22 Dec 2025, 06:55 [ UTC - 5; DST ]
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die  Posted: 25 Oct 2019, 10:46 |
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Joined: 05/01/14
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Location: Операционный офис КГБ
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Username Protected wrote: v8 oem conversion with some history, 'OPERATING HORSEPOWER' 4,500 rpms http://www.v8seabee.com/conversion-kits ... mance.htmlYes, it is derated to new max output at 75% so max cruise power is around 75% of 75% or 56% of the max power in automotive use. Gee, I wonder why they would do that.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 13:23 |
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Joined: 02/25/16
Posts: 288
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Location: Tupelo, MS
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Username Protected wrote: v8 oem conversion with some history, 'OPERATING HORSEPOWER' 4,500 rpms http://www.v8seabee.com/conversion-kits ... mance.htmlYes, it is derated to new max output at 75% so max cruise power is around 75% of 75% or 56% of the max power in automotive use. Gee, I wonder why they would do that.
Probably the same reason they don't run the Franklins at 4500rpm
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 13:50 |
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Joined: 03/11/15
Posts: 181
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Company: Trailhead Partners
Location: Austin, TX
Aircraft: 182
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Username Protected wrote: For all of the folks talking/speaking/ruminating/espousing theories/thinking about range/weight/cruise speed/take off distance/ceiling/stall speed...
Curious to hear
1.) What you think the biggest two limiting factors are for each?
And once those are correctly identified for each case
2.) What the percent of total drag is for induced vs parasitic for each case?
And once that is identified
3.) How each of the two factors identified in 1 above either contribute or are not mathematically a factor to each of the items in 2 above.
And once that is figured out
3.) What are the implications?
4.) And if this is not the correct approach to think about this problem.. why not? Chris- you’re knowledgeable and have endless sticks to poke holes in the thinkings presented here. Perhaps you could tell us how fast/far/high you think Raptor will fly based on the current powerplant and configuration?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 13:54 |
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Joined: 05/11/10
Posts: 13425
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Location: Indiana
Aircraft: Cessna 185
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Username Protected wrote: For all of the folks talking/speaking/ruminating/espousing theories/thinking about range/weight/cruise speed/take off distance/ceiling/stall speed...
Curious to hear
1.) What you think the biggest two limiting factors are for each?
And once those are correctly identified for each case
2.) What the percent of total drag is for induced vs parasitic for each case?
And once that is identified
3.) How each of the two factors identified in 1 above either contribute or are not mathematically a factor to each of the items in 2 above.
And once that is figured out
3.) What are the implications?
4.) And if this is not the correct approach to think about this problem.. why not? You seem to think this is an undergraduate class and you're the TA. I doubt anyone wants to take your quiz, as the reward for acing it is pretty small. Are you posting to BT using your real name?
_________________
Stu F.
"A cynic is a man who knows the price of everything and the value of nothing."
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:11 |
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Joined: 10/06/19
Posts: 139
Post Likes: +45
Company: Water Cleaners
Aircraft: Pilatus PC-12 NG
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Username Protected wrote: For all of the folks talking/speaking/ruminating/espousing theories/thinking about range/weight/cruise speed/take off distance/ceiling/stall speed...
Curious to hear
1.) What you think the biggest two limiting factors are for each?
And once those are correctly identified for each case
2.) What the percent of total drag is for induced vs parasitic for each case?
And once that is identified
3.) How each of the two factors identified in 1 above either contribute or are not mathematically a factor to each of the items in 2 above.
And once that is figured out
3.) What are the implications?
4.) And if this is not the correct approach to think about this problem.. why not? Chris- you’re knowledgeable and have endless sticks to poke holes in the thinkings presented here. Perhaps you could tell us how fast/far/high you think Raptor will fly based on the current powerplant and configuration?
Am I poking holes or just asking questions that when put to paper on a graph (i.e. you do the math) with a correct understanding of how things actually work, show the questions to come from the wrong perspective, and or are ignorant of the causes of and then the implications of weight on induced drag vs parasitic drag? And more importantly what the ratio of parasitic to induced drag is at speed and altitude? 100% of the folks making negative comments about that here CAN NOT draw that graph. If you look back at the profiles of the folks that have up-voted my comments (and their experience in their respective flight regimes) things become clearer.
To answer your very wise and thoughtful "perhaps".... I don't know for sure. But what I believe is he will be within 75% of his range number and 90%++ of his cruise TAS speed if.....
The powerplant/redrive system holds together. Think that is the single biggest risk. And I am feeling better and better about that as he sorts things out.
