Questions tagged [wind]
The flow of air with respect to the ground. This will affect the performance and handling of aircraft and can be a limiting factor.
169 questions
6
votes
1
answer
326
views
Turn radius & Winds for outbound leg calculation (IFR holding)
I am trying to construct a mathematically precise holding calculator using Excel.
The more I work on it the less I feel I know, as I begin to disregard the good, but less accurate approximations I ...
- 157
4
votes
1
answer
291
views
Calculating wind components and ground speed
I am trying to make a holding calculator EXCEL sheet for my IR which gives me the times and headings to fly. This requires an accurate idea of the wind to get it right of course. I have tried making ...
- 157
12
votes
3
answers
3k
views
Is a massive solar farm around the runway a big risk for takeoff and landing?
The Swedes build a massive solar farm just around the runway, see e.g.
https://www.alight-energy.com/en/100-mwp-hultsfred-solar-farm-commissioned-swedens-largest-solar-...
- 535
0
votes
1
answer
130
views
Wind tunnel speed and RPM combination
I am about to perform wind tunnel experiments where i have a scaled aircraft model with active propeller. I am facing difficulty in deciding whether should i keep a unique tunnel speed and RPM ...
- 69
4
votes
1
answer
513
views
Correct Vref additive on B737 NG
On the B737 NG, the Vref additive for approach is made by taking half of the steady headwind component + the full gust value (never lower than +5kts and max. +15kts). Landing Runway 29 Wind 27010G20 ...
- 183
12
votes
1
answer
3k
views
Why starting a jet engine is not recommended in tailwind conditions
I am wondering why it is not recommended to start a jet engine with tailwind, especially when OAT is high. I heard that it may cause EGT exceedence but I don’t understand why. Please help me out.
- 2,227
2
votes
1
answer
2k
views
How to calculcute variation and compass deviation in this CDMVT problem?
Usually I can solve CDMVT problems, but sometimes I feel I'm missing something important. For example:
I'm able to solve:
Given WCA -012, TH 125, MC 139, DEV 002E. What are TC, MH and CH?
...
- 21
3
votes
2
answers
244
views
Engineless Blimp Navigation System
I understand wind direction can vary in a column of air? With only altitude control on a blimp to navigate for long flights, a blimp in theory could navigate without engines. In order to take real ...
0
votes
1
answer
80
views
Why would there be a drag discrepency when simulating transonic flow over scaled CRM geometry?
I have a discrepancy when simulating a wind tunnel experiment of a 2.7% scaled NASA CRM geometry as used in the wind tunnel.
I am trying to replicate exactly the wind tunnel model and flow conditions ...
1
vote
1
answer
245
views
What are all the ways that wind velocity can affect a paraglider/ canopy before it touches the ground?
Let's assume that a "perfect" humanoid robot flying a ram air parafoil (paraglider or canopy) performs some maneuver for landing exactly the same way multiple times.
The only difference ...
- 344
1
vote
2
answers
779
views
The role of accurate DES FORECASTS for descent planning in VNAV, during the latter stages of an approach
Giving an accurate set of criteria in the “DES FORECASTS” page of the FMC helps produce an accurate descent path.
Typical Descent Profile, Vertical Path
Adjusting the “TAI ON/OFF” (Thermal Anti Ice), “...
- 3,590
11
votes
7
answers
6k
views
Are flights in fast jet streams more dangerous?
This article from Not the Bee (note that this is a right-wing site, and the article includes a paragraph making fun of diversity, equity, and inclusion initiatives, so don't click the link if that ...
- 7,167
10
votes
2
answers
3k
views
What is the downwash speed on a typical helicopter?
On a typical 2 or 4 seat helicopter like a Robinson R22/R44, at full throttle at 20ft ASL, if you put a Wind Speed Meter/Anemometer about 10ft below the blades and halfway along a rotor blade's span, ...
- 8,485
1
vote
1
answer
208
views
What determines the active runway and is crosswind or headwind with crosswind better?
Today I read the METAR for Mumbai airport (VABB) and it goes like this
VABB 180730Z 23007KT 3000 HZ NSC 28/14 Q1013 NOSIG
Here the wind is 07 knots from 230, so if ...
- 5,521
4
votes
3
answers
2k
views
What is the effect of wind on altimeter reading?
I am wondering is there any effect from wind on the altimeter reading?
I think when the wind is blowing, the static pressure around the aircraft in flight will somehow change and this can impact the ...
- 791