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12 Aug 2020, 08:26 [ UTC - 5; DST ]


MRM (Honeywell)



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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 17:19 
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Username Protected wrote:
17KW?? You sure about that? A 17 KW generator will power a house....

Not my house. That's about 20hp; certainly a hell of an alternator.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 17:56 
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Username Protected wrote:

But the system has to work with reduced power for descent as well.


Once the aileron flutter rips the wings off, the rate of descent should be more than high enough to make ice accumulation on the way down a non-concern.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 18:16 
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Username Protected wrote:

But the system has to work with reduced power for descent as well.


Once the aileron flutter rips the wings off, the rate of descent should be more than high enough to make ice accumulation on the way down a non-concern.


Maybe, but I prefer to crash to my fiery death with a nice ice-free canard wing.

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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 18:53 
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This is a very interesting conversation...
Somehow you guys are arguing the installation of heated plates on this bird...
Which would imply that this bird would be flying in freezing levels....
:rofl: :whistle: :whiteflag:
:pray:

Let's try to see if this bird can fly first.

Then let's see if it can go above pattern alt.

If it does all this... I would be very impressed.

Icing, is not really on the board just yet....
And yes, it is supposed to be holding pressure at high altitude as well... :lol:

Like someone has said: Fly, Raptor, Fly...
:popcorn:

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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 19:27 
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Username Protected wrote:
The alternator for the system on my plane puts out over 17 kW
17KW?? You sure about that? A 17 KW generator will power a house....
Maybe I did the math wrong. It's 70v, rated for 250a.

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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 21:47 
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The good news is I don't think he is using the deice feature on the prototype. He does have the recirculation to heat the fuel. The bad news more stuff = more pounds. Pretending it flies and makes descent performance numbers. The redesign to get this thing trimmed down would be interesting. I think he would have to kill the pressurization to bring this thing into reality on the weight side. But, then there goes the need for this turbo setup and being able to go fast up high. So, that kills the interest in the project too.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 21:49 
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I think he would have to kill the pressurization to bring this thing into reality on the weight side. But, then there goes the need for this turbo setup and being able to go fast up high. So, that kills the interest in the project too.


bingo


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 02 Dec 2019, 22:16 
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Maybe, but I prefer to crash to my fiery death with a nice ice-free canard wing.


If you shut off the coolant flow to the main wings, there should be enough retained heat mass to keep the canard clear of ice throughout the brief plummet to ground. That said, with most of the fuel in the soon to depart wings, I think you might find the size of the post crash fire, if any, to be disappointing. I would go as far as to bet that the cause of death will not be the fire, and that your estate will have to pay extra for your cremation if that is your desire.

If you are looking for a fiery crash, there are some Eurocopter/Airbus Helicopter products I might recommend over the Raptor.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 03 Dec 2019, 09:25 
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<sarcasm>OMG! Have we exhausted the suplply of green (fonts) yet again?</sarcasm>

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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 03 Dec 2019, 17:15 
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<sarcasm>OMG! Have we exhausted the suplply of green (fonts) yet again?</sarcasm>


I was initially planning to use a green font but decided my post, while morbid in subject matter, might be factually accurate enough to warrant basic black.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 03 Dec 2019, 23:28 
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Just watched the video he posted today. You will all be very happy to know that Peter is addressing the slop in the controls. He found some flex in the belly of the beast and is adding some more weight to stiffin it up. I think its good that he is addressing this stuff. Hopfully it makes this thing safer and better in the end. Raptor 2.0 is going to be needed for sure if he can prove the concept in the prototype.


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 03 Dec 2019, 23:37 
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Username Protected wrote:
Just watched the video he posted today. You will all be very happy to know that Peter is addressing the slop in the controls. He found some flex in the belly of the beast and is adding some more weight to stiffin it up. I think its good that he is addressing this stuff. Hopfully it makes this thing safer and better in the end. Raptor 2.0 is going to be needed for sure if he can prove the concept in the prototype.


Rather large 1/4” 4130 plates.

He’s gonna have to ditch the 2nd gigantic door on the next refinement to lighten it up. Among other things...


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range
PostPosted: 04 Dec 2019, 01:37 
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Username Protected wrote:
Just watched the video he posted today. You will all be very happy to know that Peter is addressing the slop in the controls. He found some flex in the belly of the beast and is adding some more weight to stiffin it up. I think its good that he is addressing this stuff. Hopfully it makes this thing safer and better in the end. Raptor 2.0 is going to be needed for sure if he can prove the concept in the prototype.

Man, this thing is going to get heavy when he uses angle iron everywhere on this flexy airframe. :coffee:


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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 04 Dec 2019, 13:15 
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 Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die
PostPosted: 04 Dec 2019, 13:28 
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Username Protected wrote:
I'm just waiting for someone to take one of those airplanes running electrical current to every leading edge near a thunderstorm and see what happens.
Your wait is over, that would be the 787. Over 900 delivered, flying all over the world, no doubt many have been near thunderstorms, no reports of thunderstorm-related problems.

Didn't know about that, thanks.

As for the other posters, the issue isn't taking an aluminum wing near a thunderstorm. The issue is taking one with a deliberate electric charge running through the leading edge surfaces of the entire plane.

Sorry you missed the difference.

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