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Glide ratio for a Yak-50??

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HawkerPilot2015

Joined: 10 Jan 2006
Posts: 503

Posted: Mon Apr 03, 2006 1:03 pm Post subject: Glide ratio for a Yak-50??

Is this info even published anywhere? How about the glide ration of the Yak-52...I need something close to the -50 if I cannot get the -50's info.



Tim

gus.fraser(at)gs.com
Guest

Posted: Tue Apr 04, 2006 4:38 am Post subject: Glide ratio for a Yak-50??

When your engine stops throw your keys out because that is your landing spot

))



Gus 



--

HawkerPilot2015

Joined: 10 Jan 2006
Posts: 503

Posted: Tue Apr 04, 2006 5:26 am Post subject: Re: Glide ratio for a Yak-50??

Now, just tell me how I input that into my equation?



I am using a little GPS for my PDA program called Anywhere Map that has a cone of safety feature. It will tell you if you can make an airport based on your altitude, speed, winds and glide ratio. I know, aviate, communicate, navigate. But this program may take care of the last part for me so I can concentrate on the first two!

dsavarese(at)elmore.rr.co
Guest

Posted: Tue Apr 04, 2006 5:45 am Post subject: Glide ratio for a Yak-50??

Tim,

Glide ratio for the 52 is approximately 5 to 1.  Not quite a "brick".  The 

50 should be somewhat close to that.

Dennis



---

pa3arw(at)euronet.nl
Guest

Posted: Tue Apr 04, 2006 5:50 am Post subject: Glide ratio for a Yak-50??

Tim,



It is supposed to be 1:7, i.e. you fall like a rock!



Hans

Dutch Yak Pilot

 



-----Oorspronkelijk bericht-----

Van: owner-yak-list-server(at)matronics.com

[mailto:owner-yak-list-server(at)matronics.com] Namens Tim Gagnon

Verzonden: dinsdag 4 april 2006 15:27

Aan: yak-list(at)matronics.com

Onderwerp: Re: Glide ratio for a Yak-50??






Now, just tell me how I input that into my equation?



I am using a little GPS for my PDA program called Anywhere Map that has a

cone of safety feature. It will tell you if you can make an airport based on

your altitude, speed, winds and glide ratio. I know, aviate, communicate,

navigate. But this program may take care of the last part for me so I can

concentrate on the first two!





Read this topic online here:



http://forums.matronics.com/viewtopic.php?p=26412#26412

jsfox(at)adelphia.net
Guest

Posted: Tue Apr 04, 2006 5:56 am Post subject: Glide ratio for a Yak-50??

Tim-



 From my manual.

Here are approximate gliding distance assuming nil wind, no turns  

flaps and gear up.



1,000ft - 1.0 nm

2,000ft  - 2.0nm

3,000ft -  3.5nm

4,000ft - 4.5nm

5,000ft - 5,5nm



This works out to between 5 to 1 and 6 to 1. Assuming everything is  

perfect, which it never is, so for you calculations you mat want to  

think about using  5 to 1 or possible 4.5 to 1 which would give you  

margin for winds and error.



Obviously wind strength is going to alter. A 10kt head wind is going  

to reduce available distance by 10% and each turn will reduce  

distance. A 45% degree 360 degree turn you will loose approx 750ft

On Apr 4, 2006, at 9:26 AM, Tim Gagnon wrote:



 	  Quote: 	
		   



 Now, just tell me how I input that into my equation?



 I am using a little GPS for my PDA program called Anywhere Map that  

 has a cone of safety feature. It will tell you if you can make an  

 airport based on your altitude, speed, winds and glide ratio. I  

 know, aviate, communicate, navigate. But this program may take care  

 of the last part for me so I can concentrate on the first two!





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=26412#26412

dsavarese(at)elmore.rr.co
Guest

Posted: Tue Apr 04, 2006 6:04 am Post subject: Glide ratio for a Yak-50??

Thank you Steve.  As I said.....approx. 5 to 1

Dennis



---

jsfox(at)adelphia.net
Guest

Posted: Tue Apr 04, 2006 6:20 am Post subject: Glide ratio for a Yak-50??

