wip HYD Pressure jumps using hand pump, Cowl Flaps not opening far enough

[TacticalOni]

Hello!

 

before startup, to get pressure to open the cowl flaps, a couple good pulls on the hand pump is required.

 

When pulling the hand pump lever with the engine off, the HYD PRES needle stays seated until the pump lever reaches the end of its animation, where the needle "pops" to roughly 1,000 PSI and then back to zero as more of a flicker, there is no smooth transition from a zero reading to 1,000. It's on and off. It's not game-breaking in any way, I can wobble pressure in and the cowl flaps open, I just think the coding behind the gauge is a little screwy :thumbup:

 

Also, this may be colloquial and perhaps isn't a bug but right now the cowl flaps only seem to open halfway. I have more sim hours spent in the A2A P-47D-20, and perhaps the flaps operated differently in the earlier blocks, but I have included a picture of the flaps at near full-open for reference.

EDIT: I will also add the cowl flaps once hydraulic pressure is in the system and holding, move very slowly. I know that in the real aircraft, you can only hold the cowl flaps lever as far out as you need it and full deflection on that lever would open and close them very quickly, but the action time could be decreased slightly and still be manageable.

 

Thats my two squawks for now.

I love this bird, thank you for your hard work, it flies like a Jug should!

Edited June 4, 2020 by Sledgehammer427

[streakeagle]

If you want to see the pressure indicate correctly, put the flaps lever to neutral before you start pumping. From a cold start, the flaps are drooping all the way down. With the lever in the "up" position, the flaps will be soaking up all that hydraulic pressure. With flap lever placed in the neutral position, the pressure charges up and you can move the cowl flaps.

[Eldur]

Noticed the cowl flaps not open up as much as in that other sim in the preview videos already and TBH my first thought was just the other sim was wrong then. Apparently it's not.

[TacticalOni]

Noticed the cowl flaps not open up as much as in that other sim in the preview videos already and TBH my first thought was just the other sim was wrong then. Apparently it's not.

 

Yeah, I have about 300 hours in the A2A accu-sim razorback (I'm still frustrated that all these P-47s abound and none of them are razorbacks, my preferred variant) and it was the first thing I noticed when I watched Spud's video. He's like "and I'm going to open the cowl flaps all the way" and I immediately said to myself "that's not enough" and hoped it was just him being impatient.

 

If you want to see the pressure indicate correctly, put the flaps lever to neutral before you start pumping. From a cold start, the flaps are drooping all the way down. With the lever in the "up" position, the flaps will be soaking up all that hydraulic pressure. With flap lever placed in the neutral position, the pressure charges up and you can move the cowl flaps.

 

ah, I hadn't thought of that, but the way the needle acts is still not right, if the system was pressurized enough to hold the flaps up, then the first pump should bring it up to the green and hold it there if it wasn't in the green to begin with, not flickering back and forth between 0 and 1,000.

 

I dunno, I'll play with it more

[Legioneod]

I thought it was just me, I noticed they wouldn't open fully but just figured it was the way I was sitting or my viewpoint.

[Art-J]

@Sledge - One could argue that your reference photo isn't good enough, depicting B-29. Find the one with P-47 and now we're talking :D.

 

Seriously though, that was indeed one of things that caught my attention as well, but I'm not qualified to say if it's accurate or not.

Edited June 5, 2020 by Art-J

[-0303-]

On 6/4/2020 at 3:18 PM, Sledgehammer427 said:

EDIT: I will also add the cowl flaps once hydraulic pressure is in the system and holding, move very slowly. I know that in the real aircraft, you can only hold the cowl flaps lever as far out as you need it and full deflection on that lever would open and close them very quickly, but the action time could be decreased slightly and still be manageable.

Are you saying the speed of cowl flap opening / closing depends on far the lever is pulled out or pushed in? If so, is that documented somewhere (like pilots manual)?

 

 

Edited December 31, 2020 by -0303-

[Tiger-II]

I see the same thing with the hydraulics. It jumps from zero to 1000 psi.

[NineLine]

Hydraulic system still needs some love.

[gulredrel]

@NineLine

Still an issue in DCS/2.8.5.40170 (x86_64; MT; Windows NT 10.0.19045)

So I guess still WIP?

So these threads are also related to the hydraulic system:

 

[Oreo147]

The P-47 has a number of issues, including this one that desperately needs to be looked at IMO. I'm sure that the devs are busy but with the Normandy 2.0 release the Juggernaut could use some love! The texture for the gunsight on the external model is also broken. Some communication would really be appreciated @BIGNEWY@NineLine and others

[ThorBrasil]

Please ED! Look at the P-47! Thank you!

[NineLine]

We still plan to model the hydraulic system, but I do not have a timeline sorry.