DCS P51 Campaign: Mission 7: Navigation --> Fail to reach 20,000 feet

[iantron]

Sooooo 170 is Vy. That means you should be able to fly anywhere between Vx (100) and Vy and get a better climb angle than at Vy. Since the mission is based on reaching an altitude within a certain distance (not time) the easiest way to achieve that altitude should be to fly Vx, though it should take you longer to get there. If you're having problems with engine cooling at the lower speed, I would guess that there's some room to cut back the throttle and still achieve the altitude soon enough. If anything, err on the slow side of Vy. Also keep in mind that your VSI measures climb rate not climb angle, and climb angle is what's important for this mission.

 

On the other hand, from all the discussion above, it seems like you're having some other problem with engine management. Make sure you're following a good set of checklists and that you trust what the aircraft was designed to do (turbo should jump up around 20k asl). I like these checklists cause they have good quick reference for aircraft performance info (v-speeds, engine settings): http://simhq.com/forum/ubbthreads.php/topics/3633825/2GvSAP_Flea_s_P_51D_checklists

 

Basic reference: http://en.wikipedia.org/wiki/Rate_of_climb

Edited March 4, 2015 by iantron

[Barao]

Sooooo 170 is Vy. That means you should be able to fly anywhere between Vx (100) and Vy and get a better climb angle than at Vy. Since the mission is based on reaching an altitude within a certain distance (not time) the easiest way to achieve that altitude should be to fly Vx, though it should take you longer to get there. If you're having problems with engine cooling at the lower speed, I would guess that there's some room to cut back the throttle and still achieve the altitude soon enough. If anything, err on the slow side of Vy. Also keep in mind that your VSI measures climb rate not climb angle, and climb angle is what's important for this mission.

 

On the other hand, from all the discussion above, it seems like you're having some other problem with engine management. Make sure you're following a good set of checklists and that you trust what the aircraft was designed to do (turbo should jump up around 20k asl). I like these checklists cause they have good quick reference for aircraft performance info (v-speeds, engine settings): http://simhq.com/forum/ubbthreads.php/topics/3633825/2GvSAP_Flea_s_P_51D_checklists

 

Basic reference: http://en.wikipedia.org/wiki/Rate_of_climb

 

Perfect Checklist.

Nothing more to say about this, once it's PERFECT.

 

Thanks :thumbup::thumbup::thumbup::thumbup::clap_2::clap_2:

[Todd Down]

I am also having issues reaching the 20K gate Same values as captain Orso (2.7K rpm and 45-55 Hg. I am fine up to the 10K gate, I then set trim to try to maintain a rate of climb between 0.5 and 1 vsi, again ok for another 4K, but even with the Supercharger, beyond 16K I am finding it almost impossible to achieve a positive rate of climb without stalling out.

 

Driving me crazy.

[DD_Fenrir]

Mixture Control. Ensure you are in Auto not Emergency Rich

[grafspee]

if you have problem with rate of climb hit 67" 3000 rpm oil and coolant AUTO

[grafspee]

I am also having issues reaching the 20K gate Same values as captain Orso (2.7K rpm and 45-55 Hg. I am fine up to the 10K gate, I then set trim to try to maintain a rate of climb between 0.5 and 1 vsi, again ok for another 4K, but even with the Supercharger, beyond 16K I am finding it almost impossible to achieve a positive rate of climb without stalling out.

 

Driving me crazy.

 

Are you sure that you are not flying with flaps or gear deployed, are you running both magnetos not single for example, just make cockpit sweep check everything, check ram air handle position should be all way forward.

Dont go slower then 150mph

Btw supercharger is working all the time in p-51 from engine start to engine shut off

P-51 can easy stay around 2000ft/min at 46"2700 and when you are rocking 67'3000 you can be at 3500ft/min.

in climb monitor your MP it will drop pass 8k ft if you climb at speeds below 180mph.

P-51 in DCS can climb to 43k ft but you need to climb at high speed to get help from ram air

Edited November 14, 2019 by grafspee

[Todd Down]

Thanks to Tucano_uy, I read a number of posts before adding my own post describing my similar issue. When I was trying to run it again, after posting, I checked, and low and behold, my mixture was set incorrectly. I ran the mission with it then set to "Run"and got through 20K and 25 and 30K without any problems. However I was so pleased, I got turned about in the cloud and flew into a mountain - Some days are diamonds, some days are stones....:(

[Tucano_uy]

[glcollins]

Hey guys thanks for the great input, as I am also having issues and will try all suggestions. Anyway, someone has a copy of the checklist referred to in #51&52? The link has expired.