On Apr 4, 2006, at 10:02 AM, A. Dennis Savarese wrote:

 	  Quote: 	
		  

Thank you Steve.  As I said.....approx. 5 to 1 

Dennis 	




Dennis your email and mine crossed, had I seen yours I would have skipped the wordy explainer  In fact I would have just shut-up:)



Steve

dsavarese(at)elmore.rr.co
Guest

Posted: Tue Apr 04, 2006 6:27 am Post subject: Glide ratio for a Yak-50??

Heck, don't do that because your info was quite  valuable.  Glad you posted it.

 Dennis

  

 [quote]   ---

pa3arw(at)euronet.nl
Guest

Posted: Tue Apr 04, 2006 6:35 am Post subject: Glide ratio for a Yak-50??

Dennis,



I learned from Leonas it was 7 to 1 clean....I think the 5/6 to 1 is with

the gear down! I think the manual says 7 to 1 as well...but I could be

wrong, I never had to try it and I hope I never will...

To make sure I would calculate with 1 to 5....



Hans

 

-----Oorspronkelijk bericht-----

Van: owner-yak-list-server(at)matronics.com

[mailto:owner-yak-list-server(at)matronics.com] Namens A. Dennis Savarese

Verzonden: dinsdag 4 april 2006 16:02

Aan: yak-list(at)matronics.com

Onderwerp: Re: Re: Glide ratio for a Yak-50??




<dsavarese(at)elmore.rr.com>



Thank you Steve.  As I said.....approx. 5 to 1

Dennis



---

gus.fraser(at)gs.com
Guest

Posted: Tue Apr 04, 2006 7:01 am Post subject: Glide ratio for a Yak-50??

Do bear in mind that the cowl flaps will have an effect. Not sure about

anyone else but I definitely notice when I shut the cowl.



Gus 



--

dsavarese(at)elmore.rr.co
Guest

Posted: Tue Apr 04, 2006 7:12 am Post subject: Glide ratio for a Yak-50??

A great practice and "implant this in your brain" training flight is to 

climb to a comfortable altitude, pull the power back to idle, set up the 

airplane for best glide with the undercarriage retracted and perform a 360 

degree turn with the intent to lose as little altitude as possible while 

maintaining best glide speed and determine how many ft/meters is actually 

lost in a 180 and 360 degree turn.  Remember, this is being done under ideal 

conditions and with no stress on you whatsoever.  Once you know how many 

ft./meters is lost in the 180 and 360, implant that in your brain forever. 

Should you ever need to recall it, you'll know how many ft/meters you'll 

need to be above the terrain in an emergency to accomplish a 180 or 360 

degree turn.



On the same training flight, you can also test the straight ahead gliding 

distance using your GPS.  Pull the power to idle, set up best glide speed, 

hold heading and best glide airspeed, read your altimeter and when you have 

flown 1 mile/kilometer (per the GPS) as configured, read the altimeter. 

Continue on to the second mile/kilometer and so on and so on.  It doesn't 

matter what the book says.  It only matters what you can do with your 

airplane.  If it's 5 to 1 or 6 to 1 or 4.5 to 1, it doesn't mean diddly 

squat.  Go see what you and your airplane can achieve using the published 

best glide speed numbers under the best conditions.

Dennis



---

brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Tue Apr 04, 2006 8:15 am Post subject: Glide ratio for a Yak-50??

Hans Oortman wrote:

 	  Quote: 	
		   

 

 Dennis,

 

 I learned from Leonas it was 7 to 1 clean....I think the 5/6 to 1 is with

 the gear down! I think the manual says 7 to 1 as well...but I could be

 wrong, I never had to try it and I hope I never will...

 To make sure I would calculate with 1 to 5....


	


What I have found in doing the training in the CJ6A is that, no matter

what numbers you give them, people do not have a "feel" for the

steepness of the glide. I find that the only solution is to climb into

the airplane and experiment with all the combinations of gear and flaps

to see the impact on rate of descent in a turn (I assume that any

approach to an emergency landing area will involve a minimum of a 180

degree turn to landing). (BTW, we "prove" that flaps have more drag than

does the gear.)



I culminate the training with a series of power-off spot landings in the

pattern with various configurations. This is to show that, with gear and

flaps down, it is almost impossible to make the runway from a normal

downwind with both gear and flaps down. The Yak-52 is even worse than

the CJ6A in this respect.



