Raptor Composite Aircraft

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cheapracer

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That’s within your power now, though it would take some work. You can start a thread in the PROJECT LOGS section with a prologue, and then copy/paste all of the posts that you think are valuable. Done in the project log section means that it would stay pure to your line of thinking so that you can add to it as needed without any distracting crosstalk.
Also, there is an "ignore member" function here that simply blocks the posts of the those who you prefer not to read.

it works, and works well. Just right click on the members name on the upper left of their post, open, then click on the "ignore" tab upper right on their HBA homepage ...

ignore.JPG
 

RSD

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I didn't realise that Jeff Kerlo was involved in this project originally. Have been watching his X Plane project and I'm a little concerned that it seems to be proceeding a bit too fast...
 

RSD

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What does that mean?


BJC
When things like this are proceeding rapidly things can be missed because there is less time for thinking and what if ? I've seen outcomes that aren't as desired in projects that are proceeding faster than would be considered normal.
 

Hot Wings

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When things like this are proceeding rapidly things can be missed because there is less time for thinking and what if ?
Kind of depends on the person involved. I've known several individuals when tasked with a project seem to sit around doing nothing but drinking coffee and sketching on a pad for a few days. You wonder how they will ever get anything done. :oops:

Then one day when you come to work the project is finished ........... and error free. :cool:
 

Deuelly

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When things like this are proceeding rapidly things can be missed because there is less time for thinking and what if ? I've seen outcomes that aren't as desired in projects that are proceeding faster than would be considered normal.
The speed of a project is dictated by project planning and preparation. Your planning dictates the potential for something to be missed. Their plane could be going together faster if they had planned differently but this is the pace they chose.

Brandon
 

bmcj

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When things like this are proceeding rapidly things can be missed because there is less time for thinking and what if ? I've seen outcomes that aren't as desired in projects that are proceeding faster than would be considered normal.
Not necessarily. As others said, it depends on who’s running the show. Two great examples of ‘get it done quick, but get it done right’ would be Kelly Johnson and Burt Rutan. Both had the ability to pump out new (flying) designs in very short order that performed as predicted.
 

bmcj

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Also, there is an "ignore member" function here that simply blocks the posts of the those who you prefer not to read.

it works, and works well. Just right click on the members name on the upper left of their post, open, then click on the "ignore" tab upper right on their HBA homepage ...

View attachment 89374
Yep, that works as well, but being someone who prefers hand-flying over autopilot, I prefer to use the manual ignore function over the auto-ignore. Even some of the people I prefer to ignore come up with an occasional gem.
 

Venom

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....."Some engineers (orion) do not recommend load test of flight airframes
'
Yes, I understand. Most do build a dedicated airframe to test to ultimate. And I also understand, as you indicate, when that testing is typically accomplished.
However in this case, it is not clear that the airplane has even been suspended by the wings in the upright position to test 1g...never mind 1.1g.
It just seems inconceivable to me that an experienced test pilot/engineer would climb into a one of a kind airplane, with contrucsion like we all viewed, without asking for SOME form of a structural integrity test.......

460 mph eh? Must a been a jet, cause it wasn't a sport!
 

FarmBoy

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Now that he will be able to increase his fuel flow, unless he modifies his map and boost parameters accordingly, without more (cool) air via properly matched turbos and ICs, while he may certainly achieve higher HP, I'm guessing we'll be seeing more smoke and higher EGTs. At least he did do one (perhaps two) of the items on my list. Tuesday's update should be quite interesting.
 

flyboy2160

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In Our Latest Episode: He now thinks his tank/boost pump needs to put out a lot more pressure to feed the high pressure rail feed pump. Unless he only has one pump, which would make his references to the OEM fuel circuit diagram meaningless.

What pilot in his right mind would touch this thing after seeing stuff like this?
 

pictsidhe

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What scares me is all the things that he is having to fix because he didn't read the instructions or refused advice from an experienced person. Jeff is not talking about the project, which is telling.

Nosegear: arbitrary rake angle, threw in oil that seemed like a good idea rather than spend 15 minutes googling how Lancair specifies it. Fuel system, didn't check how Audi did it before substituting their known good parts. Turbos, shunned professional sizing advice and successfully reduced power and increased BSFC and EGT over the stock Audi system.

Notice a pattern? He takes well engineered stuff that works as standard, then 'upgrades' it so that it no longer works properly. Then there's the engineering that he's done from scratch, like the redrive and the ailerons...

There is sure to be plenty more that is still to rear its bastard head. This will likely go on until some major failure destroys the project, hopefully on the ground. With his new found engine tuning knowledge, that may be quite soon.
 

Rik-

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I’m starting to see some patterns.

What conclusions can we draw upon the raptors design versus other similar designs?

Velocity
Commuter Craft
Raptor

There might be others that I am unaware of, but from an ignorant perspective these look a lot alike. So why was the velocity successful, why was the commuter craft successful (well at least it flew) and what has Raptor done so differently then the other two with exception to engines.
 

BJC

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Toobuilder

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There is far more to aircraft design than shape or planform. With misapplication of systems integration and structure, one could create a visual clone of a 172 but end up with an evil handling, structurally questionable and poor performing mess.

In airplanes, the details count.
 

Rik-

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