india DGCA ATPL exam
Join Date: May 2011
Location: new delhi
Posts: 37
Likes: 0
Received 0 Likes
on
0 Posts
a quick question to keith williams, in the keith williams instrument question bank, ASI1, barber`s pole indicate temperature and VMO . and in airspeed 20, red and white hatched pointer indicates VMO VERSUS ALTITUDE and not VMO VERSUS TEMPERATURE.
Question ASI 1 asks what is indicated by the “Barbers’ Pole”. The first three options (MMO, Vne and TAS) are all incorrect. The fourth option “temperature and VMO” is partly correct, in that the Barbers’ Pole does indicate VMO. So this is the best option in this question.
Question AIRSPEEDS 20 also asks what the Barbers’ Pole indicates. In this question the first two options relate to the autothrottle, so they are incorrect. The third and fourth options are “Maximum speed in VMO operation versus altitude” and “Maximum speed in VMO operation versus temperature”.
To select the best option we need to consider how the Barbers’ pole will respond as an aircraft climbs to altitude.
Between ground level and the altitude at which VMO is equal to MMO, the air temperature will decrease, causing the TAS and CAS values of MMO to decrease. But at these low altitudes MMO is considerably greater than VMO, so the reducing temperature will have no immediate effect on the Barbers’ Pole indication. But increasing altitude will also cause the air pressure and air density to decrease. This will increase the value of CAS at any given EAS. The pressure loads acting on the aircraft are determined by EAS, so the CAS value of VMO will increase slightly. This increase will be very small so the movement of the Barbers’ pole may be negligible. So overall, in this part of the climb altitude will increase, temperature will decrease, but there will be no significant movement of the Barbers’ Pole.
As the climb continues above the altitude at which VMO is equal to MMO, the decreasing temperature will cause the TAS value of MMO to decrease. The reducing air pressure and density will also cause the CAS at any given TAS to decrease. The overall effect will be that the Barbers’ Pole indication will decrease. So overall in this part of the climb altitude will increase, temperature will decrease and the Barbers’ pole indication will decrease.
As the aircraft climbs above the tropopause the temperature will remain constant. This will cause the TAS value of MMO to remain constant. But the reducing air pressure and density will cause the CAS at any given TAS to decrease. So the Barbers’ Pole indication will continue to decrease. So overall in this part of the climb the temperature will be constant, while the altitude increases and the Barbers’ Pole indication decreases.
The above discussion shows that movement of the Barbers’ Pole is related to temperature only at altitudes between that at which VMO = MMO and the tropopause. But the relationship between altitude and the position of the Barbers’ Pole is evident over a much wider altitude range.
Question AIRSPEEDS 20 also asks what the Barbers’ Pole indicates. In this question the first two options relate to the autothrottle, so they are incorrect. The third and fourth options are “Maximum speed in VMO operation versus altitude” and “Maximum speed in VMO operation versus temperature”.
To select the best option we need to consider how the Barbers’ pole will respond as an aircraft climbs to altitude.
Between ground level and the altitude at which VMO is equal to MMO, the air temperature will decrease, causing the TAS and CAS values of MMO to decrease. But at these low altitudes MMO is considerably greater than VMO, so the reducing temperature will have no immediate effect on the Barbers’ Pole indication. But increasing altitude will also cause the air pressure and air density to decrease. This will increase the value of CAS at any given EAS. The pressure loads acting on the aircraft are determined by EAS, so the CAS value of VMO will increase slightly. This increase will be very small so the movement of the Barbers’ pole may be negligible. So overall, in this part of the climb altitude will increase, temperature will decrease, but there will be no significant movement of the Barbers’ Pole.
As the climb continues above the altitude at which VMO is equal to MMO, the decreasing temperature will cause the TAS value of MMO to decrease. The reducing air pressure and density will also cause the CAS at any given TAS to decrease. The overall effect will be that the Barbers’ Pole indication will decrease. So overall in this part of the climb altitude will increase, temperature will decrease and the Barbers’ pole indication will decrease.
As the aircraft climbs above the tropopause the temperature will remain constant. This will cause the TAS value of MMO to remain constant. But the reducing air pressure and density will cause the CAS at any given TAS to decrease. So the Barbers’ Pole indication will continue to decrease. So overall in this part of the climb the temperature will be constant, while the altitude increases and the Barbers’ Pole indication decreases.
The above discussion shows that movement of the Barbers’ Pole is related to temperature only at altitudes between that at which VMO = MMO and the tropopause. But the relationship between altitude and the position of the Barbers’ Pole is evident over a much wider altitude range.
Join Date: Feb 2011
Location: VT
Age: 37
Posts: 244
Likes: 0
Received 0 Likes
on
0 Posts
R k bali- 2010 or 2012?
Hey all,
Trying to find some good study material for Air regs.
Is R K Bali is still the best book to go read?
