Sir,
Your description of the plane reminds me of a 2 seat plane made of wood and
using a car engine and take off from sea beach in the Malayalam film
Vimanam.The film was released during 2017.
I was thinking how the plane was made after repeated failures. A few people
pushed the plane and after a time it went high.
Thank you very much for the addition.Gopalakrishnan
On Sunday, 18 June, 2023 at 09:41:31 am IST, Narayanaswamy Iyer
<[email protected]> wrote:
Dear folks
Sri Gopalakrishnan asks:-
"Q4 - What was flying like 60 years ago?"
Sixty-five years ago I was flying a two-seater single-engined Tiger Moth
biplane with wooden propellers and rear-dragger spring-loaded traction-blade
instead of a rear wheel.
It was 29 feet 4 inches wingspan, and 23 feet 1 inch long. It had a 120
horsepower engine. Could travel 300 miles at a speed of 90 miles per hour.
It was not more expensive than a ten-horsepower family car.
One of my professional engineer friends found a crated unassembled plane in
Bangkok Airport after the war, had it transported to Singapore, and assembled
it with his engineer friends. He saved money, but it was not insured.
Instead of petrol. it flew on kerosene, which was plentiful at the airports and
the airstrips where we landed. Also much cheaper. Instead of exhausting
winding country roads, heavy and unpredictable traffic, we flew straight to our
destinations over enchanting views of land and sea, rural settlements,
overcrowded towns, neat plantations, grassy farmlands, thrilling coasts,
winding rivers.
The cockpit was open, so you had to wear windproof jacket, helmet, mask and
goggles. It had no electrical system, so had to be started by someone pushing
round the heavy wooden propeller judiciously. to avoid accidents, while the
pilot started the engine. The wings were made of fabric, to keep the aircraft
weight light.
You had radio contact with base and with our destination at all times, as well
as with nearby landing places, to divert to in case of emergency.
One of our main concerns was the weather, especially the wind.
The plane was excellently designed and extremely manoeuvrable. If the pilot
lost consciousness or lost control of the plane, and there was no co-pilot or
trained passenger to take over, the plane would correct itself, and land safely
if the ground below was grassy and without obstructions.
S Narayanaswamy Iyer
On Sat, Jun 17, 2023 at 10:28 PM 'gopala krishnan' via iyer123
<[email protected]> wrote:
CULTURAL QA 06-2023-17A
Q1 What is the effect of decreasing theresistance of a wire in an
electrical circuit?
A1 Gopala Krishnan, Former AssistantGeneral Manager 1996-2004 at
Department of Telecom (1966–2004)Just now
Recollect Ohm’s law. V= I x R. Whenresistance is reduced current flow will
increase, voltage applied being thesame. When current is increased the wire
become hot, ifinsulation is less, there are chances of fire risk. This is a
hypothetical answer.
In practicedecreasing the resistance of a wire in the electrical circuit is not
possibleunless the wire is removed and a new one is provided . One can only
reduce anyresistance connected in the circuit using a wire.
This appears asa question asked just for asking for a question.
My note- Hundreds of similar questions appears inQuora, I select informative
and interesting and simple to understand ones for myCultural QA.
Q2 What's the lifespan of a Boeing 747?
A2 Vishnu Ravi, Aviation Enthusiast |Content Creator 31m
Unlock the full potential of a Boeing 747 withthe power of meticulous care and
maintenance. The lifespan of this remarkable aircraft is influenced byvarious
factors, including its make, model, and the level of attention itreceives.
Imagine a worldwhere your Boeing 747 soars high for up to 30 years, surpassing
the average retirement age ofpassenger jets. That's right, by choosing a
trusted manufacturer, your aircraftcan be built to endure and thrive for even
longer.
But it doesn't endthere. Special inspection and maintenance programs hold the
key to extendingthe lifespan of your aircraft. By implementing these carefully
designedprograms, you can stretch its operability to approximately 30 years,
beforeeven reaching the cycle limit. It's a testament to the
unwaveringdedication to safety and excellence.
