SR-71 development

[MJR]

I have a picture of me standing next to one. It was a monster. Tall and long wise.

 

[Urwumpe]

This one could maybe be helpful for you: http://sr-71.org/blackbird/manual/

 

[MJR]

I got into real big trouble so don't be surprised if I don't show up for awhile. I still will wokr on it.

 

[liber]

I got into real big trouble

Trouble like this?

 

[MeDiCS]

One word: ROFL

 

[MJR]

Trouble like this?

Almost.

 

[Usquanigo]

I hope whatever it is, you get it sorted.

 

[MJR]

I found a good picture Urwumpe, for the inlet spikes. http://en.wikipedia.org/wiki/File:SR71_J58_Engine_Airflow_Patterns.svg

---------- Post added at 10:12 AM ---------- Previous post was at 10:04 AM ----------

Also, the Blackbird used JP-7 fuel. It also used triethylborane to ignite the JP-7. For the afterburners it was used because on contact it would spark the fuel for ignition. It also only had sixteen ejections so we need to simulate that with a fuel box in the upper corner. Each engine also produced 145Kn of thrust power.

The cockpit can be done several different ways like we were talking about. Yesterday night while I was falling asleep I thought about adding the texture to the cockpit and making the main controls actual meshes with materials so it would stand out more. Or I could make each gauge and etc its own mesh including the needles. Which one sounds better?

Would you also like me to make a mesh for the inlet spikes or is that a bit overkill? I have been reading the diagrams, but I m still confused a little bit. I know that the airflow's change and all, but I didn't see a lot of differences between each of the mach changes.

---------- Post added at 11:16 AM ---------- Previous post was at 10:12 AM ----------

I know that sea level and pressure come into effect when establishing Mach speed, but what is the Mach speed of 3.2 in m/s?

 

[n122vu]

I have a picture of me standing next to one. It was a monster. Tall and long wise.

Have never seen one. Always one of my favorites though.

If you need any beta testers, I'd be happy to help.

SR-71. This is what a plane's supposed to be. She's ugly on the ground, leaks like a sieve. But up around mach one, her seals all expand, she dries up and leans into the wind and goes like hell.​

 

[the.punk]

I'm flying SR-71 in x-plane. Is also fun to fly.

 

[Urwumpe]

Also, the Blackbird used JP-7 fuel. It also used triethylborane to ignite the JP-7. For the afterburners it was used because on contact it would spark the fuel for ignition. It also only had sixteen ejections so we need to simulate that with a fuel box in the upper corner. Each engine also produced 145Kn of thrust power.

I wanted to make the TEB massless - it is not even a liter of it on board. The TEB for each engine is displayed next to the throttle. The 145 kN thrust of each engine is also not the maximum, but rather the "normal" maximum. The engines could reach more thrust at high altitude, before the EGT limits are really exceeded and the engine is taking damage. I think about calculating with a theoretical maximum of 160 kN, should be enough room for players to test the limits.

What would be more important for flying a mission, would be aerial refueling. The engines are so ineffective during subsonic flight and at low altitude, that they consume a lot of the fuel only for meeting with the tanker.

The cockpit can be done several different ways like we were talking about. Yesterday night while I was falling asleep I thought about adding the texture to the cockpit and making the main controls actual meshes with materials so it would stand out more. Or I could make each gauge and etc its own mesh including the needles. Which one sounds better?

I would prefer 3D gauges, as it looks better and we don't have too many gauges to draw, compared to the shuttle. If you want, I can make the important gauges and dials in anim8or this weekend, the flight manual has four pages which are showing exactly how the texture should be. You would just have to scale and fit them into the VC mesh then.

Would you also like me to make a mesh for the inlet spikes or is that a bit overkill? I have been reading the diagrams, but I m still confused a little bit. I know that the airflow's change and all, but I didn't see a lot of differences between each of the mach changes.

The spikes are a must, but you don't need to make the part that is not visible from the outside in any case. The afterburner and the turbine would be visible from behind though. Also, all the doors which are visible from the outside would be nice to have animated, so the changes from turbojet to ramjet mode would be visible.

I know that sea level and pressure come into effect when establishing Mach speed, but what is the Mach speed of 3.2 in m/s?

980.56 m/s at altitude.

 

[Hielor]

I know that sea level and pressure come into effect when establishing Mach speed, but what is the Mach speed of 3.2 in m/s?

It depends on your altitude.

 

[Arthur Dent]

Glad to hear that you're doing a remake of the SR-71 with an attachment port for drones. If I remember correctly it was me who originally requested a drone for the old SR-71 back then.

I just love piggybacking stuff and releasing it in high altitude

 

[the.punk]

I just love piggybacking stuff and releasing it in high altitude

Yes. That's cool.

 

[Urwumpe]

Yeah, but will take a time and require some serious test flying during the development.

I have started an invisible Habu.dll already last night, dealing mostly with the generic stuff... fuel tanks (6 resources), size, mass, height above ground.

Want to do the engines next, but this will take some more time. I don't know if I can do the engines directly or if I need tiny virtual thrusters for implementing them. Usually, for main and afterburner, I would need two thrusters for doing them right, but the throttle position is not proportional to both main and AB thruster levels.

For the release planning... anybody disagreeing with me, when I say: I wait for the first meshes, before I start releasing "nightly builds". These will be not even beta, could contain more bugs then the initial version, but are updated often. When things get done, I will release a alpha/beta/RC version on OH, which will be more bug free, until eventually turning the alphas into the official release and just keep posting development versions between major updates.

i don't want to do any tech support for the development builds, but it is an experiment if this would be better then using email for sending files around. I suspect I will get many bug reports, which are actually PEBKAC, when I do public testing, but it would make it easier to get test flight data.

 

[MJR]

I wanted to make the TEB massless - it is not even a liter of it on board. The TEB for each engine is displayed next to the throttle. The 145 kN thrust of each engine is also not the maximum, but rather the "normal" maximum. The engines could reach more thrust at high altitude, before the EGT limits are really exceeded and the engine is taking damage. I think about calculating with a theoretical maximum of 160 kN, should be enough room for players to test the limits.

What would be more important for flying a mission, would be aerial refueling. The engines are so ineffective during subsonic flight and at low altitude, that they consume a lot of the fuel only for meeting with the tanker.




I would prefer 3D gauges, as it looks better and we don't have too many gauges to draw, compared to the shuttle. If you want, I can make the important gauges and dials in anim8or this weekend, the flight manual has four pages which are showing exactly how the texture should be. You would just have to scale and fit them into the VC mesh then.



The spikes are a must, but you don't need to make the part that is not visible from the outside in any case. The afterburner and the turbine would be visible from behind though. Also, all the doors which are visible from the outside would be nice to have animated, so the changes from turbojet to ramjet mode would be visible.



980.56 m/s at altitude.

Thanks for all the comments. I prefer that you go ahead and get the important gauges done this week because I probably won't have the opportunity for awhile. Save something for me to do though.

---------- Post added at 02:31 PM ---------- Previous post was at 02:21 PM ----------

I also have a feeling this is going to be a very popular addon.

 

[the.punk]

I also have a feeling this is going to be a very popular addon.

Yes. Definitely from my side.

 

[MJR]

I am shaping up the base of the cockpit. When I get that done I will make the sides of the cockpit.

 

[Usquanigo]

I am shaping up the base of the cockpit. When I get that done I will make the sides of the cockpit.

Sweet!

:speakcool:

 

[Urwumpe]

I am shaping up the base of the cockpit. When I get that done I will make the sides of the cockpit.

Any instrument you need done first?