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SeligSIM Assignment 3

15 points
Nathan Tyler Rose
Last edited 18 days ago by Kyle Elliott Struck.

Overview

In this simulator assignment, you will learn the basics of energy management to maintain a safe speed and altitude in a standard left traffic pattern. Target speeds will follow those of the Believer to mimic the flight characteristics. Students are encouraged to complete this assignment on their own PCs, but the PCs in COMP 101 have two main advantages: higher computer specs. and access to use the Believer DATX transmitter for flight training. DATX may not be checked out, but may be used in COMP 101.

Tasks

Simulator Setup Overview

Use the following images and settings to set up your simulator. Be sure to reference
Broken link
and
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for help with setup.
Screenshot 2026-02-09 165406.png
Aircraft and environmental defaults
Aircraft: CUSTOMIZED Alpha 40, Scaled 60-size, 72-in Span (7-lb). See
Transmitter: Orqa | Be sure to calibrate
Flying Site: Frasca Airport
Sun/Sky: Whiskey Uniform
Wind: Steady Winds: 0 mph at startup
Screenshot 2026-02-09 171059.png
Flight screen must show transmitter and HUD.
Enable HUD: H
Enable Transmitter: E

Aircraft Setup

The aircraft in its current configuration is overpowered relative to the Believer. Please follow the guidance in by
to set the aircraft output to 75% of current.
IMG_0804.jpg
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Screenshot

Take a screenshot of the updated motor/engine output.

Convert and Define Speeds

The SeligSIM (at the time of writing) does not allow changing the airspeed units from miles per hour (mph). In this and all future SeligSIM assignments, we will follow and reference the Believer's airspeed settings.
Create a table (6-7 columns; 9 rows) below that shows the unit corrected speeds from the . The table must include columns for:
Parameter/condition Name
YOUR description of the parameter/condition
The description of each parameter may require some research into as well as some intuition.
V-speed (complete in )
Speed (m/s)
Speed (kts) [unless you combine the speed column and write a more complex formula]
Speed (mph).
The conversion from m/s or kts to mph MUST be completed using a formula entered into Coda. You may use AI and the Coda help docs to build your formula. Type out your formula in the callout below.
Scaled Speed (mph)
The simulator aircraft seems to work best using 70% Believer speeds. Use a formula to calculate this. =thisRow.[ColumnName]*0.7
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Conversion Table

Build and complete the required conversion table as a deliverable.
Formula:

Scaled Platform Checklist

SeligSIM speed conversion
Parameter / Condition Name
description
V-speed (m/s)
speed (kts)
Speed (mph — formula)
scaled speed
V-speed
AIRSPEED_MIN_LND
Landing stall margin speed
12
23.33
26.84
18.79
Vso — landing stall speed equivalent
AIRSPEED_APPR
Stable approach speed
15
29.16
33.55
23.49
Vapp — approach speed equivalent
AIRSPEED_MIN
Minimum cruise speed
16
31.1
35.79
25.05
Vs — clean stall margin equivalent
AIRSPEED_CRUISE
Efficient cruise speed
12
23.33
26.84
18.79
Vc — cruise speed equivalent
AIRSPEED_TKOFF
Safe climb/takeoff speed
20
38.88
44.74
31.32
Vr / Vy hybrid — rotation + climb behavior
AIRSPEED_MAX
Maximum commanded speed
38
73.87
85
59.5
Vno — normal operating limit equivalent
Stall Reference
Stall envelope baseline
20
38.88
44.74
31.32
Vs — stall reference
Cruise Reference
Typical mission cruise
20
38.88
44.74
31.32
Vc — cruise reference
Vne Reference
Never exceed equivalent speed
25.7
49.96
57.49
40.24
Vne — never exceed speed
There are no rows in this table
mph conversion: thisRow.[V-Speed (m/s)] * 2.23694
Scaled simulator speed: thisRow.[Speed (mph — formula)] * 0.7

Speed Questions

A V-speed is a specific airspeed at which an airframe achieves the best desired performance
Add a column to the table above and include V-speed indicators. There may not be an exact match, so think critically about what the parameter “speed” represents.

Traffic Pattern Diagram

Throughout the Believer flight training, you will be expected to navigate and communicate using standardized aviation language. Positional information about the aircraft will be communicated in accordance with a standard traffic pattern. That is, if your instructor commands a left turn for base, you must know what that means and execute the maneuver expeditiously and confidently. Additionally, each leg of the traffic pattern may have a different speed requirement that must be followed for successful launch, cruise, and landing.
For this task, draw and label a standard left-hand traffic pattern for the simulated Frasca Airport. Assume that the aircraft is oriented to take off on runway 09. You must label the leg name in the traffic pattern AND the desired speed for each leg. If needed, you may justify your response in the footer of your drawing.
IMG_0805.jpg
RED - UPWIND/TO - 31.32 - Vr / Vy HYBRID
YELLOW - CROSSWIND LEG - 31.32 - TYPICAL MISSION CRUISE
GREEN - DOWNIND - 31.32 - TYPICAL MISSION CRUISE
BLUE - BASE - 23.49 - STABLE APPROACH
PURPLE - FINAL - 23.49 - STABLE APPROACH
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Drawing

Traffic pattern drawing required as a deliverable.