When itcomes to the number of take off and landing cycles, the
manufacturer'sexpertise is paramount.Boeing,for instance, sets an anticipated
limit of 35,000 cycles for the iconic 747. The hours spent in flight contribute
significantly to the aging process ofthe fuselage, wings, and engines, often
leading to fatigue.
However, withproper care, your Boeing 747 can conquer this challenge and
continue to performat its peak.
Whether youembark on long-haul journeys with fewer cycles or opt for short-haul
flightswith higher demands, your aircraft is designed to withstand the test of
time.
Long-haul aircraftboast a remarkable design lifespan of approximately 40,000
cycles, while short-haulcounterparts can endure up to an impressive 111,000
cycles. Just imagine the possibilities.
While a Boeing 747typically spans around 25 years, with the right approach,
this exceptionalaircraft can exceed expectations. Don't let the world's first
Boeing 747-8 BBJ, retired after only ***30flight hours and 10 years of service,
deter you. By embracing propermaintenance and inspection programs, your Boeing
747 can evolve into a timelesssymbol of endurance and reliability.
*** NOT CLEAR TO ME
In conclusion, thelifespan of a Boeing 747 is influenced by various factors,
yet with propermaintenance and inspection programs, it has the potential to
reach animpressive 30 years or more. Embrace the power of longevity and take
flightinto a future filled with unrivaled possibilities.
Q3 My PNR status is CNF/S9/56. Will myseat shuffle after the chart is
prepared?
A3 Ankit Naphade, Lives in Mumbai,Maharashtra, India Jun 7
No. It will notshuffle unless you select automatic upgrade option if available.
Even if youselect that, there is only 1% chance of upgradation. This happens
when an upperclass seat in that train is going vacant. It's rare.
The passengers whogot M coaches instead of B were different case. Recently
railways announced 3ACeconomy which is termed as 'M' coach. So they announced,
canceled and againre-announced. So that's why some people got 'M’ coaches when
they booked 3ACwith a refund also because economy fair is little bit lower than
3AC.
Concluding, youseat never changes after confirmation and it merely changes for
like 1% — 2%chances in case you have selected class upgrade option.
Q4 What was flying like 60 years ago?
A4 John Scallan, Former Radar Tech atU.S. Air Force (1974–1978)Tue
On commercial aircraft the seats were wide,the booze was cheap, thesnacks were
tasty, the flight attendants were all beautiful and friendlyfemales called
stewardesses, smoking was allowed everywhere, the customers werewell dresses
and well behaved, the cockpit was open, and you could chat withthe pilots if
you wanted.
Q5 What are some mind blowing facts thatmost people don't know?
A5 Fact sky, Answered by Krishna Kamat,5h
The total populationof Dubai is 3.4 million.More than 85 Percent of
Dubai’sPopulation Is Foreign.
Home to the World’sTallest Building (Burj khalifa).
The Dubai Miracle Garden Is the Largest Flower Garden inthe World.
The Dubai Mall isthe world's largest shopping mall.
The Dubai AquariumTank, with a capacity of 10 million litres, is the largest
suspended aquariumin the world.
The Burj Al Arab Hotel Uses Enough Gold to Cover the MonaLisa Painting 46,265
Times.
Kissing or holding hands in public is illegaland can result in fines or
deportation.
Dubai Governmenthas provided air-conditioned shelters for those waiting for
public transport.
There are ATMs in Dubai that dispense gold bars.
There is no income tax on income generated in Dubai, And nosales tax on most
goods and services.
Q6 How flexible are airplane wings?
A6 Vishnu Ravi, Aviation Enthusiast |Content Creator Jun 8
Airplane wingspossess a remarkable degree of flexibility, enabling them to bend
withoutfracturing.These wings can withstandflexion exceeding 5 meters (17
feet).