If yes- which edition would you recommend 2010 or 2012?
cause often the older editions are more useful but the 2012 edition might be more thorough.
Please advise.
Any other book you guys are studying for Air Regs?
Kindly reply ASAP.. help is always appreciated.
Regards,
Cactus
Trying to find some good study material for Air regs.
Is R K Bali is still the best book to go read?
If yes- which edition would you recommend 2010 or 2012?
cause often the older editions are more useful but the 2012 edition might be more thorough.
Please advise.
Any other book you guys are studying for Air Regs?
Kindly reply ASAP.. help is always appreciated.
Regards,
Cactus
Join Date: Feb 2012
Location: India
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
Question on VSI
Please expain me the answer to this question. I'll be really thankful. 
Because the VSI measures the rate of change of static pressure and not actual values of static pressure, position error :
a) never affects VSI indications.
b) only causes errors in the VSI during take-off.
c) causes errors in the VSI indications whenever airspeed is changed, if at the same time there is a change in position error.
d) causes errors in VSI indications whenever airspeed is changed, even if there is no change in position error.
According to book (b) is correct. But i think (d) should be the correct option. I know the error is most noticeable during the take-off phase but error should also occur everytime the airspeed is changed. Not just during the take-off phase.
Because the VSI measures the rate of change of static pressure and not actual values of static pressure, position error :
a) never affects VSI indications.
b) only causes errors in the VSI during take-off.
c) causes errors in the VSI indications whenever airspeed is changed, if at the same time there is a change in position error.
d) causes errors in VSI indications whenever airspeed is changed, even if there is no change in position error.
According to book (b) is correct. But i think (d) should be the correct option. I know the error is most noticeable during the take-off phase but error should also occur everytime the airspeed is changed. Not just during the take-off phase.
Join Date: Jul 2010
Location: Mumbai
Age: 34
Posts: 120
Likes: 0
Received 0 Likes
on
0 Posts
@ acousticlag
VSI consists of i) capsule which is directly connected to the static port and ii) case which is fed with delayed static pressure caused by the metering unit.
Referring to option D)
As VSI measures rate of change of static pressure, if the airspeed is changed and it causes a change in static pressure, the same 'changed' pressure will be fed to the case and the capsule so there will be NO DIFFERENTIAL PRESSURE to cause an error in indication.
When the aircraft is close to the ground, due to ground effect there is slight increase in local static pressure which causes errors during take off and landing.
So B) is the best option.
Referring to option D)
As VSI measures rate of change of static pressure, if the airspeed is changed and it causes a change in static pressure, the same 'changed' pressure will be fed to the case and the capsule so there will be NO DIFFERENTIAL PRESSURE to cause an error in indication.
When the aircraft is close to the ground, due to ground effect there is slight increase in local static pressure which causes errors during take off and landing.
So B) is the best option.
Join Date: Feb 2012
Location: India
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
@gamble3
The instrument case is fed with delayed static. And the capsule is fed with current static. So if speed is suddenly changed; due to the position error, there should be differences in pressure in the capsule and the instrument case at that very instant. So VSI should indicate a rate of change.?
The instrument case is fed with delayed static. And the capsule is fed with current static. So if speed is suddenly changed; due to the position error, there should be differences in pressure in the capsule and the instrument case at that very instant. So VSI should indicate a rate of change.?
Join Date: Jan 2011
Location: mumbai
Age: 36
Posts: 236
Likes: 0
Received 0 Likes
on
0 Posts
hi all, the application for april attempt can be submitted by 23rd of this month.
but when you select atplG as the exam its shows 4 subjects, including regs.
so has regs been added from this time onwards?
but when you select atplG as the exam its shows 4 subjects, including regs.
so has regs been added from this time onwards?
Join Date: Sep 2011
Location: ZZZZ
Age: 24
Posts: 69
Likes: 0
Received 0 Likes
on
0 Posts
@bayblade
the first oral is indeed free.
the candidates who clear the written get the date for the first oral (on the dgca website). If they don't clear the oral, the 2nd time they have to make another DD for Rs 500/- and same for the 3rd time.
Regs is for ATPLCG. You don't have to appear for it if you have an Indian CPL.
the candidates who clear the written get the date for the first oral (on the dgca website). If they don't clear the oral, the 2nd time they have to make another DD for Rs 500/- and same for the 3rd time.
Regs is for ATPLCG. You don't have to appear for it if you have an Indian CPL.
Join Date: Jun 2011
Location: India
Posts: 20
Likes: 0
Received 0 Likes
on
0 Posts
Documents to be submitted???
Hi all
Can anybody tell what all documents one need to send along with the print out of the application for atpl online exam??do we need to attest them all aswell??
The Udaan website says a lot of docs..just want to confirm???
Can anybody tell what all documents one need to send along with the print out of the application for atpl online exam??do we need to attest them all aswell??
The Udaan website says a lot of docs..just want to confirm???
like what???