So discussion is an excellent start and needs to be addressed as part of

ground training but it is *NO* substitute for going out and doing it

until the feel for the glide ratio become "muscle memory". Remember,

when the fan quits you have no time for calculations. You have to make

it work by guess and by eyeball.



Brian Lloyd

brian HYPHEN yak AT lloyd DOT com

_________________
Brian Lloyd
brian-yak at lloyd dot com
+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .
- Antoine de Saint-Exupery

pa3arw(at)euronet.nl
Guest

Posted: Tue Apr 04, 2006 8:42 am Post subject: Glide ratio for a Yak-50??

Thanks Dennis, , I'll give it a try...but I thought somebody just wanted to

have a set figure for his PDA .... but in principle y're absolutely right:

" it only depends on what I can do with my plane ". Thanks for reminding

me...



Hans

 



--

pa3arw(at)euronet.nl
Guest

Posted: Tue Apr 04, 2006 8:51 am Post subject: Glide ratio for a Yak-50??

Brian,



You are right.  I train this almost once a month thoroughly... and at our

little airfield I need to take a high downwind of 1500feet, power-off, turn

into one smooth turn directly into final, no flaps, gear down during  the

turn in to final and I can make it comfortably. I loose the 1500 ft in

approx. 2 kms.



But Dennis is right, it all depends on what you can do with your

plane...i.e. train, train



Hans

 



--

viperdoc(at)mindspring.co
Guest

Posted: Tue Apr 04, 2006 11:15 am Post subject: Glide ratio for a Yak-50??

Yeah, in the 50 she gets a lot slicker when you close the cowl flaps.

Doc

[quote] [Original Message]

 From: Fraser, Gus <gus.fraser(at)gs.com>

 To: yak-list(at)matronics.com <yak-list(at)matronics.com>

 Date: 4/4/2006 10:17:33 AM

 Subject: RE: Re: Glide ratio for a Yak-50??

 Do bear in mind that the cowl flaps will have an effect. Not sure about

 anyone else but I definitely notice when I shut the cowl.

 Gus 

 --

HawkerPilot2015

Joined: 10 Jan 2006
Posts: 503

Posted: Tue Apr 04, 2006 3:36 pm Post subject: Re: Glide ratio for a Yak-50??

Great info folks! I plan on flying the profile soon but was just screwing around with this PDA program. A few of our SoCal -50 guys have done some work with altitude loss with and without gear. They put out a nice excel sheet on the results. 



Thanks for the help!!

brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Tue Apr 04, 2006 4:39 pm Post subject: Glide ratio for a Yak-50??

Tim Gagnon wrote:

 	  Quote: 	
		   

 

 Great info folks! I plan on flying the profile soon but was just screwing around with this PDA program. A few of our SoCal -50 guys have done some work with altitude loss with and without gear. They put out a nice excel sheet on the results. 

 

 Thanks for the help!!


	


You know, you guys are talking to the biggest techno-tweak around when

you talk to me. (Well, maybe I play second fiddle to Craig in this arena

but I'm not that far back.) I play with spreadsheets and all kinds of

technical stuff.



Here's the bottom line: you can't do this technically. What your

airplane does in terms of glide has to be something that is as intrinsic

to you as your heartbeat. Numbers don't mean crap. You have to be able

to look at the ground, pull the throttle to idle, and know where you are

going to end up. You need to know how the gear, flaps, and cooling

shutters are going to tweak things. The only way you develop that sense

is to fly the airplane.



-- 

Brian Lloyd                         361 Catterline Way

brian-yak at lloyd dot com          Folsom, CA 95630

+1.916.367.2131 (voice)             +1.270.912.0788 (fax)



I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

dsavarese(at)elmore.rr.co
Guest

Posted: Wed Apr 05, 2006 3:40 am Post subject: Glide ratio for a Yak-50??

Thanks Brian for agreeing with my earlier post.

Dennis

---

brian

Joined: 02 Jan 2006
Posts: 643
Location: Sacramento, California, USA

Posted: Wed Apr 05, 2006 7:48 am Post subject: Glide ratio for a Yak-50??

A. Dennis Savarese wrote:

 	  Quote: 	
		   

 <dsavarese(at)elmore.rr.com>

 

 Thanks Brian for agreeing with my earlier post.


	


S'truth mate! I had actually written this before your posting arrived in

my m'box. Regardless, it is what it is.



Brian

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