When using the afterburner, the restrictions regarding maxium heat supply do not apply, so that in the case of almost constant mass flow but considerably increased exhaust velocity, the thrust curve continues to increase with the Mach number."
I believe that would make a huge difference for supersonic jets, as they will end up with a fraction of their real thrust at high Mach numbers. Accordingly, at the moment it might be next to impossible to build realistic supersonic jets in X-Plane.
Thanks a lot, that's quite an interesting document - even if I'm struggling to understand most of it :-) Seems they are considering the reader more familiar with jet engine theory than I am ... probably with a bit more background knowledge, I'd understand how the various diagrams apply to the question I'm dwelling on, so maybe the answer is actually in there!
Basic instructions are included in the zip. You will need to drill two holes per detent (into the 3d prints only), and do some sanding. You will also need some small springs from your local hardware store, or rubber bands.
I currently have the version 2 throttle (with 5-way hats). I'll test this out on that throttle and let you know how it works out. Shapeways is stating an estimated ship date of October 16th, but in my experience they always come in under that.
Ok, I've got it working. the kit I ordered had multiple sizes of springs, and what I found worked was a 13/64" x 13/16" extension spring on each lift. It didn't have quite enough tension, though, so I combined it with a 3/16" orthodontic rubber band twisted around the posts twice (I had to do that with needle nose pliers).
The current detent is only a few mm thick, but it prevents a lot more travel than that due to the geometry. That's ok for afterburners - we still have 5 zones we can choose from so we need some motion of travel there.
But from idle to shutdown, the movement should be quite small to preserve travel throw. No more than a few millimeters. So I need some clever new way to stop rear travel at just a few percent from full stop, but allow full travel for shutdown when lifted, or something. Hope that makes sense.
In the F-5 there is something I find very annoying, the afterburner seems to have a very important delay between the moment you push the throttle to max and the moment the AB kicks in (no matter if from iddle to mil power)...it takes more or less 4 seconds!!:huh: this is a hell of a lot of time...so in this plane I need to anticipate too much to moments in which I migh need it and some times those 4/5 secs are very important, for example in a merge...
Another thing I experience is that sometimes, for no reason apparently, the right engine doesnt activate AB even when I have the throttle at full power :huh: ...I remember that it always happens with the right engine and its NOT a problem with the controls nor the hotas because I see using control+enter that the power is at FULL in both engines. So I have to pull the throttle back a bit and then at full and the AB kicks in finally.
Some times I have had problems in dogfights because the right engine wasnt giving me the AB power and I notice it many times when its too late to react looking at the rpm gauge and seeing its not at AB level...
Also noticed that delay but seems to me more natural for the engines to behave like that than instantly going on AB. Don't know if u noticed that if you push the throttle fast for full AB the RPM idling a bit to >90 then going up again but if you slowly advance the throttle RPM are maxing normally to AB power. Seems to me very realistic.
while I understand what you mean with realistic feeling (things dont use to be instant IRL) also think about F-15, mig-29, Su-27, etc. where the AB only takes 1 sec or so. I never piloted any of those planes (sadly :P ) but Im pretty sure this is how they behave IRL so slower AB doesnt necessarily mean more realistic feeling.
What I find really weird is the problem of the right engine AB not working some times...I cant manage to identify any reason for that...some times it works perfect, others I push to full power and after a while I realize my right engine's rpm are not as they should at full AB as well as nozzle position, temp, etc. so it looks like something working coherently but at the same time oddly...
I dont think RL F-5 pilots have to deal with engine AB not working some times right?...and its not happening after a long time of inverted flight, or high g's, etc....no, after flying straight, right into a merge, I push to full power and sometimes bang!!, right engine fails to kick AB which I notice too late because I was trying to keep sight of the enemy plane Im dogfighting :doh: ...
