19 Apr 2024, 10:20 [ UTC - 5; DST ]
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 10 Jan 2021, 13:54 |
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Joined: 05/01/14 Posts: 8787 Post Likes: +13491 Location: Операционный офис КГБ
Aircraft: TU-104
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Username Protected wrote: And this is why most people think this is going to end badly. Not understanding that you can't correct static port errors in software (well... unless you know exactly what the error is at every airspeed and attitude), thinking that you can do anything you want just because it's experimental and even considering flaps on the main wing of a canard aircraft show an incredible lack of understanding. I can certainly understand how someone without an aerospace background might not understand these things to begins with, but if you decide to design a plane and spend YEARS working on it, how do you fail to learn such basic concepts? A quick google of “why don’t canard airplanes have flaps” would probably deliver some pretty good answers. Understanding pitot static systems takes a bit more effort, but I am sure there is plenty of info online, if not, get a textbook and consider an online engineering class. Peter had plenty of time to do things right, but he insists on the the slower and more expensive path of doing everything wrong. I just hope he doesn’t kill anyone else before it’s over.
_________________ Be kinder than I am. It’s a low bar. Flight suits = superior knowledge
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 18 Jan 2021, 03:13 |
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Joined: 06/17/14 Posts: 5003 Post Likes: +1949 Location: KJYO
Aircraft: C-182, GA-7
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Is the 90 degree fitting he is demoing wise? That looks like the turbulence of from the viscous oil could be a risk. A would a couple of 45 degree fittings be better for flow?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 18 Jan 2021, 18:54 |
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Joined: 05/29/10 Posts: 3909 Post Likes: +1041 Company: Advanced Pilot Seminars Aust. Location: Brisbane Qld Australia
Aircraft: RV-10....ssshhh!
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How does he know he hast static errors? It cannot be checked via a GPS box because you need stable flight while you fly several ground tracks. I have never seen a more unstable ASI in my life That thing pitches and rolls so much it almost makes you motion sick watching it. And I don't get motion sickness, or not easily.
_________________ David Brown
The two best investments you can make, by any financial test, an EMS and APS!
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 18 Jan 2021, 22:19 |
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Joined: 12/28/17 Posts: 773 Post Likes: +369 Company: Bellanca Aircraft Location: Washington, OK
Aircraft: 17-30A
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Username Protected wrote: How does he know he hast static errors? It cannot be checked via a GPS box because you need stable flight while you fly several ground tracks. I have never seen a more unstable ASI in my life That thing pitches and rolls so much it almost makes you motion sick watching it. And I don't get motion sickness, or not easily. I wonder if his pitch sensitivity maybe partially attributed to his control ratio movement, but I was always under the impression canards were unstable to start with.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 18 Jan 2021, 22:31 |
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Joined: 10/07/18 Posts: 2684 Post Likes: +1793 Location: Columbus, Ohio
Aircraft: Baron 58, Lear 35
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Username Protected wrote: How does he know he hast static errors? The altimeter climbs ~200 feet during the takeoff roll. The runway grade doesn’t look that steep.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 18 Jan 2021, 22:53 |
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Joined: 04/24/18 Posts: 727 Post Likes: +340 Location: NYC
Aircraft: ISP Eagle II SR22 g2
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Username Protected wrote: How does he know he hast static errors? It cannot be checked via a GPS box because you need stable flight while you fly several ground tracks. I have never seen a more unstable ASI in my life That thing pitches and rolls so much it almost makes you motion sick watching it. And I don't get motion sickness, or not easily. The altimeter moves hundreds of feet almost instantly with power changes. Watch the altitude indicated on final.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 19 Jan 2021, 08:32 |
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Joined: 05/29/10 Posts: 3909 Post Likes: +1041 Company: Advanced Pilot Seminars Aust. Location: Brisbane Qld Australia
Aircraft: RV-10....ssshhh!
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Sorry, you misunderstood my message, ......I am sure he has static errors as you all explain, but I would suggest you look at your PFD's as you power up too. My point was he has big static errors but how would he know what is what and by how much. He could not do a GPS box because you need straight and level flight and stable airspeed. He cannot achieve that. And the AP is not going to give him any stability as a result. I am surprised there is not an NTSB report by now.
_________________ David Brown
The two best investments you can make, by any financial test, an EMS and APS!
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 20 Jan 2021, 00:10 |
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Joined: 03/15/16 Posts: 450 Post Likes: +346 Location: NC
Aircraft: Looking for one
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Username Protected wrote: Sorry, you misunderstood my message, ......I am sure he has static errors as you all explain, but I would suggest you look at your PFD's as you power up too. My point was he has big static errors but how would he know what is what and by how much. He could not do a GPS box because you need straight and level flight and stable airspeed. He cannot achieve that. And the AP is not going to give him any stability as a result. I am surprised there is not an NTSB report by now. He’s going to fix the static port, redesign it to lose 1000#, fix the cooling issues, fix the undersized/mismatched turbos, determine the performance envelope during production after he flies the 40 hours off.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 20 Jan 2021, 09:05 |
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Joined: 05/29/10 Posts: 3909 Post Likes: +1041 Company: Advanced Pilot Seminars Aust. Location: Brisbane Qld Australia
Aircraft: RV-10....ssshhh!
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Tony........yeah sorry, you are correct. What was I thinking. Having never done any test flying at all......
_________________ David Brown
The two best investments you can make, by any financial test, an EMS and APS!
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 20 Jan 2021, 09:14 |
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Joined: 12/22/07 Posts: 12882 Post Likes: +13295 Company: Midwest Chemtrails, LLC Location: KPTK (SE Michigan)
Aircraft: C205
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Username Protected wrote: My point was he has big static errors but how would he know what is what and by how much. He could not do a GPS box because you need straight and level flight and stable airspeed. He cannot achieve that. How? A static cone is proven technology, cheap, easy and reliable ...
_________________ Life is a DiY project.
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