Auto-Lean
STC-FAA-PMA
Description
The Auto-Lean is designed to take the thinking out of adjusting your aircraft mixture. The device reads exhaust gas temperature (EGT) or Turbine Inlet Temperature (TIT), just like your EGT gauge or engine analyzer. However, unlike those devices, Auto-Lean moves your mixture control to the desired setting, Peak (PK), Rich of Peak (ROP), Lean of Peak (LOP) or temperature Hold (HD).
Auto-Lean keeps you flying the airplane. Do you ever find yourself staring at your EGT gauge while you slowly adjust the mixture? It can take 5 minutes to properly lean your engine. That is 5 minutes not spent looking for traffic. Auto-Lean does the leaning for you. That gives you more time to avoid traffic and enjoy flying.
The Auto-Lean is STC-PMA approved for the majority of part 23 single engine aircraft. Safety is our primary concern. The Auto-Lean includes numerous safety features to insure that it never shuts off your engine in the case of a failure, as demonstrated to the very demanding FAA!
Simple Operation
- Easy, one or two steps for any mode!!
- Compare to typical manual leaning or engine analyzer operation
- View slide show below for typical flight operation
Function Guide
Specifications
Dimension: 15/16H x 2 1/8W x 3 1/4D
Weight: Module: <3oz, Actuator: <2oz, Thermocouple: <1.5oz, Misc: <0.5oz, Total: <7oz.
Voltage: 14 VDC, <.5A approved, 28 VDC pending
Temperature: Maintains target +-10° F
Time to target: <5 minutes
Actuator stroke: Up to 4"
Certification: FAA STC SA00353BO, FAA-PMA
Auto-Lean Frequently Asked Questions
Q: Can I use an existing EGT probe from my engine monitor?
A: While we recommend use of an independent probe, the STC allows tapping into a secondary EGT or TIT probe. Tapping into the primary probe is not certified.
Q: What happens if I leave it on during take-off?
A: There are multiple safety features. The actuator has limited travel and the software detects large changes in EGT that would cause a flashing yellow FAULT light to illuminate and deactivate the Auto-Lean actuator.
Q: What is the estimated install time?
A: The installation can be done in under 8 hours. The hardest part is gaining access to install and rig the servo. It may require removal of a radio.
Q: How many hours do you have using this device in actual flight?
A: Through the years and in various configurations, we have hundreds of hours of experience with the system. It is also flying on a number of experimental aircraft that have accumulated several hundred hours.
Q: What happens if there is a power failure?
A: If it is momentary, the unit detects a fault and will flash the yellow FAULT light. If it is a long term power failure, simply disconnect the quick disconnect and the aircraft reverts to its stock condition.
Q: Can Auto-Lean be used for the “Target EGT” method in a climb?
A: Yes. The HOLD function can be used to maintain Rich of Peak EGT though the climb, so that the mixture won't be too rich when arriving at cruise altitude.
Q: Do I need multiple probes for Lean of Peak operation?
A: It depends. If your GAMI spread is tight enough, then installing the probe in the last to peak exhaust stack will typically be adequate. In turbo-charged installations, the probe can be installed near the turbine inlet, such that it reads average EGT. In cases where the GAMI spread is broad, it may be necessary to install a probe in each exhaust stack and use a switch to select the last to lean cylinder. For LOP operations, it is assumed that the pilot is monitoring the engine monitor. We have started engineering a multi-cylinder system. We will continue if there is enough interest.
Q: Where and how is the actuator mounted?
A: The actuator is mounted behind the instrument panel. It is mounted to the mixture control housing using standard Adel clamps. Every effort has been made to simplify installation using common hardware and tools. By mounting the actuator behind the panel, it is not subjected to extreme temperatures. The actuator is compact in size to fit easily.
Q: Will the system work on a “quadrant style” mixture control.
A: It has been tested on RV experimental aircraft, but has not been installed in a certified aircraft with a quadrant. We are looking forward to working with a willing participant in the first certified installation.
Q: Are there limitations to where the control module can be installed due to harness length.
A: The harness can be extended a reasonable distance.
Q: How fast can the actuator be disconnected in the even of a failure.
A: After the first few attempts, pilots will be very proficient in connecting and disconnecting the actuator. FAA test pilots spent time evaluating this feature and discovered that the disconnect procedure was nearly instantaneous. Once the quick disconnect is removed, the aircraft reverts to normal operation.
