SgtPappy
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Posts posted by SgtPappy
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Could be that the FM dll is based on the helicopter FM dll and they have left stuff in there that they shouldn't?
Doing that would probably make it harder, not easier to model the aircraft FM.
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My DCS isn't updating to 1.2.11. I even try launching the Update DCS World executable but it just flashes on my screen and then nothing happens.
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I tried to turn attention to this problem in this thread I created in early September realistic drag? Or gaining too much lift?
What problem? The glide ratio is confirmed to be correct. Your thread is about high speed drag.
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Yep. With engine off I got exactly 14:1. Idle engine must be doubling it. It is just a sharp contrast to how landing a Mig-21bis feels...
Good. As indicated by another member, idle thrust is enough to taxi the airplane at normal combat load after the static friction on the wheels has been overcome. So it's no surprise that while in the air, a significantly larger "glide" ratio is possible since you're not actually gliding.
While I am sure the "weight doesn't affect glide performance" is a useful rule of thumb for pilots, it can't be completely true. Mach number affects the lift and drag curves. Since the heavier aircraft must fly at a higher speed to hold the same path and AoA, the Mach number must be higher. Unless the Mach effects cancel out perfectly, the L/D ratio must change with Mach number. Depending on the shape of the curves and the ideal glide speed, it is possible that the heavier aircraft could actually have a higher L/D and therefore a better glide slope. I am guessing that the rule of thumb is taught (and generally holds true) because of the low Mach numbers involved in the ideal glide speed may have almost flat responses to changes in Mach numbers (at least near sea level? less than 10,000 feet?). At 36,000 feet where flying at the same IAS means flying at much higher Mach numbers, I am willing to bet the rule of thumb is a tad less accurate ;)The difference is that the airplane isn't maintaining steady level flight. Gliding is falling out of the sky so there are formulas that can find glide ratio (at speeds where compressibility isn't an issue) very accurately without the aircraft mass.
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I fly on a different computer than this one so I will have to upload the track and Tacview later.
I flew into a vertical, induced a snap roll which, as air speed drops, allows for a "climbing" flat spin. In the P-51, (considering the huge torque for the Merlin), such an aerobatic maneuver is easily accomplished. I have also done such a stunt in the A-10C, although it's not as impressively spinning as the prop-job.
In doing this maneuver in the Sabre, the inputs are the same but once the nose begins to "pull" into the flat spin (while going up), the Tacview shows the aircraft hitting that "limit" that keeps it in a slow conical spin rather than a flat one. Seeing that limit hit is what caused me to note the miscalculations in my post.
Once wind flow loses its influence on a spinning air-frame, inertia begins to take over and completes the motions. In the F-86, this does not occur properly. Basically, the aircraft doing this maneuver are in zero G or close to it.
As I have said, the Tacview clearly illustrates the lack of inertia in all axes and I will fly the maneuver in several aircraft and upload it all later, once I am on the sim-machine.
I found a YouTube video I did in the summer of 2012 in a P-51 that shows the maneuver. Keep in mind that the P-51 can do this very easily because of the engine torque. However, I also can get the A-10C to do it, albeit a bit slower in the spin because of those two massive vertical stabilizers. Link to follow:
Another demo of it. (Not my piloting):
Those look amazing! Well right now the rudder doesn't work at all in the F-15 or Sabre, so perhaps the lack of proper yaw inputs/reactions means you can't do the maneuver.
Yaw might be a little screwy for now altogether. It's a WIP anyway for now.
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I find it to be the easiest plane to fly. It never really gets into spins, it just drops a wing which is perfectly normal especially for early swept wing planes. Do not yank hard. Find out how to feel the plane out, because maneuvering above 250 kn should be easy as cake.
Adjust the curvature of your y-axis and trim well. You should be fine. The unslatted version stalls at a relatively high speed around 120 kn, which is realistic. The transonic handling is extremely realistic. The MiG will rip apart. A Sabre will not and is easy to recover. That is what it was known for being able to do, not just smashing through Mach 1 with no problems. A good read would be the Owner's Workshop Manual for the F-86. It's not an actual manual, but has tonnes of good info.
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Concerning the wheel brakes, there are tonnes of other threads that can help you find out how to use them properly.
If you're flying with engine at idle, that does not mean off. A small amount of thrust is still being produced. Turn the engine off, wait for total spool down and then see what the glide ratio is. According to the 1F-86E-1, the glide ratio in clean condition is 14:1 with speed maintained at 185 kn (giving 2700 fpm descent at 40000' and 1500 fpm at 10000').