The Boeing 787Dreamliner, in particular, exhibits an exceptional level of
flexibility in itswings. This attributeallows for the absorption of load
changes and wind gusts, resultingin a smoother and less turbulent journey for
passengers. During rigorous testing, the wings of the Boeing 787 demonstrated
aremarkable upward flexion of 26 feet before reaching their breaking point.
Aircraft designerscarefully calculate the maximum stress that a wing may
encounter during flightand subsequently reinforce it to withstand an additional
50% as a safetymargin. The purpose of designing wings with flexibility is
tofunction akin to springs, reducing the perception of turbulence
amongpassengers. By flexing, the wings absorb a significant portion of
theturbulence that would otherwise be felt by passengers.
Whileflexible wings enhance the comfort of passengers by mitigating turbulence,
theyalso pose challenges to maneuverability due to the unpredictability of
wingbehavior.Anticipating the precise response of a flexible wing becomes more
complex.
Static testingplays a vital role in the wing design process. Unlike fatigue
tests thatsubject wings to operational conditions, static testing focuses
solely ondetermining the point at which a wing will bend to its breaking point.
In onesuch test, an aircraft wing surpassed its designated stress threshold by
154%before finally fracturing, reminiscent of a branch snapping.
In the fieldof aeronautics, a flexible wing refers to an airfoil or aircraft
wing capableof deforming during flight.Earlyaviation pioneers, such as those
behind the Wright flyer, harnessed theflexible properties of lightweight
constructions to manipulate flight throughwing warping.
Q7 My car started blowing white smokefrom the exhaust, but it’s not
overheating, and my mechanic told me it is fromputting too much oil in the
engine. What part am I supposed to replace?
A7 Erika Fernandez, Car Lover Jun 11
Too much oil in the engine can cause oil to leak into thecombustion chamber,
where it mixes with the air and fuel and burns along withthem. This can produce
white smoke from the exhaust,as well as other symptoms, such as reduced engine
performance, increased oil consumption, spark plugfouling, or oil pressure
warning light.
To fix thisproblem, you need to drain the excess oil from the engine and refill
it withthe correct amount and type of oil according to your owner’s manual. You
also need tocheck and replace any parts that may have been damaged or worn out
by theexcess oil, such as the valve seals, piston rings, or PCV valve.
Before youdo that, you should first drain the excess oil from the engine and
refill itwith the correct amount and type of oil. You should alsoconsult your
mechanic and have him diagnose your car properly to confirm thecause of the
white smoke.
I hope this answerhelps you to understand what part you are supposed to replace
if your car isblowing white smoke from putting too much oil in the engine.
Q7 How long does it take to fix a fallenelectricity pole?
A7 Gopala Krishnan, Former AssistantGeneral Manager 1996-2004 at
Department of Telecom (1966–2004) Just now
The question istime consumed to fix a fallen electricity pole. From the
question it is understood the post is notdamaged. The post can be of metal or R
C C.
Whatever is thetype of pole, first the EB supply has to be disconnected either
intransformer(if low voltage) or in substation if HT line. Customer feeds
aredisconnected in most cases.
The poles areraised after attendingto break of electric wires if any. Nowadays
the poles are raised mostlymechanically using bulldozer and partially by
skilled field staff. Totally mechanical LIFTING is not possible in Indian
conditions.
3–5 skilled WORKINGSTAFF, and linemen and field officer must be there. Field
officer is to attended more technical works.
The pit has to beset right, and pole has to be inserted to pit slowly and
raised slowly. Propertraffic warning has to be arranged.
The sag of electricwires have to be straightened after climbing on the post by
staff . The goingout cables/ wires to customers has to be reconnected by
linemen. Supply has to be switched ON after alltesting. Staff has to wear all
safety items and necessary tools for field work.
In Indianconditions roughly the operation takes 3–5 fours.
All the above QA are from Quora website on 17-06- 2023.
Quora answers need not be 100% correct answers .
Compiled and posted by R. Gopala krishnan, on 17-06-2023
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