Have zero concerns about the ship flying/performing above and beyond what are acceptable for any one off experimental.
And think those concerns presented in this forum, within the scope defined, are both normal for folks not in the space and overblown.
Think versions 2-10 will be lighter, cleaner, more refined, and cheaper.
Think after that it is off to the races if the previous hurdles can be cleared. Big if... but the problems with that are not the ones identified here. And if I am right on my projections he blows the doors off anything light single available. Truly revolutionary in the space. That is what is being missed by most... and for the reasons I pointed out above.
Outside of the the technical issues, think the biggest concern/risk is the rapidly deterioration in the global macro economic environment and the known knock on to the light aviation space in general.
Last edited on 25 Oct 2019, 14:19, edited 2 times in total.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:13 |
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Joined: 09/04/09
Posts: 6203
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Location: Doylestown, PA (KDYL)
Aircraft: 1979 Baron 58P
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Username Protected wrote: Are you posting to BT using your real name? Interesting....seems to be Troll like behavior 
_________________
Rick Witt
Doylestown, PA
& Destin, FL
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:21 |
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Joined: 11/22/12
Posts: 2942
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Location: Lynnwood, WA (KPAE)
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Username Protected wrote: he will be within 75% of his range number and 90%++ of his cruise TAS speed if.....The powerplant/redrive system holds together. That's 2700 nm range and 270 kts cruise. Sounds like a wager. Who wants the other side?
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:39 |
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Joined: 02/25/16
Posts: 288
Post Likes: +170
Location: Tupelo, MS
Aircraft: 182R
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My guess... Velocity XL-RG performance, at best.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:48 |
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Joined: 10/06/19
Posts: 139
Post Likes: +45
Company: Water Cleaners
Aircraft: Pilatus PC-12 NG
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Username Protected wrote: For all of the folks talking/speaking/ruminating/espousing theories/thinking about range/weight/cruise speed/take off distance/ceiling/stall speed...
Curious to hear
1.) What you think the biggest two limiting factors are for each?
And once those are correctly identified for each case
2.) What the percent of total drag is for induced vs parasitic for each case?
And once that is identified
3.) How each of the two factors identified in 1 above either contribute or are not mathematically a factor to each of the items in 2 above.
And once that is figured out
3.) What are the implications?
4.) And if this is not the correct approach to think about this problem.. why not? You seem to think this is an undergraduate class and you're the TA. I doubt anyone wants to take your quiz, as the reward for acing it is pretty small. Are you posting to BT using your real name?
No.. I know that answering the questions above refute 100% of the BS "statements of fact" being put forward by folks who are
1.) Too ignorant of the facts themselves to put forward a cogent argument against the issues at hand
2.) Are highly educated in other areas of competence and (wrongly) assume that grants them real competence in this arena
3.) Have a massive over representation of the slice of the population as defined by the google news search terms ""Doctor" "fatal" "plane""
https://www.google.com/search?q=%22doct ... 22plane%22
You whip out the the ad hominems all day long brother. I will stick with the implications of the questions you ask, the comments you make, and the results of the above search. All which are inexorability linked in both, my mind, and what actually happens in the real world. You can take that either as an attack (even though it is substantiated with real world headlines and NTSB statistics) or a plea to pull your head out before you join that rank and file. I would BOTH, greatly prefer the latter, AND understand it is completely out of my control.
Perhaps something to think about before you next yell "Clear Prop."
Last edited on 25 Oct 2019, 14:52, edited 1 time in total.
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:52 |
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Joined: 05/11/10
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Location: Indiana
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Username Protected wrote: You whip out the the ad hominems all day long brother. I'm not your brother and this sentence is ironic. Are you posting on BT with your real name?
_________________
Stu F.
"A cynic is a man who knows the price of everything and the value of nothing."
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Post subject: Re: Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Die Posted: 25 Oct 2019, 14:53 |
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Joined: 10/06/19
Posts: 139
Post Likes: +45
Company: Water Cleaners
Aircraft: Pilatus PC-12 NG
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Username Protected wrote: You whip out the the ad hominems all day long brother. I'm not your brother and this sentence is ironic. Are you posting on BT with your real name?
Yes.
In so much as the merits of each of our cases have been made in this forum and have been clearly put forward I think we have
1) Exhausted the usefulness of debating each other here in this forum.
2.) Made clear each of our relatives points and what underpins them.
If you feel the need to interact further you are welcome to contact me directly. cclose@watercleanersinc.com
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