in " may you live In interesting times" 😁. ...

As in " may you live In interesting times" 😁.

The ETR generation is not exclusive with the rest of the generation system. For a lot of the time the ETR will not be at peak load, when it is, other...
Forum: Rotorheads
5th Dec 2018, 10:08
Replies: 150
Views: 23,955
Posted By dClbydalpha

Nothing is straightforward. The fact that these...

Nothing is straightforward. The fact that these innovations are even happening shows the will to move forward. ETR is one of a number of initiatives as you say.

Real advantages may be gained in...
Forum: Rotorheads
5th Dec 2018, 09:49
Replies: 150
Views: 23,955
Posted By dClbydalpha

The idea that because something is new it is...

The idea that because something is new it is somehow less capable or even a "fantasy" is also false. Massive advancements have been made in electric technology. Serious research began a decade ago,...
Forum: Rotorheads
5th Dec 2018, 09:10
Replies: 150
Views: 23,955
Posted By dClbydalpha

And for others it allows them to operate in...

And for others it allows them to operate in conditions not previously possible and therefore increasing usability of their asset. As a Customer, you take your choice.
Forum: Rotorheads
4th Dec 2018, 21:47
Replies: 150
Views: 23,955
Posted By dClbydalpha

Yes, why wouldn't it? Simply changing the means...

Yes, why wouldn't it? Simply changing the means of providing the rotation won't reduce performance. If anything it gives the potential for greater control.

Cooling high performance motors is...
Forum: Rotorheads
4th Dec 2018, 18:54
Replies: 150
Views: 23,955
Posted By dClbydalpha

90 kVA is about 40 kg already in use. Full RIPS...

90 kVA is about 40 kg already in use. Full RIPS takes some juice too.
Forum: Rotorheads
4th Dec 2018, 17:35
Replies: 150
Views: 23,955
Posted By dClbydalpha

Better control of noise footprint. Less moving...

Better control of noise footprint.
Less moving parts.
Less maintenance.
Less unfriendly lubricant.
No need for TRDS alignment.
More freedom in tail rotor design compromise.
More options in MGB...
Forum: Rotorheads
4th Dec 2018, 14:10
Replies: 150
Views: 23,955
Posted By dClbydalpha

Crab, I think the FW will see commercial benefits...

Crab, I think the FW will see commercial benefits sooner, as the efficiency improvement is possibly greater.

The MGB already drives the TRDS and so no real added complexity... in fact layout could...
Forum: Rotorheads
4th Dec 2018, 12:47
Replies: 1,254
Views: 704,117
Posted By dClbydalpha

If things are wearing unexpectedly then it may...

If things are wearing unexpectedly then it may leave traces in the lubricant that can be found by analysis.
Forum: Rotorheads
4th Dec 2018, 12:23
Replies: 150
Views: 23,955
Posted By dClbydalpha

It's not an overnight solution, we started many...

It's not an overnight solution, we started many years ago, it just seems that very few people recognise it.

This thread isn't about the All Electric Rotorcraft it is about an Electric Tail Rotor...
Forum: Rotorheads
4th Dec 2018, 11:51
Replies: 150
Views: 23,955
Posted By dClbydalpha

Not sure where you are plucking your numbers...

Not sure where you are plucking your numbers from. 1 hp / lb electric motors have been available for over a decade. 3 hp / lb electric motors have been flying for a couple of years. Changes your...
Forum: Rotorheads
3rd Dec 2018, 17:17
Replies: 150
Views: 23,955
Posted By dClbydalpha

The simple answer is the advances in technology...

The simple answer is the advances in technology driven by the hybrid and electric vehicle markets over the past decade now make production of such a system feasible. The operational environment is...
Forum: Rotorheads
3rd Dec 2018, 12:47
Replies: 150
Views: 23,955
Posted By dClbydalpha

That's exactly what is being asked by the...

That's exactly what is being asked by the authorities. As well as a strive for efficiency, the push to an ETR is environmental. It can make an impact on the noise footprint, critical in approving...
Forum: Rotorheads
3rd Dec 2018, 12:26
Replies: 150
Views: 23,955
Posted By dClbydalpha

Firstly, why wouldn't it work for an ETR? ...

Firstly, why wouldn't it work for an ETR?
Secondly, why do you want the tail rotor driven in "perfect synchronisation" with the main rotor?
Forum: Rotorheads
2nd Dec 2018, 12:49
Replies: 150
Views: 23,955
Posted By dClbydalpha

That depends on the advantages gained, I...

That depends on the advantages gained, I personally think that an ETR brings a lot to the table in terms of efficiency and noise.

Motors, generators and actuators are already used, so we know how...
Forum: Rotorheads
2nd Dec 2018, 12:34
Replies: 150
Views: 23,955
Posted By dClbydalpha

Let's not get too ambitious. Simply replacing...

Let's not get too ambitious. Simply replacing the mechanical drive gives enough options for now.

If we're blue sky thinking I'd look at a ducted fan that could rotate to become a pusher.
Forum: Rotorheads
2nd Dec 2018, 00:02
Replies: 150
Views: 23,955
Posted By dClbydalpha

Or those who have no idea how these magnificent...

Or those who have no idea how these magnificent flying machines are designed or certified.
Forum: Rotorheads
1st Dec 2018, 22:42
Replies: 150
Views: 23,955
Posted By dClbydalpha

How much did you pay for it? What kind of...

How much did you pay for it? What kind of certification did you get with it?
Forum: Rotorheads
1st Dec 2018, 19:44
Replies: 150
Views: 23,955
Posted By dClbydalpha

ShyTorque, my apologies, ROM is Rough Order of...

ShyTorque, my apologies, ROM is Rough Order of Magnitude. I ask because this determines the power demand at a critical phase.
Nadar seems to have implied that auto with an ETR would be different to...
Forum: Rotorheads
1st Dec 2018, 19:07
Replies: 150
Views: 23,955
Posted By dClbydalpha

Fully agree with that! But having control of both...

Fully agree with that! But having control of both is not a bad thing.
Forum: Rotorheads
1st Dec 2018, 19:05
Replies: 150
Views: 23,955
Posted By dClbydalpha

Accepted, but say as a ROM % of that in powered...

Accepted, but say as a ROM % of that in powered hover?

I also wonder why the assumption that an electric tail rotor wouldn't work in autorotation?
Forum: Rotorheads
1st Dec 2018, 18:47
Replies: 150
Views: 23,955
Posted By dClbydalpha

Nadar, there are efficiencies to be gained by the...

Nadar, there are efficiencies to be gained by the ability to vary tail rotor speed. It allows a designer to move the compromise points. Plus as I stated before the ability to tailor the noise...
Forum: Rotorheads
1st Dec 2018, 17:16
Replies: 150
Views: 23,955
Posted By dClbydalpha

My point exactly ... the technology is already...

My point exactly ... the technology is already available. The concept of an electric tail rotor is not a reason to dismiss someone's statements.
Showing results 1 to 35 of 217
 
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