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Search: Posts Made By: blackmail
Showing results 1 to 35 of 194
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Forum: Questions
7th Nov 2020, 01:03
Replies: 14
Views: 3,886
Posted By blackmail

Cool Lift Coefficient

Hello All,

Along time ago, the 4 turboprop engined Breguet 941 had a blown high wing with 4 immense propellers(4m diameter each) for a half wing span of 9,88m. The 4 propellers were driven by one...
Forum: Questions
27th Aug 2018, 19:42
Replies: 2
Views: 1,426
Posted By blackmail

Hello Fly.b737 FL090 = 9000ft indicated, with...

Hello Fly.b737
FL090 = 9000ft indicated, with 1013.25hpa in your altimeter window. Now remember the rule "from high to low(pressure) and from warm to cold(temperature) => look below"
So your...
Forum: Tech Log
16th Nov 2015, 09:39
Replies: 11
Views: 3,501
Posted By blackmail

Hello Pwmdk, 737-300 +winglet :span =...

Hello Pwmdk,
737-300 +winglet :span = 31.11m(non winglet : span = 28.88m). Mac = 3.41m
gross wing surface : S = 105.4m2

aspect ratio = span/mac or span2/S
I let you do the math

have a nice...
Forum: Professional Pilot Training (includes ground studies)
6th Dec 2014, 10:44
Replies: 6
Views: 4,640
Posted By blackmail

mach ?

Hello Alex,
there is a formula : EAS = 661xMxroot of greek letter delta
delta= pressure ratio P/Po
at fl100 P= 700hpa(see wx charts)
at sea level Po=1013hpa
700/1013=0,69 => square root= 0,83...
Forum: Tech Log
23rd Jun 2012, 07:34
Replies: 8
Views: 7,692
Posted By blackmail

hello 172 driver, you correct the V1mcg, not the...

hello 172 driver, you correct the V1mcg, not the normal V1.
there is a note in the preamble stating that V1mcg tables are conservative figures for all weight & bleed configurations. so I suppose the...
Forum: Tech Log
19th Apr 2011, 10:51
Replies: 17
Views: 3,781
Posted By blackmail

supersonic aerodynamics

JD,
it might be the formula of Raleigh for supersonic speeds :

Pt-p/p =[ 166,92158M^7/(7M^2-1)^2,5]:cool: -1

Pt = Total Air Pressure
p = Static Air Pressure
M^7 = Mach to the power 7
M^2...
Forum: Tech Log
4th Oct 2010, 18:34
Replies: 6
Views: 9,392
Posted By blackmail

twin otter aft fuel tank

hello firestorm,
good remark about the "holes" of phu & his flapper valves. but i thinks the "holes" makes sense as it ensures a fuel feed to the collector tank(cell 5) from the other cells. assume...
Forum: Tech Log
4th Oct 2010, 16:28
Replies: 6
Views: 9,392
Posted By blackmail

twin otter aft fuel tank

hello phu, the short answer is : pitching moments, gravity & fuel sloshing. the fuel tanks of the twin otter are mounted in tandem in the fuselage & have pitching moments around the center of...
Forum: Tech Log
9th Sep 2010, 10:48
Replies: 4
Views: 6,540
Posted By blackmail

aircraft categories

hello all,

B737-800 is normally cat C aircraft, so cat C minimas apply, except for a circling approach single engine(avoid this, if at all possible), where cat D minimas apply due to higher Vref...
Forum: Tech Log
7th Sep 2010, 18:54
Replies: 10
Views: 2,478
Posted By blackmail

ATPL perfo

hello all,
checking all the different opinions & theories, all correct, there seems to be no consensus on what is the correct answer to this question.
so let's analyse two different scenarios : 1)...
Forum: Tech Log
21st Aug 2010, 18:43
Replies: 19
Views: 7,485
Posted By blackmail

b738 pressure

robin,
it would help, if you try to write correct english, given or taken a few typo's, :rolleyes:
bm,
Forum: Tech Log
21st Aug 2010, 11:18
Replies: 19
Views: 7,485
Posted By blackmail

b738 pressure

robin,
for the last time : flight altitude(not "land" altitude) set on the pressurzation panel, should never be lower than actual flt altitude. if it is, the delta pressure will eventually go up to...
Forum: Tech Log
21st Aug 2010, 05:27
Replies: 19
Views: 7,485
Posted By blackmail

b737 presurization

robin,
it was not. 1) it was not in the QRH. 2) a flight altitude equal to actual altitude would be ok to avoid the unscheduled pressurization caution light, when initiating a descent, but not lower...
Forum: Tech Log
20th Aug 2010, 20:29
Replies: 19
Views: 7,485
Posted By blackmail

b737 presurization

robin,
if you stop the climb of the aircraft, the cabin altitude stops climbing & the delta pressures stops as well.
bm
Forum: Tech Log
18th Aug 2010, 21:03
Replies: 19
Views: 7,485
Posted By blackmail

b737 presurization

hello housecarl,
i would suggest : 1) follow QRH & don't invent new or home made procedures. 2) maybe i'm missing something, but i would think the flight altitude on the pressurization panel should...
Forum: Tech Log
15th Jul 2010, 10:52
Replies: 9
Views: 8,397
Posted By blackmail

Cool Tat & Rat

Hello Studentpilot,

to complete above posts good replies, see following formulae :
assume r = Ram recovery factor, with r equal or less than one(1).
Temperatures (Tt & T) are absolute...
Forum: Tech Log
21st Apr 2010, 09:16
Replies: 10
Views: 2,351
Posted By blackmail

ceilings

hello agus,

keep it simple : any powered aircraft has amongst other things : wings(2) & engine(s), so you have a max. altitude for the wings(aerodynamic ceiling) & a max. altitude for the...
Forum: Questions
19th Apr 2010, 20:08
Replies: 5
Views: 14,677
Posted By blackmail

