General Category > Unofficial F/A-18 Acceleration Pack board

Cat launch force

(1/3) > >>

wilycoyote4:
here is a quote from sprouty on his work-around----
http://www.sim-outhouse.com/sohforums/showthread.php?54718-Moving-Ships-what-s-the-big-deal
reply #38

The best way to explain what my work-around is made of is to start from DeltaLima words.
In one hand you have Acceleration feature that manage positioning and holdback fixation and blastshield animation but launch with far too much strengh for some light plane.
In other hand, you have RCBCO 3.0 that manage a adjusting launch speed but a fixed coordinates positioning.

My idea was to merge both solution taking best part from each feature:
- the positioning, launchbar and blastshield animation is done by FSX/Acc functionalities
- Launch is done by RCBCO 3.0 's dll

I made a small xml code which:
- calculates the launch speed required taking account weight, air speed on the deck, and plane properties (max gross weight and design speed)
- manage the launch process step by step including some control that FSX didn't took into consideration (throttle, flaps) and local variable to help my carrier model to animate the shooter officer.
- Fire the launch with the appropriate speed

With the courtesy of Rob Barendregt and Doug Dawson (thanks again!!) this small gauge has been packaged with the Etendard and the Zephyr, and I'm working on adapting it to Dino's T45c.

There are 2 issues with this solution:
- I don't succed in managing the catapult vapor effects...
- the launch is done by increasing speed but not acceleration so you don't have any G effect during the launch. It seems that FSUIPC and/or Simconnect doesn't overide the acceleration value...
To my own point of view these two points are minor and fully acceptable...

Reagards
S.

This thread has many posts about cat launch.  Sprouty's mention of Dino's freeware T-45C as a project is interesting.

wilycoyote4:
this test seems to work

only one thing to do----this has nothing to do with spoutys Etendard work-around

in the FSX.CFG add in the realism section---

[Realism]
CatapultForceLimiter=0   //Enables the catapult systems to generate the required force for any type of aircraft.

My cat launch speed for the T-45C at the end of the cat track was 138 KIAS
that is 25 knots of carrier boat speed and a cat track speed of 113 KIAS for the 138 KIAS total.
Full throttle.
Almost max gross weight---see screeny.

Would anyone else like to try this to get realistic speeds on the Goshawk and other carrier aircraft?

GOONIE:
Interesting find.

I added the line to my fsx.cfg file and then did a cat launch in the hornet using full Mil power (not burner). My end speed was 189kts. Is this better or more realistic?

What I also liked from your post was the xml file discussed, which changes the FSX trigger for the "shooter" animations. It would be great if the "shooter" only gave the cat launch pose/signal (fencing positing/pointing) when you went full power instead of when you attach to the catapault. Small thing, but more realistic.

-Capt.

wilycoyote4:

FSDeveloper - Wiki - Catapult/Arrestor Operations (FSXA) - Configuring (FSXA)

the above link may help
---------------------------------------

http://www.sim-outhouse.com/sohforums/showthread.php?54718-Moving-Ships-what-s-the-big-deal
A thread here covers many parts of ships and carriers so there are replies regarding cat launch.  Readers must go through the rambling replies.  One of the replies is quoted in the first post of this topic.  It is sproutys explanation of his method to get a more realistic cat launch speed for his freeware Etendard aircraft.
------------------------------------------------
The use of the single line to the FSX.cfg file seems to work for some people.

Does it work for you?  For most people?

Does weight matter much?  Or not at all?

And throttle as a factor?

At the moment, to me, it seems ok, perhaps not perfect, but cat launch speeds for the freeware T-45C are very much better.

wilycoyote4:
A test of Dino's freeware F-14D. Very high weight, 100% fuel, 69,426 pounds launch weight, throttle N2 99%, no AB as F-14D Tomcats usually launched without AB.

Speed 193 KIAS at end of cat, minus carrier speed of 25 knots gives cat track speed of 168 KIAS.

In another test at that weight but throttle at N2 87% the speed was 189 KIAS.

Not much difference. 

Navigation

[0] Message Index

[#] Next page