Am I emotionally invested? Or just asking questions that adequately parry baseless claims?

Draw the polar and answer your own question. Yes? Or if not, based on that information tell us why? Or if you can't draw the necessary polar theoretically, and or do not understand the implications is that the place to start before commenting?

Changing direction. How is the Audi Raptor going to outperform the Iv-p I owned with 350hp that weighs 1000lbs less empty. 260kts lop at reasonable temps at 15.5 gph. It goes about 1250 nm on 96 gallons with an hour of reserves. I can say that the wing loading of the Iv requires above average pilot skills. The raptor will require supreme piloting skills.

That belt drive is horrifying , any other applications this system has been successful in?

Nope, since I earned my aerospace engineering degree from a real university, I was able to write down actual numbers and results and I didn’t need to waste space writing down formulas and definitions from a Google search.

How much brake hp will it take to move that airframe at 300 ktas at FL240-280?

How many gallons per hour will it take to produce that hp?

How much will the fuel weigh for a 3600 nm range at 300 knots? At 200 knots?

It is not particularly difficult to estimate the range of likely answers for each of these, assuming you know what you are doing.

Next, do the answers above seem realistic?

Is it likely the engine he chose will be able to produce that power with a reasonable lifespan?

Can the airframe carry the necessary weight of fuel and volume of fuel?

If you do this exercise, you will understand why people are skeptical and why no one else has built a plane with anything close to the promised performance despite obvious market demand for such a plane.

Changing direction. How is the Audi Raptor going to outperform the Iv-p I owned with 350hp that weighs 1000lbs less empty. 260kts lop at reasonable temps at 15.5 gph. It goes about 1250 nm on 96 gallons with an hour of reserves. I can say that the wing loading of the Iv requires above average pilot skills. The raptor will require supreme piloting skills.

That belt drive is horrifying , any other applications this system has been successful in?

We calculate/estimate with drag coefficients, polars are just plots of the resulting equations. FYI, Your fixation with polars was one of the red flags that you didn’t likely know what you were talking about.

As for your second point, yes, if you make completely unrealistic assumptions about the drag, it is easy to show how it will exceed 300 knots on less than 15 gallons per hour. Even then, the 3600 nm range is still going to require a significant amount of fuel. Around 200 gallons or 1400 lbs with reserves. Even if he knocks 1000 lbs off his empty weight you are still not carrying full fuel and 4 people with a reasonable wing loading. Bigger wing makes the drag go up, so weight is a critical factor. You can argue the max range is at a much lower speed and that means less fuel required, but is an 18 hour flight time reasonable? More than that? But again, we started with an unrealistic assumption so these are all fairytale numbers to begin with.

With a realistic drag assumption, fuel burn at 300 knots climbs into the 20’s and everything else gets unreasonable really fast. <——- [ Hint: I just gave you what you need to know to back into a close approximation of my best case drag estimate and plot the polar you want to see.]

1.) Is the boundary level airflow velocity over the fuselage of the IV-P higher or lower than the same over the Raptor?

2.) Why?

3.) Implications to parasitic drag?

4.) Parasitic drag is what percentage of total drag?

5.) Parasitic drag increases is linearly with speed?

Next.

Am I emotionally invested? Or just asking questions that adequately parry baseless claims?

Draw the polar and answer your own question. Yes? Or if not, based on that information tell us why? Or if you can't draw the necessary polar theoretically, and or do not understand the implications is that the place to start before commenting?

Good question. You on the exploration, production, or transport side of things? What operators you working for? A few of the folks from that industry (a hundred or so) are in my contacts on my linkedin profile.)

I worked in the Eagle Ford (mostly in the valley North of Laredo) and the Permian/Bone Springs/Wolfcamp/Sprayberry on the fracking/water recycling side.

https://www.linkedin.com/in/chris-close-2165b746/

You'll get a kick out this. A vid I made right before the last bust. 30K views.. first try. :-)

https://www.youtube.com/watch?v=irFKLlpPCp4&t=7s

Inversions, polars and the Socratic method is a good way to analyze aircraft performance?

Good question. You on the exploration, production, or transport side of things? What operators you working for? A few of the folks from that industry (a hundred or so) are in my contacts on my linkedin profile.)

I worked in the Eagle Ford (mostly in the valley North of Laredo) and the Permian/Bone Springs/Wolfcamp/Sprayberry on the fracking/water recycling side.

https://www.linkedin.com/in/chris-close-2165b746/

You'll get a kick out this. A vid I made right before the last bust. 30K views.. first try. :-)

https://www.youtube.com/watch?v=irFKLlpPCp4&t=7s

Who thinks that this Chris guy may be related to the Raptor?
Smart: for sure.
Invested: For sure
Related... Hum...

Inversions, polars and the Socratic method is a good way to analyze aircraft performance?

Who thinks that this Chris guy may be related to the Raptor?
Smart: for sure.
Invested: For sure
Related... Hum...