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Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
DFW C.V late production 1917 & 1918
- Thread starter Captain Kurt
- Start date
The B24 Guy
SOH-CM-2022
Hi CK,
Still dances for me.
If I get the empty_weight_pitch_MOI at about 3500 it stops.
Any lower and it shimmies.
Regards,
B24Guy
Still dances for me.
If I get the empty_weight_pitch_MOI at about 3500 it stops.
Any lower and it shimmies.
Regards,
B24Guy
Geez, you would think we were talking about different aircraft altogether.
Adding to the pitch MOI works in Free Flight although it makes the flight characteristics more twitchy. But try making a quick mission with accompanying wing men test and you'll see all the planes jumping completely off the ground. it does that with my attempt above too.
The usual culprit for causing a plane to jump about is simply the static height and static pitch being set to low. I finessed that with the above files.
The issues are evidently much more complex and interconnected for a quick fix like either the MOI or the ground stance change to work unfortunately. Things like the CG position, datum position, the contact points, scrape points, static cg height, and static pitch all interact. In that mix there must be some error(s) that are causing the problem.
Rather than trying to continue to diagnose and multiple testing to try to figure what the problem(s) are, I created a whole new cfg and air file. These seem to be stable, including using the test mission. She files nose high but that can be trimmed out. In my rig she is rock stable on the ground.
Give these a try, Guys. Let me know if they are working, so I can update the download files.
View attachment DFW new airfiles.zip
Adding to the pitch MOI works in Free Flight although it makes the flight characteristics more twitchy. But try making a quick mission with accompanying wing men test and you'll see all the planes jumping completely off the ground. it does that with my attempt above too.
The usual culprit for causing a plane to jump about is simply the static height and static pitch being set to low. I finessed that with the above files.
The issues are evidently much more complex and interconnected for a quick fix like either the MOI or the ground stance change to work unfortunately. Things like the CG position, datum position, the contact points, scrape points, static cg height, and static pitch all interact. In that mix there must be some error(s) that are causing the problem.
Rather than trying to continue to diagnose and multiple testing to try to figure what the problem(s) are, I created a whole new cfg and air file. These seem to be stable, including using the test mission. She files nose high but that can be trimmed out. In my rig she is rock stable on the ground.
Give these a try, Guys. Let me know if they are working, so I can update the download files.
View attachment DFW new airfiles.zip
Hello, Everyone-
First, I would like to thank Capt.Kurt for these beauties! In general, I think that the German two-seaters are very 'elegant' machines, whether they are L.V.G., Albatros, Rumpler, Halberstadt, or Roland- much more style points than their opposite numbers... And I didn't realize the reputation these had for being able to take care of themselves! Kurt did a great job with these!
Regarding their behaviour, I didn't have any issues flying them in CFS2- maybe a little tail-hopping at the start of the takeoff roll, but that was all. The interesting stuff began as I proceeded to port them over(I typically move them into FS8 first, then FS9)... more hopping, dancing around as they sat, a little shimmy in the air at speed. Using weights and dimensions I found, I recalculated the MOI values, and then gradually increased the pitch and yaw MOI values until they were steady.The dancing on the runway was solved in the contact points section- I increased the max/static ratio to 2.5, and lowered the damping ratio to 0.8 for the tail skid, and 0.4 for the wheels(I was looking at other config files when I noticed this). All better!
It's all good, Kurt! Thanks much again!
Mike
First, I would like to thank Capt.Kurt for these beauties! In general, I think that the German two-seaters are very 'elegant' machines, whether they are L.V.G., Albatros, Rumpler, Halberstadt, or Roland- much more style points than their opposite numbers... And I didn't realize the reputation these had for being able to take care of themselves! Kurt did a great job with these!
Regarding their behaviour, I didn't have any issues flying them in CFS2- maybe a little tail-hopping at the start of the takeoff roll, but that was all. The interesting stuff began as I proceeded to port them over(I typically move them into FS8 first, then FS9)... more hopping, dancing around as they sat, a little shimmy in the air at speed. Using weights and dimensions I found, I recalculated the MOI values, and then gradually increased the pitch and yaw MOI values until they were steady.The dancing on the runway was solved in the contact points section- I increased the max/static ratio to 2.5, and lowered the damping ratio to 0.8 for the tail skid, and 0.4 for the wheels(I was looking at other config files when I noticed this). All better!
It's all good, Kurt! Thanks much again!
Mike
The B24 Guy
SOH-CM-2022
Hi Captain Kurt,
The new files work for me.
I did move the eyepoint to -6.1 from -7.4
Thanks,
B24Guy
The new files work for me.
I did move the eyepoint to -6.1 from -7.4
Thanks,
B24Guy
Ravenna
SOH-CM-2023
Kurt,
I've been looking at the DFWs all afternoon and I've just noticed a small difference between the late models and the mid production version. The mid production machine sits on the ground whereas the later machines are very slightly elevated. All of them sit still on loading but take off needs much more care in the late production aircraft. The mid production machine is much more stable on take off and landing.
Do they have the same aircraft and air files?
I've been looking at the DFWs all afternoon and I've just noticed a small difference between the late models and the mid production version. The mid production machine sits on the ground whereas the later machines are very slightly elevated. All of them sit still on loading but take off needs much more care in the late production aircraft. The mid production machine is much more stable on take off and landing.
Do they have the same aircraft and air files?
Mike
They do not, yet. With this latest update, they will.
B24Guy,
LOL good catch. I've been totally focused on getting it stable. I've spent all the time flying outside the cockpit so I could see how it was behaving that I never once stepped into the VC cockpit.
They do not, yet. With this latest update, they will.
B24Guy,
LOL good catch. I've been totally focused on getting it stable. I've spent all the time flying outside the cockpit so I could see how it was behaving that I never once stepped into the VC cockpit.
Version V.2 has been posted
Version V.2 with fixed flight files has been posted. The original download links are still good.
Version V.2 with fixed flight files has been posted. The original download links are still good.