I don't know about the right engine thing, but I do know aircraft engines at that time frame had the delay when setting afterburner. Whether it was 4 seconds or not I don't know, but I remember reading of a pilot in Vietnam who found himself sinking towards the ground after a bomb run (f105 I think) who crashed because he selected afterburner and lost some crucial thrust before it caught. I think afterburners work different now. I think it basically "choked" the engine for a few seconds with extra fuel until it lit.
thanks mates, I think the "delay" issue is solved then...as I though I guess its a matter of technology, and that time fighters simply had a slower AB system, and yeah, BST did and AMZING job with all the F-5 module!!
But the problem with the AB failing some times is the worst thing...I havent had this issue with any other plane never, it happens in 1.5 and other 3 differents installs of the 2.0 version I have, my warthog is like 3 months old and works great and I remember having this issue also with my old X52 pro so...anyone elese has ever experienced this particular issue??
Yes. This is also pretty standard behaviour for an aircraft of the F-5s generation, it's simply the AB failing to light off. (the fact that the fuel flow stays at AB levels is questionable, but that might just be due to the way AB light failures/blowouts are modelled).
Unlike modern fighters the engines in the F-5 don't have any digital control/management systems, so if you start slamming the throttles around and/or making large power setting changes at high AoA/low speed you can expect to see issues such as surges, stall, and AB light off issues.
To minimise AB light off issues in the F-5 allow the engines to stabilise at max dry before engaging AB. Even doing that you may still see the odd light off failure at low airspeed, high AoA, and high altitude.
1- If I remember correctly, I have had the issue even after being a few minutes at high power level, so after the engines being stabilized, in fact I would say that most of the times I have had the problem have been seconds before the merge so flying straight and at high/mil power.
I thought it was a feature, but in the second thread Skatezilla states that developers asked for a track and it was provided, what makes me think that this "feature" was unknown to them, making it more like a bug. Here:
The F-5s engines are quite picky. The most reliable way to ensure afterburner lightoff has occurred is the nozzle position indicators. If either one fails to swing through the 6 o'clock position (stays closed), then that afterburner hasn't lit. Biskly moving the throttle back to full MIL, then to afterburner should fix the problem. If not, then you're probably near the edges of the afterburner lightoff envelope.
yeah, the nozzle position the what I use to know if the AB is enabled or not. As you said, I have to move back the throttle to a non-AB position and then all the way in to try a second time and the AB finally kicks in...
The options are pretty diverse, and allow you to flip the Y axis (Reverse or Normal), change how the barrel roll operates and how many planes you get between continues, as well as the usual button layout. I find the default layout to work great for me. Double-tapping the button enables the afterburner but also by double-tapping any speed button automatically accelerates or decelerates your plane to that preset. Simply holding the button down allows a gradual change in speed. Personally, I find all these options logical and very welcome.
If you like shmups and/or After Burner, and want a quality title to add to the somewhat meager 32X lineup, this is a game you must buy. Is the best home version of After Burner you can get. REVO EMAG!
In recent beta builds (14.3.0 and newer) we've added support for Apple's Afterburner accelerator card which is an optional component available for 2019 Mac Pro systems. Currently we support decode acceleration of ProRes 4444 and 422 codecs using the Afterburner card. Please note: ProRes RAW acceleration via the Afterburner card is not currently supported - although CPU decompression is available for ProRes RAW.
Unfortunately there is currently no way to identify utilization of the Afterburner card - but if you have a 2019 Mac Pro with an Afterburner card installed, and your workflow contains ProRes 422 or 4444 content, please share your experience with us in this thread.
The last we checked MenuBar Stats 3 did not show Afterburner usage. Can you share a screenshot of where it shows Afterburner usage? Also, Afterburner does not support encoding - only decoding - so it is a bit odd that it would show any usage during encoding to ProRes unless of course your transcode source is ProRes.
I'm starting to wonder if MenuBar Stats 3 is pulling info from the Vega II Duo and mistaking it for the Afterburner. That would explain why I'm getting these odd readings (it showed usage even when not playing back the ProRes proxies):
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