Markus
Joined: 08 Jan 2012
Posts: 8
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 Posted: Sat Jan 11, 2014 9:11 am Post subject: Aw: Re: Re: Yak 52 maneuver speed |
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Slightly off-topic, but assuming the kph readings below are correct, then
150kph equals 81kts and
105kph equals 57kts
The rest is more or less correct.
Markus
Gesendet: Samstag, 11. Januar 2014 um 15:19 Uhr Von: "bill wade" <bwade154(at)yahoo.com> An: "yak-list(at)matronics.com" <yak-list(at)matronics.com> Betreff: Re: Re: Yak 52 maneuver speed
Found on Mark Jefferies website Basic Data Airspeeds Never exceed speed VNE 450 KPH
243 Kts Maneuvering speed 360 KPH
194 Kts Gear extension speed 200 KPH
108 Kts Flap extension speed 170 KHP
91 Kts Approach speed 150 KPH
87 Kts Stall speed 105 KPH
60 Kts
On Friday, January 10, 2014 10:12 PM, Todd McCutchan <todd(at)fastaircraft.com> wrote:
Please also keep in mind that stall speed (at least in USA aircraft) is calculated based on MTOW and farthest allowable aft CG. If you are flying at weights below MTOW the Va will also be lower as it decreases as weight decreases (rule of thumb is 1 knot per 100 lbs).
Again you can calculate this using the same formula if you know the lower Vs or if Vs is unknown for the reduced weight you can calculate using [img]cid:1.1755939441(at)web164904.mail.bf1.yahoo.com[/img]
Va would be the maneuvering speed you previously calculated based on MTOW. W2 is the current weight and W1 is the MTOW.
Cheers!
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd(at)fastaircraft.com
Skype: tmccutchan
Web: www.fastaircraft.com & www.toddmccutchanairshows.com
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Todd McCutchan Sent: Friday, January 10, 2014 7:52 PM To: yak-list(at)matronics.com Subject: RE: Re: Yak 52 maneuver speed
Maneuvering speed can be found mathematically. The formula is Vs (stall speed clean) multiplied by the square root of the g (7). If you put it into an excel formula it would be Vs*√n where n = acceleration. You can then use this to build a Vn diagram if you so choose.
Good luck!
Todd McCutchan
Fast Aircraft
T-34A & Yak-50
Cell - 260.402.1740
Email: todd(at)fastaircraft.com
Skype: tmccutchan
Web: http://www.fastaircraft.com/ & http://www.toddmccutchanairshows.com/
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