B738 sweep

hello agus,
sweep angle is all about performance compromise.
increase in sweep angle, increases Mach critical(sonic point on the wing) so allowing increased cruise Mach numbers but the downside is...
Forum: Tech Log
28th Jan 2010, 16:20
Replies: 12
Views: 30,505
Posted By blackmail

cold wx altimeter corrections

hello all,
correction rule for cold wx is : 4 FEET per °C isa deviation per 1000ft OR 1% per 2.5°C isa deviation, both rules give same result.
take FL180 & isa - 10°C gives 4ft x 10 x 18 = 720ft or...
Forum: Questions
14th Jan 2010, 12:22
Replies: 7
Views: 2,243
Posted By blackmail

flight planning

itopalov : jepp charts not maps !
bm.:rolleyes:
Forum: Tech Log
6th Jan 2010, 08:16
Replies: 15
Views: 3,658
Posted By blackmail

bypass ratio

hello all,
the bypass ratio, because it is a ratio or a fraction, by definition has no units.
eg. a bypass ratio(called the greek letter of lambda) of 8, means that for 1 unit of air going through...
Forum: Tech Log
17th Dec 2009, 07:30
Replies: 14
Views: 5,152
Posted By blackmail

b737ng fmc

hello all,

maybe the answer lies in Mr. boeing fcom vol 2. page 11.43.3, april 24, 2009.
descent page.
quote : "Speed restrictions (spd rest) : displays the most restrictive of the following...
Forum: Tech Log
11th Nov 2009, 14:17
Replies: 2
Views: 6,108
Posted By blackmail

acn/pcn

hello all,
nope, jepp is correct, but look the info up in airport directory,
greetings,
bm:):)
Forum: Tech Log
5th Jun 2009, 15:00
Replies: 4,593
Views: 3,283,649
Posted By blackmail

AF447

c.tocross,

4 minutes.
bm.
Forum: Tech Log
24th Feb 2009, 14:50
Replies: 8
Views: 1,521
Posted By blackmail

Cool V1 & N-1

hello every one,

"N-1" is just an old french arithmetic terminology to indicate an engine failure : N=nombre(total number of) de moteurs (engines) "-"=moins(minus) 1(one)moteur (engine). eg a...
Forum: Tech Log
7th Feb 2009, 21:35
Replies: 35
Views: 11,479
Posted By blackmail

cat2&3

hello,
in one of our airfield briefings we have, quote : "during LVP(Low Visibility Procedures), ATIS/TWR will report either cat2 or cat3 in operation according to limiting weather at the time,...
Forum: Tech Log
15th Jul 2008, 13:48
Replies: 19
Views: 7,874
Posted By blackmail

Cool ias vs Mach

hello every one,

there is an easy formula that says it all. but first an assumption : forget the "position error" between ias(indicated airspeed) & eas(equivalent airspeed resulting from pitot...
Forum: Rumours & News
23rd Apr 2008, 10:17
Replies: 15
Views: 4,488
Posted By blackmail

stn rwy blocked

gear problems seems to haunt sas ?
Forum: Tech Log
12th Mar 2008, 11:30
Replies: 5
Views: 5,809
Posted By blackmail

vibal

hello everyone,

VIBAL = (french) & means : " VIsualisation BALises " = human observation of rvr along the rwy by counting the rwy lights(balises) visible when no electronic rvr is available.
...
Forum: Rumours & News
28th Oct 2007, 19:11
Replies: 19
Views: 9,860
Posted By blackmail

slippery rwy's

hello everyone,

without wanting to give any lesson to anyone or being pedantic, here is an advice i came across some years ago, regarding vacating slippery rwy's : suppose you have made a...
Forum: Tech Log
27th Oct 2007, 16:31
Replies: 2
Views: 1,081
Posted By blackmail

autothrust

hello el#
in light to moderate turbulence the system autothrust/autopilot can cope with the situation, although at a higher pace, eg : more frequent thrustlever movements resulting in a less...
Forum: Aviation History and Nostalgia
19th Oct 2007, 11:51
Replies: 121
Views: 31,306
Posted By blackmail

vulcan air displays

hello every one,

what strikes me in viewing different air display videos of this magnificent aircraft, is the professionalism of the display flying by the raf crews, compared to the tap a310...
Forum: Tech Log
10th Oct 2007, 17:13
Replies: 17
Views: 3,984
Posted By blackmail

b737ng flap load relief

forget, hello,

placard flap speed for flap 30 = 175kias & for flap 40 = 162kias ( b738ng)

boeing manual says: when flaps are set at 40, the TE flaps:
-retract to 30 if speed exceeds 163kias &...
Forum: Tech Log
10th Oct 2007, 14:10
Replies: 17
Views: 3,984
Posted By blackmail

b737ng flap load relief

hello everyone,

if the flap load relief system works as advertized, it is still a flap speed exceedance as said in another post & although no harm is done it nevertheless needs a techlog entry &...
Forum: Tech Log
9th Oct 2007, 21:45
Replies: 29
Views: 5,168
Posted By blackmail

a-330 in gse

hello everyone,

in our airfield brief for gse it is mentioned that although the pavement classification number(pcn) is low, local authorities do not impose any weight restrictions on our...
Showing results 1 to 35 of 194
 
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