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The Staff of SOH
Douglas X-3 Stiletto FSX Native
- Thread starter Milton Shupe
- Start date
Take off: Flaps 3
Climbout: Full AfterBurner to altitude
At 250, begin rotate
At 280, Flaps 2
At 350, All flaps up
Cruise less than 350, Flaps 1 (LE 10)
Descent: Below FL180, less than M.92
Appoach: Slow to <350 for long approach
Below 350, flaps 1
Below 300, gear down, flaps 2
Below 260, full flaps
Maintain 250 to short final
Landing: slow to 240-255 over the fence for touchdown contact
Speed brake may be used anytime, any speed, any altitude - affects only drag (I rarely need it)
See chart
Attachments
warchild
Charter Member
OK, so late last night/Extremely early this morning ( 2AM) I started blending in the NACA/Nasa Data with the FDE provided by Milton. I even added the seemingly backwards CG Aft and forward limits. I also saved off Miltonsairfile and replaced it with the one I had started while working on Ito_Sama's version, into which i added the Naca/Nasa data relevant to the Air file. I think youll agree after watching this that i need to reloacate all the Naca/Nasa airfile data, over to Miltons airfile. After inserting all the data, I turned on shadow play and recorded the very first flight of the full, base fde. I've never broken a horse before, but i imagine it must be something like your about to see. The recording was at 6AM this morning. Since then, Ive gotten light years beyond this.. Truth told, this is one of the best first flights, i have ever had in an aircraft. Usually they spin wildly out of control or bounce up and do back flips.. This is a good start.. 
Enjoy..
Enjoy..
Making some progress on several fronts ...
Exterior: Window seals, wheel chocks, wheel and tire textures
Interior: Yoke, X-3 Emblem on the yoke, VC interior windows (no outside reflections) in rubber seals, side wall insulated covers
Exterior: Window seals, wheel chocks, wheel and tire textures
Interior: Yoke, X-3 Emblem on the yoke, VC interior windows (no outside reflections) in rubber seals, side wall insulated covers
Attachments
warchild
Charter Member
was just flying this .. .. Thats looking so good in so many ways, it ain't funny. Beautiful job on the flaps too and speed brake too.. hell, i'm in love..
Still working on blending things. Currently the elevator has a bit too much authority and the plane complains at anything over 4G's. I'm tempted to practically flatten out the angle of attack rate. This thing wasnt exactly an aerobatic plane anyway, and at seven hundred mph, i imagine the G's pile on real fast. Should have something by the end of the week though..
Pam
.. .. Thats looking so good in so many ways, it ain't funny. Beautiful job on the flaps too and speed brake too.. hell, i'm in love..Still working on blending things. Currently the elevator has a bit too much authority and the plane complains at anything over 4G's. I'm tempted to practically flatten out the angle of attack rate. This thing wasnt exactly an aerobatic plane anyway, and at seven hundred mph, i imagine the G's pile on real fast. Should have something by the end of the week though..
Pam
was just flying this
Still working on blending things. Currently the elevator has a bit too much authority and the plane complains at anything over 4G's. I'm tempted to practically flatten out the angle of attack rate. This thing wasnt exactly an aerobatic plane anyway, and at seven hundred mph, i imagine the G's pile on real fast. Should have something by the end of the week though..
Pam
Pam, I believe the best description of handling and stalling characteristics is described in this NACA test document I sent:
STABILITY AND CONTROL CHARACTERISTICS OBTAINED DURING
DEMONSTRATION OF THE DOUGLAS X- 3 RESEARCH AIRPLANE
I believe the pos G no flaps was set at 6.5 which was attained during one test flight. I have the cockpit shaking and rumbling starting at 5G's I think; that can be changed.
Attached are the Load Factors from data I sent.
AoA at cruise was 2 degrees, I read somewhere but can't find it at the moment. At speeds less than 350IAS, the LE flaps need to be set at 10 degrees.
RE: Elevator authority, see attached.
Attachments
warchild
Charter Member
thanks Milton..I'll have another read through. The load data i am very grateful for. I've been looking for that for some time. Now i can put everything into its right place. Caan even almost begin visualizing the chain of events leading to the coupled effects. I'm still working on getting the nose to not bounce when the elevator is used. otherwise, the plane is currently in a stable and controllable configuration for the moment. I'm currently working on all the coefficients in the air file and weeding my way through those. It may take a while but hopefully not too long. Tonight, I'm taking off work to get a little rest. I've been pushing both ends of the candle with the P-61 and X-3 and i'm a little tired.. Gonna get a good nights rest.
I'm still trepidatious about making the plane reach out and bite you at exactly 1.05 Mach. Still unsure how to go about doing that, but hoping perhaps once i have everything else correct, it'll do it on its own. I'm considering adding in the various station weights and locations as well, like i did with the OzX goose redux. Currently its a great plane to fly.. Lots of fun.
I'm still trepidatious about making the plane reach out and bite you at exactly 1.05 Mach. Still unsure how to go about doing that, but hoping perhaps once i have everything else correct, it'll do it on its own. I'm considering adding in the various station weights and locations as well, like i did with the OzX goose redux. Currently its a great plane to fly.. Lots of fun.
Pam, there is no hurry. Project is just getting started. Model has a long way to go yet, then textures, VC, sounds, docs, etc.
No need to punish yourself here. Focus on the things that are important now; put this at the end of the list.