I don't have time to test it now, but see if you can replicate those results. Based on how hard it is to slow down and land, I may agree with you, but we'll have to confirm with an actual dead engine.
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Yea, but not if the main spar is gone that deep...
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I noticed that every time my friend makes a landing in the Sabre, on my screen his gear automatically retracts and he looks like he's hovering around the taxiway. Additionally, his wheels protrude through the fuselage, sort of like the old glitch but only on the ground this time. See attached screens.
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Thank you for your answers. It clears things up. Hopefully we'll get the failure modes one day, but I understand it is hard to simulate.
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I would like a concept cleared up on a helicopter rotor vs a propeller. On a prop plane, like the P-51, running in too coarse of an RPM setting results in overtorque of the engine, causing it to eventually sieze and just stop instantly.
The Huey, which has a turboshaft engine and a separate transmission connected to said engine, does not instantly stop upon increasing collective to high of a point.
Is there any inherent reason why the Huey can take such high torque? Could early helicopters take such high torque values? I feel like they would have to, since overtorque conditions seem so easy to achieve.
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Yes, I downloaded Notepad++ and it worked! Very excited seeing a stream of tracers rip through the MiG in a split second.
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Just being curious I opened the F-86.lua file, and surprisingly one of the first things there is a function for the M3 browning machineguns.
It appears that the amount of ammo is correct, next one is "max_burst_length", don;t know why it's set to 150, but it explains why we can't empty the ammo bay in one trigger pull - changed it to 267, and I was able to shoot through whole belt without a hickup. Now the "rates" is interesting, because it's set to 800... like in the P-51D, but in here it doesn't do anything, because there are more lines of code bellow for each gun:
As you can see, the rates here are set between 679 and 883 :huh: which is pretty close to the fire rate I've measured. Now the fun part - I've changed them all to 1200, and the rate of fire is now correct !
Why were they set to half the correct value ?
I tried this and when I saved it, all the F-86's disappear from my missions. They won't even show up on the list of planes in ME. Instead, an A-10C takes its place.
Of course I have a backup just in case and using the default .lua fixes the issue. What lines did you change to make this work? Did you use notepad?
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I for one, am very excited. It will be great to fly this and fight human-controlled MiG-15's online.
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Sure! All flyable aircraft are available on the server to pick and fly.
Awesome, thanks! Hopefully I can get some fights in with others. What time is the server usually up/busy?
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Are there F-86 vs F-86 matchups on this server? I have yet to face another person flying the Sabre, and it will be a year or so until the MiG comes out.
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True, it's worth a try. But even if it were the frames dropping a bit, would the frame rate not have to drop to half its value in order to halve the effective rounds fired per second? Or am i missing something?
I notice almost no noticeable frame drop yet the guns still fire at essentially half the rate they should.
Alternatively, You could fire into something that would record hits in the mission debrief and look at the time and the rounds fired. That doesn't need frames.
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That's too bad. I was also hoping to fight other human-controlled F-86's.
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This is interesting. In gun cam films, it always looks like Sabre pilots are firing streams of rounds, like a laser almost. By comparison, the P-51 fires a max of 850 rpm and certainly doesn't have as long a firing time despite having 275 rpg for 4 guns and 400 for the other two. So something is surely fishy.
I suppose this would need fixing. It would certainly bring down MiGs in far fewer bursts. Can anyone on the BST team confirm this slow rate of fire?
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I am excited! Hopefully I can be on tonight.
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That sounds awesome. Although I suppose I should've been more specific. I don't have the MiG-21! But I'd really enjoy fighting good MiG-21 pilots in my F-15 equipped with nothing but rear-aspect heaters, or maybe some AIM-7s too. Whatever the server rules, I don't mind. But that type of dogfight would be great.
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Add some & brake some, that seems to bee BST's motto lately....makes me wonder who the hell is beta-testing before an update
Clearly, you've never worked with code before.
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Ok, that's good. As long as it is known. I miss having the tanker available on the 104th server.
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For an aircraft that can climb at over 50,000 fpm, fly greater than 1,500 mph, find targets at greater than 80 nm and can shoot down up to 4 of them beyond visual range and you STILL want more power?
Might be overkill!
On the serious note, it would be interesting to see if this will be implemented in the full PFM. Blowing yourself up due to mistakes is one of the things enjoyable about a sim.
F86F Missiles = Useless?
in DCS: F-86F Sabre
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It gives yo an idea of just how badly equipped the US was when they went into Vietnam, initially with this very variant of the AIM-9! Or at least if I remember correctly.