FAA Approved Aircraft, AML-STC-PMA
Beechcraft Corporation
35-33, 35-A33, 35-B33, 35-C33,
35-C33A, E33, E33A, E33C, F33, F33A, F33C, G33, H35, G36, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, 36, A36, A36TC, B36TC
Cessna Aircraft Company
F172, D, F172E, F172, F, F172G, F172H, F172K, F172L, F172M, F172N, F172P, FP172D, F177RG, F182P, F182Q, FR182, FR172E, FR172F, FR172G, FR172H, FR172J, FR172K, LC-40-550FG, LC-42-550FG,
LC41-550FG
Maule Aerospace Technology, Inc
M-4, M-4C, M-4S, M-4T, M-4-180C,
M-4-180S, M-4-180T, M-4-210,
M-4-210C, M-4-210S, M-4-210T,
M-4-220, M-4-220C, M-4-220S,
M-4-220T, M-5-180C, M-5-200,
M-5-210C, M-5-210TC, M-5-220C,
M-5-235C, M-6-235, M-7-235, MX-7-235, MX-7-180, MXT-7-180, MT-7-235,
M-8-235, MX-7-160, MXT-7-160,
MX-7-180A, MXT-7-180A, MX-7-180B, M-7-235B, M-7-235A, M-7-235C,
MX-7-180C, M-7-260, MT-7-260C,
M-7-160C, MX-7-180AC, M-4-180V,
M-9-235
Mooney International Corporation
M20 A, B, C, D, E, F, G, J, K, M, R, S, TN
Piper Aircraft Inc.
PA-32-260, PA-32-300, PA-32S-300, PA-32R-300, PA-32RT-300,
PA-32RT-300T, PA-32-301FT,
PA-32-301XTC, PA-32R-301 (SP),
PA-32R-301T (HP), PA-32R-301T,
PA-32-301, PA-32-301T, PA-28-140,
PA-28-150, PA-28-160, PA-28-180,
PA-28-235, PA-28S-160, PA-28S-180, PA-28R-180, PA-28R-200, PA-28-151, PA-28-161, PA-28-181, PA-28R-201, PA-28R-201T, PA-28-236,
PA-28RT-201, PA-28RT-201T,
PA-28-201T, PA-24, PA-24-250,
PA-24-260, PA-24-400
Textron Aviation Inc.
170, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172R, 172S, 175, 175A, 175B, 175C, P172D, R172E, R172F, R172G, R172H, R172J, R172K, 172RG, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182S, 182T, 182K, 182L, 182M, 182N, 182P, 182Q, 182R, T182, TR182, T182T, 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F, 188, 188A, 188B, A188, A188A, A188B, T188C, 206, P206, P206A, P206B, P206C, P206D, P206E, U206, U206A, 206H, U206B, U206C, U206D, U206E, U206F, U206G, TP206A, TP206B, T206H, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G, 207, 207A, T207, T207A, 210, 210A, 210B, 210C, 210D, 210E, 210F, T210F, 210G, T210G, 210H, T210H, 210J, T210J, 210K, T210K, 210L, T210L, 210M, T210M, 210N, P210N, T210N, 210R, P210R, T210R, 210-5, 210-5A
35-33, 35-A33, 35-B33, 35-C33,
35-C33A, E33, E33A, E33C, F33, F33A, F33C, G33, H35, G36, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, 36, A36, A36TC, B36TC
Cessna Aircraft Company
F172, D, F172E, F172, F, F172G, F172H, F172K, F172L, F172M, F172N, F172P, FP172D, F177RG, F182P, F182Q, FR182, FR172E, FR172F, FR172G, FR172H, FR172J, FR172K, LC-40-550FG, LC-42-550FG,
LC41-550FG
Maule Aerospace Technology, Inc
M-4, M-4C, M-4S, M-4T, M-4-180C,
M-4-180S, M-4-180T, M-4-210,
M-4-210C, M-4-210S, M-4-210T,
M-4-220, M-4-220C, M-4-220S,
M-4-220T, M-5-180C, M-5-200,
M-5-210C, M-5-210TC, M-5-220C,
M-5-235C, M-6-235, M-7-235, MX-7-235, MX-7-180, MXT-7-180, MT-7-235,
M-8-235, MX-7-160, MXT-7-160,
MX-7-180A, MXT-7-180A, MX-7-180B, M-7-235B, M-7-235A, M-7-235C,
MX-7-180C, M-7-260, MT-7-260C,
M-7-160C, MX-7-180AC, M-4-180V,
M-9-235
Mooney International Corporation
M20 A, B, C, D, E, F, G, J, K, M, R, S, TN
Piper Aircraft Inc.
