BeechTalk - BT - Raptor Aircraft 5 Seat Pressurized 3,600 NM Range Diesel

Username Protected · **Posted:** 13 Oct 2020, 09:56

Username Protected wrote:

I’m curious about the elevator hinging he used on the Raptor. With the hinges located well below the canard wouldn’t that change the control surface gap a lot as he changed stick position which would cause it to change pitch control pressure.

Other airplanes hinge ailerons this way but with two linked opposing aileron surfaces it may cancel out the changes in feel. They also have hinges much closer to the bottom surface.

It might be the correct hinging for a flap system but not for a control surface. Did he ever give a good reason for hinging the elevators this way?

Just eyeballing to compare with other successful past canard designs the canard appears to be too short of a span.

I wondered same, but making a "fowler elevator" was apparently how Velocity addresses it, too. Or so I've read.

Username Protected · **Posted:** 13 Oct 2020, 10:14

Yeah we have a whole department of people doing FEA and every time a model is run they go through it and based on experience say this area is real and that one we'll disregard and these others are suspicious but need to be re-meshed in a different way to better understand it.

Anyone who runs a complex model once and thinks they've learned something useful, is either really, really experienced at creating the mesh and boundaries, or is in way over their head.

Username Protected · **Posted:** 13 Oct 2020, 12:02

Velocity has hinges under the canard but much closer to the lower surface.

Peters hinge points look to be about 4 times further from the canard bottom surface which would make the gap changes much greater with deflection.

https://s28490.pcdn.co/wp-content/uploa ... ty-594.jpg

Plus these are not there on the Raptor for pitch feedback.

https://s28490.pcdn.co/wp-content/uploa ... rimtab.jpg

Username Protected · **Posted:** 13 Oct 2020, 14:24

It seems to oscillate pretty bad with very minor if any pitch inputs

Hopefully no one will get hurt and it ends up like this other broken dream discarded behind a museum.

Username Protected · **Posted:** 13 Oct 2020, 14:50

Username Protected wrote:

It seems to oscillate pretty bad with very minor if any pitch inputs

Hopefully no one will get hurt and it ends up like this other broken dream discarded behind a museum.

Foeward sweep like a Hansa Jet

Username Protected · **Posted:** 13 Oct 2020, 15:11

why is he flying from the right seat?

Username Protected · **Posted:** 13 Oct 2020, 15:14

Where is that Vantage jet carcass located?

Username Protected · **Posted:** 13 Oct 2020, 15:15

Username Protected wrote:

why is he flying from the right seat?

Asks the guy from ZS - the raptor is primarily a ground vehicle. What side is the car steering wheel in your country ? Same for Peter’s homeland.

Username Protected · **Posted:** 13 Oct 2020, 15:25

Username Protected wrote:

Where is that Vantage jet carcass located?

He “claims” to be more comfortable from the right seat because he’s a CFI. And he likes the side stick in his right hand.

Woo.

I’ve flown a cirrus from both sides. It takes all of 7 seconds to get used to.

Username Protected · **Posted:** 13 Oct 2020, 15:25

That's about as far as the logic goes.

Michael, he apparently sits on the right because as he says he "feels more comfortable there". He is a CFI, and I believe he probably has more time riding in the right seat than flying in the left. In any case, that's all the explanation that I've ever heard.

Edit: Max, you beat me by seconds! Spot on with the time to adjust, but whatever works for you I guess.

Username Protected · **Posted:** 13 Oct 2020, 16:24

Vantage jet. Ames Iowa?

Username Protected · **Posted:** 13 Oct 2020, 16:37

Username Protected wrote:

It seems to oscillate pretty bad with very minor if any pitch inputs

Hopefully no one will get hurt and it ends up like this other broken dream discarded behind a museum.

That hurts, I was a Vanage Investor. That airplane flew fine, it was just a little bit ahead of its time and like the Starship, the FAA hadn't gotten a grasp on certifying composite airplanes, and guess what. It got heavy.

Username Protected · **Posted:** 13 Oct 2020, 17:35

Username Protected wrote:

Where is that Vantage jet carcass located?

Hickory NC

Username Protected · **Posted:** 13 Oct 2020, 17:41

Username Protected wrote:

why is he flying from the right seat?

Asks the guy from ZS - the raptor is primarily a ground vehicle. What side is the car steering wheel in your country ? Same for Peter’s homeland.

Username Protected · **Posted:** 13 Oct 2020, 19:20

Peter put up a new video. He's planning to add 5 Gal of coolant in the heater loop in the nose to buy time on the temps, and move the CG forward. Lots of talk of tufting the aircraft up to see the airflow. Wants to try some angle brackets ahead of the gear cavity. Added baffling / back wall in his intake scoop; it's not clear to me if he just hadn't worked that out yet for the first flight.