Author Topic: Pilotable Shipping  (Read 5260 times)

jeff3163

  • Misty Moorings Team
  • Hero Member
  • *
  • Posts: 3,081
  • Troubleshooting & Help
    • View Profile
Re: Pilotable Shipping
« Reply #15 on: August 27, 2015, 07:27:22 PM »
Hello Marcel,
     It is frustrating that those attached pictures have been deleted.  We'll have to post new ones as we go on, that are more up-to-date.  That Microsoft ESP SDK publication is a handy reference when trying to wrap your head around a function, or what syntax or parameters are relevant. 

     No boat designers have stepped forward yet.  But, we've never called out to them either.  Is there a boat designer in the house?  The marina is pretty quiet, usually.  No comments, no pictures, no stories.  But the thread gets many views.  People are boating out there.  But nobody is talking about it.   ;)

Win10Pro64, P3Dv4.1.7.22841, AMD Ryzen7 1800X@4.0 GHz , 32Gb RAM, NVidia GTX 1080 Ti, 1T/1T SSD's for Sims/OS, 3x42" Vizio Monitors, HTC Vive VR HMD, Saitek Yoke/Pedals/trim wheel, XBox360 Controller, G27 steering wheel w/shifter+pedals. :P

marc2140

  • Member
  • ***
  • Posts: 135
    • View Profile
Re: Pilotable Shipping
« Reply #16 on: August 28, 2015, 10:14:05 AM »
I found this document.
http://library.avsim.net/search.php?SearchTerm=fs_flight_dynamics_v1.0.zip&CatID=root&Go=Search
Looks rather complicated but maybe interesting for us who want to develop RTMM boats...
Marcel

Intel i7-4790k @ 4.8 GHz-MBO Asus MaxVii Hero-Corsair 780T-Corsair PSU 1000w-Corsair H100i GTX cooling-G Skill 16gb 2400/CL 10 (2x8gb)-Geforce GTX980 4gb ddr5-SSD 850 pro 512gb-2Tb HDD WD black 7200rpm-LG Blu Ray-Wifi pci-exp N900 (dual freq 2.4+5ghz)-Win7 Ult OS 64bit-FSX+Accelerator

Napamule

  • New Member
  • *
  • Posts: 1
    • View Profile
Re: Pilotable Shipping
« Reply #17 on: September 04, 2015, 12:39:28 AM »
Marcel,
I'm heeere! Let the fun begin! One boat at a time, of course. Who's on first?

What day is it? What month? I got lost on the way here. Veered off into the FAQ page and couldn't get it all read. Then I went to other departments and got eye-ball-itis (my brain hurt too-hehe). This site has a LOT of reading and not to mention tons of downloads for scenery, etc. But I can handle it-give me a weak or too. I'll be hanging around here on a daily basis as I am registered now. Certified, too.
Chuck B

Doug

  • Misty Moorings Site Admin
  • Hero Member
  • *
  • Posts: 3,025
    • View Profile
    • Return to Misty Moorings
Re: Pilotable Shipping
« Reply #18 on: September 04, 2015, 07:05:22 AM »
Hey Chuck, welcome aboard!!!

Doug

Bradallen43

  • Misty Moorings Team
  • Hero Member
  • *
  • Posts: 1,595
    • View Profile
Re: Pilotable Shipping
« Reply #19 on: September 04, 2015, 05:05:18 PM »
As we always point out to all newcomers, find and install all of our libraries of objects first.

Brad

stiletto2

  • Misty Moorings Team
  • Hero Member
  • *
  • Posts: 1,505
    • View Profile
Re: Pilotable Shipping
« Reply #20 on: September 04, 2015, 05:22:38 PM »
Welcome, Chuck!

The fun is just beginning!

Rod

marc2140

  • Member
  • ***
  • Posts: 135
    • View Profile
Re: Pilotable Shipping
« Reply #21 on: September 05, 2015, 05:54:36 PM »
Well, glad you made it Chuck.
You will not be disappointed, I can assure you...
There is enough to keep you busy for years!!!
Marcel

Intel i7-4790k @ 4.8 GHz-MBO Asus MaxVii Hero-Corsair 780T-Corsair PSU 1000w-Corsair H100i GTX cooling-G Skill 16gb 2400/CL 10 (2x8gb)-Geforce GTX980 4gb ddr5-SSD 850 pro 512gb-2Tb HDD WD black 7200rpm-LG Blu Ray-Wifi pci-exp N900 (dual freq 2.4+5ghz)-Win7 Ult OS 64bit-FSX+Accelerator

marc2140

  • Member
  • ***
  • Posts: 135
    • View Profile
Re: Pilotable Shipping
« Reply #22 on: October 08, 2015, 09:34:02 AM »
Hi to the boaters
I think I got some breakthrough in the subject of REVERSE THRUST FOR SHIPS.
I specifically was looking for a solution for boats with a piston engine (boats with turbo props and jet engines don't seem very realistic, do they?).
To me, many changes in the flight dynamics file (aircraft cfg) often looked like trial and error solutions. So i wanted to find out if there was'nt a universal method that could be applied.
Therefore first a small theoretical framework, but as simple as possible (my excuses to people who know much more about this and who'll say that I am oversimplifying):
A piston engine in FSX delivers forces that make a shaft turn in 1 direction only. That movement can not be reversed (i.e. anti clockwise). So reverse thrust does not come from the engine.
On the shaft sits the propellor.
There are 2 kinds of propellors.
A fixed gear propellor that can not create a reverse thrust,
and a constant speed propellor that can.
Why? Because it can feather. This is what happens when you feather a propellor: https://www.youtube.com/watch?v=eT3Pn6o6Dco
So it can create a reverse thrust, because it can change the angle of attack of the blades in the air or in the water.
Back to FSX:
It is actually rather simple to create a reverse thrust for a ship.
You go to the aircraft CFG file, look for the propeller section and see that you set the following parameters:
propeller_type= 0
beta_max= 65
beta_min= 15
min_gov_rpm= 500
prop_feathering_available= 1
prop_auto_feathering_available= 1
min_rpm_for_feather= 500
beta_feather= -65
prop_reverse_available= 1
minimum_on_ground_beta= 1
minimum_reverse_beta= -14
The rpm values may somewhat vary and also the beta values (feather angles) are not absolute. But I am pretty sure that the reverse beta must be a negative value.
And maybe a propeller with 4 blades works better for a boat, but I don't know for sure.
How do you make this work when piloting?
First F1 and then F2 will not work.
There is a command Cntr+F2, that is often misunderstood. In most literature it says that it reduces the RPM. But in Microsoft literature I found that it actually decreases the propellor beta (angle of attack of the blades), which means that it is the feathering command.
So if you are piloting a ship and want to reverse:
Push F1 first, keep Cntr+F2 down for some seconds, give throttle again and you'll be in reverse.
To return to normal thrust: again push F1, then Cntr+F4 for some seconds and give throttle again.
VoilĂ , problem #1 of the pilotable shipping solved.
Up to the next one: improving the autopilot tracking...
Cheers
Marcel



 
Marcel

Intel i7-4790k @ 4.8 GHz-MBO Asus MaxVii Hero-Corsair 780T-Corsair PSU 1000w-Corsair H100i GTX cooling-G Skill 16gb 2400/CL 10 (2x8gb)-Geforce GTX980 4gb ddr5-SSD 850 pro 512gb-2Tb HDD WD black 7200rpm-LG Blu Ray-Wifi pci-exp N900 (dual freq 2.4+5ghz)-Win7 Ult OS 64bit-FSX+Accelerator