 

Thanks,

 

Lee

[iantron]

Uh not sure about the link anymore. Might have a local copy though. I'll check later.

Edited May 19, 2020 by iantron

[grafspee]

[iantron]

Unfortunately that is not the same checklist. I have a laminated copy still. It is the 2GvSAP DCS: P51D Pocket Check List Rev1.0A from 13 July 2012. I'm not having much luck finding it from that, but maybe someone from 2GvSAP (?) is around...? I'll scan if we can't find it.

[grafspee]

This check list covers all important things to set up plane properly. include before start up check list which most ppl often missing.

Any way, like it P-51 changed at all in pass 70 years :P 2012 i think is up to date enough.

Edited May 20, 2020 by grafspee

[Anatoli-Kagari9]

It's a "C" model in this video, but worth following the flow...

 

[grafspee]

It's a "C" model in this video, but worth following the flow...

 

 

Pls, don't use modern modified p-51 as reference.They differ in couple of things from war time planes.The best way is to just look at p-51 manual from wartime or 50s.

For example, counting blades is not a thing in war time p-51,it can start from very beginning of cranking. Thermostatic actuators for oil and coolant is set for lower temp then back in ww2

Edited May 20, 2020 by grafspee

[Hoirtel]

I just circled around till I had enough altitude. There's no timer.

 

That's the way I did it, just take it gently and it gets there.

[SteamyIceChest]

I flew for a long time with the mixture on full rich (several weeks) before I found out it was the incorrect setting. If you are having problems with power at altitude, and quick fuel use, that is 99% chance your problem. Even if you think you know, I’d encourage you to check and ensure you are doing it correctly if you are having these problems.

[iantron]

@glcollins here's the scanned version...https://www.digitalcombatsimulator.com/en/files/3309867/

[Moe1]

The date is now January 2025 so I’m a little late to the party! After several attempts to hit the 20,000 ft. gate, I punched my F2 button to see my external view and verify my landing gear was UP but to my surprise I saw a pair of drop tanks (fuel tanks under the wings). After clearing the 10,000 ft. gate, I jettisoned both drop tanks and found it super helpful! Now I clear the 20,000 ft. gate and start the next instructions …turn to  94 degree heading and climb to 25,000 ft. for 22 miles.

     That where I get stuck! Even at only 160 mph climb rate, 22 miles should take about 7 minutes! I’m flying 10 - 15 minutes and  never see another gate, no more instruction, …nothing! The briefing says you will be instructed to your “airport” destination. How about giving us the destination airport NAME?

Is the Airport destination so far away that I shouldn’t jettison my external tanks to reach the 20,000 ft. gate? Am I suppose to hold the 94 degrees heading longer? 20, 30, 40 minutes? Also, at 25,000 feet, I’m in and out of thin cloud layers, am I missing the gate hidden in cloud layers?

I think Charnwood is great training for student pilots but can also be frustrating … like Crosswind Take-Offs/Landings …. How about a little reference in the briefing area regarding how to crab into a crosswind? Maybe at least mention a Link to reference Crosswind Training! 

Edited January 16 by Moe1
Mis-spelled a word.

[_Hoss]

You must map the Carb Heat and Hot Air levers; they will affect MP as you go higher. You increase altitude and will see the MP drop. After the supercharger kicks in, the MP goes up. After a bit more climbing, you will see it start to drop again. The far left lever is the Carb Heat lever; if you adjust it, you will see the MP rise again. There is a tutorial on it somewhere on these forums.

If you love the Mustang, get one of these: it's the K51 trim box I have mounted on the side of the Super Taurus. The two levers coming out of the rear are perfect for those two controls. The lever closest to the throttle (left one) I have mapped to Carb Heat is the same as the one on the Mustang. It has eight Axis controls on it. The two white knobs at the rear can be pots or decoders, your choice. K51 can be found on these forums. He's in Russia, so if there are shipping restrictions, he may be unable to ship you one. I know Australia is out if you live there.

Edited January 29 by _Hoss