PA-32-260, PA-32-300, PA-32S-300, PA-32R-300, PA-32RT-300,
PA-32RT-300T, PA-32-301FT,
PA-32-301XTC, PA-32R-301 (SP),
PA-32R-301T (HP), PA-32R-301T,
PA-32-301, PA-32-301T, PA-28-140,
PA-28-150, PA-28-160, PA-28-180,
PA-28-235, PA-28S-160, PA-28S-180, PA-28R-180, PA-28R-200, PA-28-151, PA-28-161, PA-28-181, PA-28R-201, PA-28R-201T, PA-28-236,
PA-28RT-201, PA-28RT-201T,
PA-28-201T, PA-24, PA-24-250,
PA-24-260, PA-24-400
Textron Aviation Inc.
170, 170A, 170B, 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L, 172M, 172N, 172P, 172Q, 172R, 172S, 175, 175A, 175B, 175C, P172D, R172E, R172F, R172G, R172H, R172J, R172K, 172RG, 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 180J, 180K, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182S, 182T, 182K, 182L, 182M, 182N, 182P, 182Q, 182R, T182, TR182, T182T, 185, 185A, 185B, 185C, 185D, 185E, A185E, A185F, 188, 188A, 188B, A188, A188A, A188B, T188C, 206, P206, P206A, P206B, P206C, P206D, P206E, U206, U206A, 206H, U206B, U206C, U206D, U206E, U206F, U206G, TP206A, TP206B, T206H, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G, 207, 207A, T207, T207A, 210, 210A, 210B, 210C, 210D, 210E, 210F, T210F, 210G, T210G, 210H, T210H, 210J, T210J, 210K, T210K, 210L, T210L, 210M, T210M, 210N, P210N, T210N, 210R, P210R, T210R, 210-5, 210-5A
Auto-Heat
and Cool!
Compact computer control for cabin heat and vent!
Set the temperature and forget it!
Your passengers will love the intuitive control!
Experimental? Save weight and complexity, ditch the cables!
and Cool!
Compact computer control for cabin heat and vent!
Set the temperature and forget it!
Your passengers will love the intuitive control!
Experimental? Save weight and complexity, ditch the cables!
About
Auto-Heat is a thermostat for your airplane. Auto-Heat manages the cabin temperature just like your modern automobile or house thermostat. Set the temperature and forget it for the rest of the flight. It opens and closes your heat valve, as required to manage the heat. Auto-Heat even has an optional ability to regulate your cool air inlet when the temperatures demand less heat and more cool.
Auto-Heat is FAA-PMA approved as a minor alteration to most part 23 single engine airplanes.
Auto-Heat includes the compact, Auto-Heat module, an ambient air thermocouple, and a compact linear actuator to adapt to your air valve. Simple installation. Call us for more information.
Specifications
Dimension: 15/16H x 2 1/8W x 3 1/4D
Weight: Module: <3oz, Actuator: <2oz, Thermocouple: <0.5oz, Misc: <0.5oz, Total: <6oz.
Voltage: 14 VDC, <.5A approved
Temperature: Maintains target ±2° F
Actuator stroke: 2"
Certification: FAA-PMA
Auto-Heat is a thermostat for your airplane. Auto-Heat manages the cabin temperature just like your modern automobile or house thermostat. Set the temperature and forget it for the rest of the flight. It opens and closes your heat valve, as required to manage the heat. Auto-Heat even has an optional ability to regulate your cool air inlet when the temperatures demand less heat and more cool.
Auto-Heat is FAA-PMA approved as a minor alteration to most part 23 single engine airplanes.
Auto-Heat includes the compact, Auto-Heat module, an ambient air thermocouple, and a compact linear actuator to adapt to your air valve. Simple installation. Call us for more information.
Specifications
Dimension: 15/16H x 2 1/8W x 3 1/4D
Weight: Module: <3oz, Actuator: <2oz, Thermocouple: <0.5oz, Misc: <0.5oz, Total: <6oz.
Voltage: 14 VDC, <.5A approved
Temperature: Maintains target ±2° F
Actuator stroke: 2"
Certification: FAA-PMA