Jafo
SOH-CM-2024
Cool...I like messing with 2D panels...
warchild
Charter Member
I'm loving these gauges, and the seal around the widows is first rate loving it all really..
Could you ask Mr. Thomas if he would be so kind as to extend the Mach speed indicater gauge out to Mach 2.5 Please?? My logic is the the plane was always intended to be a Mach 2 plane, and would have been designed as such, with gauges to support it.. Thanks in advance.
More soon..
Addendum:
FDE v Alpha 1.0 is ready to go to the devs for their perusal and testing. I will get that out to Milton in the next five minutes..I'm calling it the "Easy Chair" version. Really, a 747 should be this smooth. The reason I made it this smooth and stable was to get a controllable state to start the real work in. As is, the real plane made 43 flights, of which it experienced Adverse yaw/pitch in only three of the flights. I need to get the plane to the point where given the right amount of everything, including weather and wind, it will experience that same adverse yaw/pitch with the same freaquency as the real aircraft, and at the same speed.. Now that it's stable, i can do that. Time to do some more research and reading..
Milton, Tom, Scott! I do hope you enjoy my humble offering. Turn off limited fuel and enjoy the view through those big panes of glass.. Milton? ould you please forward the fde to Mr. Thomas?? Thank you..
Pam
loving it all really..Could you ask Mr. Thomas if he would be so kind as to extend the Mach speed indicater gauge out to Mach 2.5 Please?? My logic is the the plane was always intended to be a Mach 2 plane, and would have been designed as such, with gauges to support it.. Thanks in advance.
More soon
.. Addendum:
FDE v Alpha 1.0 is ready to go to the devs for their perusal and testing. I will get that out to Milton in the next five minutes..I'm calling it the "Easy Chair" version. Really, a 747 should be this smooth. The reason I made it this smooth and stable was to get a controllable state to start the real work in. As is, the real plane made 43 flights, of which it experienced Adverse yaw/pitch in only three of the flights. I need to get the plane to the point where given the right amount of everything, including weather and wind, it will experience that same adverse yaw/pitch with the same freaquency as the real aircraft, and at the same speed.. Now that it's stable, i can do that. Time to do some more research and reading..
Milton, Tom, Scott! I do hope you enjoy my humble offering. Turn off limited fuel and enjoy the view through those big panes of glass..
Milton? ould you please forward the fde to Mr. Thomas?? Thank you.. Pam
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I'm loving these gauges, and the seal around the widows is first rate
Could you ask Mr. Thomas if he would be so kind as to extend the Mach speed indicater gauge out to Mach 2.5 Please?? My logic is the the plane was always intended to be a Mach 2 plane, and would have been designed as such, with gauges to support it.. Thanks in advance.
More soon
... snipped ..
Pam
Scott and I talked about the Mach meter going to 2.1 but the original panel gauge, as all gauges we have now, are just like the real world panel. So, we decided to stay authentic instead.
With that said, the tool tip does read past the gauge markings to give actual Mach in a dive. I believe I got it to M1.1 on one dive.
warchild
Charter Member
well, if it follows the standard path for an eliptical wing then the lower pressure wave moves back to about 25% MAC while the upper pressure wave moves back to a little over 50% mac. the other phenomena observed during this time is that the pressure cone gets narrower/smaller (??)
Okay, correction on the Mach meter - the museum piece in Ohio has a Mach 1 meter.
As Pam has pointed out from the manual, the graphics show a Mach 3 meter. So, we will in fact upgrade our Mach meter to one that is "more authentic".
As Pam has pointed out from the manual, the graphics show a Mach 3 meter. So, we will in fact upgrade our Mach meter to one that is "more authentic".
warchild
Charter Member
Okay, correction on the Mach meter - the museum piece in Ohio has a Mach 1 meter.
As Pam has pointed out from the manual, the graphics show a Mach 3 meter. So, we will in fact upgrade our Mach meter to one that is "more authentic".
Thanks Milton.. That will be awesome.. Theoretically i actually have someone coming to visit me today.
. So i'll be waiting till tomorrow to jump back on the fde.. Theresanother curiosity i wnt to play with at some point in the future.. The bottom of this plane is flat, in a way that almost mimics and F-14, Now, Nasa hadnt even thought of their first lifting body at that point, so they wouldnt have taken into account, the amount of lift generated by that flat space, like the engineers at Grumman did twenty years later. But that lift would be there. it'll be intreresting to see how it plays into the behavior of the plane..
Time available has been limited but some progress to report.
Found the sweet spot for hi-res gauges for the vc panels, and Scott continues evolving the 2D panel and pop-ups. Scott also added a Mach 3 meter as an option.
Did some tweaking of the main gear to stiffen suspension while ensuring proper ride height, tweaked yoke animations, and yoke handles appearance.
Working to map the VC panels and gauges now.
EDIT: adding a gmax view of the VC panel and gauges construction just for interest
Found the sweet spot for hi-res gauges for the vc panels, and Scott continues evolving the 2D panel and pop-ups. Scott also added a Mach 3 meter as an option.
Did some tweaking of the main gear to stiffen suspension while ensuring proper ride height, tweaked yoke animations, and yoke handles appearance.
Working to map the VC panels and gauges now.
EDIT: adding a gmax view of the VC panel and gauges construction just for interest
Attachments
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