E-FLITE UMX Pitts S-1S User Manual (English)

Questions and Answers:

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brianmcmillanJul 28, 2025
Why is my E-FLITE Aircraft flight time so short?
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  Steve KennedyJul 28, 2025
  If your E-FLITE Aircraft experiences reduced flight time or seems underpowered, it could be due to several reasons. First, ensure the flight battery is fully charged. If the battery is damaged, replace it, following all battery instructions. Also, confirm the propeller is installed correctly with the numbers facing forward. Cold flight conditions can also affect battery performance, so warm the battery before use. Finally, the battery capacity might be insufficient for the flight conditions; consider replacing it with a larger capacity battery.
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Dr. Rebecca Reed MDJul 31, 2025
What to do if my E-FLITE Aircraft throttle is not responding?
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  Maria Zimmerman MDAug 1, 2025
  If your E-FLITE Aircraft responds to other controls but not to the throttle, there are a few potential causes. Ensure that the throttle stick and trim are at their lowest settings by resetting the controls. Check if the throttle channel is reversed and, if so, reverse it on the transmitter. Finally, open the fuselage to verify that the motor is properly connected to the receiver.
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Kevin HammondAug 5, 2025
How to reduce propeller noise on E-FLITE Aircraft?
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  Eric WillisAug 5, 2025
  If you notice extra propeller noise or vibration in your E-FLITE Aircraft, inspect the propeller, spinner, and motor for any damage and replace any damaged parts. Ensure the prop screw is tightened. If the propeller is unbalanced, remove it and balance it, or replace it with a balanced propeller.
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Kristi CunninghamAug 9, 2025
Why do the controls oscillate in my E-FLITE Aircraft?
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  Crystal TurnerAug 9, 2025
  If the controls of your E-FLITE Aircraft oscillate in flight, causing rapid jumps or movements, it might be due to an unbalanced propeller causing excessive vibration. Remove the propeller and rebalance it, or replace it if it is damaged. Another cause could be a loose prop screw, so ensure that the prop screw is tightened.
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Andrew DavidAug 13, 2025
How to center control surfaces on E-FLITE Aircraft?
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  Scott CraigAug 13, 2025
  If the control surfaces of your E-FLITE Aircraft are not at a neutral position when the transmitter controls are neutral, it could be due to a couple of reasons. The control surfaces may not have been mechanically centered at the factory; if this is the case, center them mechanically by adjusting the U-bends on the control linkages. Alternatively, if the aircraft was moved after the flight battery was connected but before the sensors initialized, disconnect and reconnect the flight battery while keeping the aircraft still for 5 seconds.
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Christopher McconnellAug 18, 2025
Why does my E-FLITE Aircraft fly inconsistently?
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  jgrimesAug 18, 2025
  If your E-FLITE Aircraft flies inconsistently from flight to flight, there could be a couple of reasons. Ensure the aircraft remains immobile for 5 seconds after plugging in the battery. Also, if the trims are moved too far from the neutral position, neutralize the trims and mechanically adjust the linkages to center the control surfaces.

E-FLITE UMX Pitts S-1S Specifications

General

Control Surfaces	Ailerons, Elevator, Rudder
Experience Level	Intermediate
Approximate Assembly Time	Less than 1 Hour
Construction	Foam
Completion Level	Bind-N-Fly (BNF)
Receiver	Spektrum DSMX Receiver/ESC/Servo Unit (installed)
Servos	2 x Linear Servos
Approximate Flight Time	5-8 minutes