Controls Check

Perform a controls check according to
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and answer the following questions. Remember that a control check is required before each flight.
A full upward deflection of the right stick moves which control surface and in which direction?
elevator; downward
A full rightward deflection of the left stick (at throttle idle) causes which two controls to move? What rotational motion will result from this input? Refer to the for additional information.
both the nose wheel and rudder deflect to the right

Takeoff and Energy Management

Next, you will perform an aircraft takeoff while maintaining the proper takeoff speed through the system's energy management. The Believer (and any system with a stabilized mode) has a total energy control system (TECS) algorithm built in to continually monitor and adjust the aircraft to balance its kinetic and potential energy, maintaining sufficient lift at all times. When this system is well-tuned, entering a stall condition on the Believer is very difficult (though still possible). [Optional] You may read for more information on the algorithm architecture.
Before your first recorded takeoff, answer the following. Many of these questions can be answered from the .
Under high power (i.e., during takeoff), the aircraft will experience an asymmetric condition called “P-factor.” Define P-factor and describe the control inputs required to counteract it.
P-factor is the descending blade of the propeller having a lower angle of attck, causing left turning tendencies
During the takeoff climb, power must be “pinned” fully open (i.e., throttle control stick full upward deflection) until you reach your cruise altitude and “level off.” You must maintain your takeoff speed according to your values from . What control input should you use to set your speed?
pitch for speed throttle for altitude
As you reach cruise altitude (say, 200 ft AGL), how will you need to adjust the controls to level the aircraft at 200 ft AGL while maintaining cruise speed?
lower the nose until you reach cruise speed then adjust throttle
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Screen Recording

Record the takeoff maneuver described below.
Now, perform a takeoff maneuver and achieve the following (you do not need to turn or land - you can press the ESC key to respawn at launch):
Counteract P-factor.
Control speed according to the converted values from the
Level off at a cruise altitude of 200 ft AGL.

Turns and Energy Management

After a successful takeoff, depending on the aircraft's performance before or after reaching cruise altitude, you will need to turn crosswind. There are several special considerations when turning in a fixed-wing aircraft. Answer the following questions to guide your understanding before entering a turn in the simulator. Again, many of these questions can be answered from the .
What throttle input is used during takeoff (in percentage)?
100%
What throttle input is used during cruise (in percentage)?
around 50-75%
Describe the aileron input(s) required to achieve and maintain a 20° bank.
use aileron to obtain bank angle, then return them to neutral after 20 degrees
In the 20° bank above, what will happen to the altitude of the aircraft if neither the throttle nor the pitch is adjusted?
the nose will dip towards the ground
Using the two questions above, what inputs are required to complete a turn from departure to crosswind?
aileron to begin the roll then up elevator to keep nose up
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Screen Recording

Record the turning maneuver described below.
Now, combine the procedure in and add in turns to achieve the following (you do not need to turn or land - you can press the ESC key to respawn at launch as needed):
Level off at a cruise altitude of 200 ft AGL.
Maintain cruise speed (±5 mph)
Perform all turns in the traffic pattern without gaining or losing altitude (± 25 ft)
Complete the traffic pattern two times (do not set up for landing - fly the runway at cruise altitude)

Landing Approach and Go Arounds

Now that you have mastered the takeoff, turns, and the traffic pattern, it’s time to start the landing approach. As you might have guessed, this part is also about energy management. In this case, we are looking to shed energy. In this task, you will not land, but instead complete low pass approaches to the runway while maintaining centerline AND altitude discipline before performing a go-around and reentering the pattern. Answer the following questions regarding the landing approach. Refer to the as needed.
What speed (in mph) should you target for your landing approach according to the ?
23.49
Imagine the aircraft is aligned on the centerline, and you have hit the target altitude by the final turn. Describe the shape of the aircraft as it approaches you/the touchdown point?
the aircraft is facing at you and getting larger
If you notice that, as the aircraft is approaching you, it appears to be moving lower within your reference frame, what input should you provide to stop the ascent?
if the airplane is low add power, if the airplane is high cut power
What is a flare, and what is the purpose of this maneuver?
bleed off access airspeed and slow down to minimum landing speed
At what point in the landing operation should you target the AIRSPEED_MIN_LND?
18.79
The descent requires the opposite inputs from the ascent. Describe the throttle and pitch inputs needed to transition from straight and level flight in cruise into a descent?
retard the throttle and pitch up slightly to bleed off airspeed
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Screen Recording

Record the landing approach maneuver described below.
Now, combine the procedures in , , and add in the landing approach to achieve the following (you do not need to turn or land - you can press the ESC key to respawn at launch as needed):
Level off at a cruise altitude of 200 ft AGL early in the downwind leg.
Maintain cruise speed (±5 mph)
Begin descent and target approach speed as you turn base.
Continue descent through base and target ~75-100 ft AGL as your turn final.
Continue descent, maintaining glide slope (ensure the aircraft does not move up or down in the reference frame).
As you approach the runway, stop the ascent at eye level by adding throttle.
Maintain centerline and eye level as the aircraft flies past your location.
Perform a go-around as the aircraft passes you by, applying full throttle and targeting the takeoff speed.
If you have mastered the lowpass, perform a touch and go by pulling throttle to idle, and begin rounding out (flare) until the rear wheels touch the runway (reference figure 9-10 in )
Before the front wheel touches, perform a go-around as the aircraft passes you by, applying full throttle and targeting the takeoff speed.

Deliverables

Upload a completed copy of this document (as a PDF) to brightspace by the due date listed in the
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.
See
to add this page to your own doc.
See
to create a PDF of your doc for submission.
Screenshot of updated motor/engine output from .
Inline or attached to Brightspace submission.
Traffic pattern drawing from
Inline or attached to Brightspace submission.
Conversion table from .
Inline or attached to Brightspace submission.
Recording from
Recording from
Recording from

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