Ok. Is this possible IRL? No fuel 12.9nm [Drag related]

[Czar66]

[This post is entirely directed towards clarification about the real aircraft performance versus simulated in this module out of curiosity. I do have the knowledge it's beta and I'm aware on future improvement.]

 

While completing the first mission on missions section of the Sabre aircraft in DCS I got home with no fuel nor power. I ran out of fuel at 275ft, 12.9nm from home airbase at it's heading and my engine shut down. Start of RPM's decline moment speed [549.9 TAS] [534.4 IAS]; data recorded by tacview.

 

I pulled up a little immediately after noticing loss of RPM just as my experience in sims taught me.

 

The thing is: I made it home.

 

Is this possible? :noexpression:

 

Tracks and screens attached.

 

(somehow i'm unable to upload the tacview .acmi track on this post. I will see if able to do it later)

no fuel SABRE.trk

Edited January 12, 2015 by Czar66

[Czar66]

ok I made it upload.

 

Tacview track

Tacview-20150111-210712-DCS.rar

[ricktoberfest]

With the speed you had I could see making it that far. There is a problem with the f86, but I think it's related to engine thrust at idle, not drag while dead stick.

[Czar66]

With the speed you had I could see making it that far. There is a problem with the f86, but I think it's related to engine thrust at idle, not drag while dead stick.

 

It was really strange. Maybe has something to do with drag at low speeds.

The fighter felt like it wouldn't slow down. At 140 kts I noticed little to no deceleration. It was very weird this performance when in control.

 

Maybe something to get used to (positively) or looked into a latter date. In hope to be the first. I've always thought about the F-86f as not a good glider at all. lol

 

Thank you

 

Good Flying

Edited January 12, 2015 by Czar66

[SDsc0rch]

when i was a kid i read a lot of fighter pilot stories

 

and i remember reading about korean war pilots gliding long distances from high alt back to friendly territory

 

my initial inclination therefore.. yeah, i think its possible

 

the f-86 had a great glide ratio

[Brisafresca]

Hi

 

It is possible if you maintain high speed, I tried out the ditching procedure and fly low at 185kts IAS and traveled somes milles.

 

 

 

 

 

The correct procedure is release external stores and pull up inmediately after engine dead and when your speed is 185kts finish climb, next step is descent glide with engine windmilling, maintain 185kts IAS with speed brakes in, flaps and gear up, now the milles in windmilling depent of your altitude and speed.

 

 

It is real, BST F-86 can travel 115nm with engine dead glide from 50.000ft, I did.

 

regards

 

Brisafresca

[Korn]

Best glide ratio is 14 to 1 (@185 knots IAS) according to the rl manual (section 3-3).

 

Therefor in order to glide 12.9nm you need to be at an altitude of 0.92nm (~5600 feet) @185 knots IAS. With your 550 knots TAS you can climb ballistically (ignoring friction) to an altitude of ~12950 feet retaining a speed of 185 knots (TAS), unless i really messed up my calculations due to multiple transformations to metric and back.

 

So even with friction (very significant at high speeds like the initial one) looks to me like you can rather easily reach the required 5600 feet @185 IAS which will give you the necessary height to make that distance at best glide ratio.

[Czar66]

Hi

 

It is possible if you maintain high speed, I tried out the ditching procedure and fly low at 185kts IAS and traveled somes milles.

 

 

 

 

 

The correct procedure is release external stores and pull up inmediately after engine dead and when your speed is 185kts finish climb, next step is descent glide with engine windmilling, maintain 185kts IAS with speed brakes in, flaps and gear up, now the milles in windmilling depent of your altitude and speed.

 

 

It is real, BST F-86 can travel 115nm with engine dead glide from 50.000ft, I did.

 

regards

 

Brisafresca

 

Amazing Brisafresca! I would've looked after this chart forever. Thank you for the data.

 

when i was a kid i read a lot of fighter pilot stories

 

and i remember reading about korean war pilots gliding long distances from high alt back to friendly territory

 

my initial inclination therefore.. yeah, i think its possible

 

the f-86 had a great glide ratio

 

Nice. I had no idea. For a swept wing jet fighter from the 50s I was surprised on how it handled no engine flight. Nice to learn these stuff with the sim when it's correct to reality. That's a money worth flight I had. :smilewink:

 

Best glide ratio is 14 to 1 (@185 knots IAS) according to the rl manual (section 3-3).

 

Therefor in order to glide 12.9nm you need to be at an altitude of 0.92nm (~5600 feet) @185 knots IAS. With your 550 knots TAS you can climb ballistically (ignoring friction) to an altitude of ~12950 feet retaining a speed of 185 knots (TAS), unless i really messed up my calculations due to multiple transformations to metric and back.

 

So even with friction (very significant at high speeds like the initial one) looks to me like you can rather easily reach the required 5600 feet @185 IAS which will give you the necessary height to make that distance at best glide ratio.

 

Interesting! I am a lot more conscientious about what happened and less skeptical. I had little to no knowledge about Sabre performance other than some gameplay on MiG Alley sim title back in the days.

 

I did not climb that much, but with these data on the side supporting such performance I can see it now. These kind of things, at least for me, gets my money worth out of the module purchase. Good stuff!

 

Thank you all for these awesome replies!

 

Good flying you all.

Edited January 14, 2015 by Czar66