New Aztec Nacelles In final Approval Process

New Aztec Nacelles- In final approval process. This variation covers the hundreds of PA23-250 Aztec Models which are equipped with the factory-installed  or aftermarket Air-Research Turbo-Charging Systems.  Nacelle kits will be available for all Aztec models.  Call or email John Talmage at Montana Diamond Aire for more info. 

Montana Diamond Aire New Aztec Nacelles


Montana Diamond Aire New Aztec Nacelles

Our New Website

Our Updated Website

Our Updated Website


We have given our website a new look!  The updated site is now viewable in all browsers.

Space Shuttle Lauched Delayed For The Fifth Time!

The space shuttle Endeavor’s launch was scrapped again today due to thunderstorms in the Kennedy Space Center area.   We have been in Florida for the past few days and this was our second attempt to view the launch.  The only video that we were able to capture was the Endeavor sitting on the launch pad.  Today’s mission was aborted 9 minutes before lift-off.

We have made use of our time in Florida by visiting Disneyworld and making new friends in the Clearwater area.  Still undecided whether we will make another attempt to view Endeavor’s launch on Wednesday evening.

Check out these photos of our trip!

In Florida Gator mating season is in full swing so these guys will show up just about anywhere!

In Florida Gator mating season is in full swing so these guys will show up just about anywhere!Mickey and Fred

Complete Piper Aztec Overhaul


Piper Aztec Complete Overhaul and Restoration Before

Piper Aztec Complete Overhaul and Restoration Before


The Piper Aztec pictured above is currently undergoing a complete restoration and overhaul.  Upgrades will include a new interior, custom paint job, new engines and nacelles, and instrument panel.  We will be posting the final “after” photos of this project once finished.

At Montana Diamond Aire we not only perform complete Piper Apache to Geronimo conversions but all types of modifications and upgrades for Piper Aztecs and Apaches.  Visit our website for a listing of our fully STC’d modifications or email .

Please note the performance chart below for the Piper Aztec if you are considering a twin-piston aircraft purchase.


Piper Aztec

Take-off Distance, 50-foot obsacle (Ft)


Landing Distance, 50-foot obsacle (Ft)


Gross Weight


Useful Load


Max Payload (Full Fuel)


Fuel Capacity


Range @ 65% Power


Cruise Speed @ 65% Power (Kts)


Rate of Climb (Sea Level)


Single Engine Rate of Climb (Sea Level)


Service Ceiling


Single Engine Service Cieling



Lycoming 250 Hp IO-540-C4B5

Total Fuel Burn/Hr


Piper Geronimo Conversion Safety and Stability

Like This Classic Car, a Meticulously Maintained Piper Geronimo Conversion By Montana Diamond Aire Will Provide Safety and Stability For Years to Come!

Like This Classic Car, a Meticulously Maintained Piper Geronimo Conversion By Montana Diamond Aire Will Provide Safety and Stability For Years to Come!


When we overhaul an Apache airframe, we completely strip the aircraft inside and out. All of the tail surfaces are removed including the vertical and horizontal stabilizers. We have STC SA2793SW which is a rudder bracket reinforcement, SA4007SW which is a structural improvement parts kit for the flaps and elevators. The whole aircraft is powerwashed inside and out, all surfaces are inspected. The landing gear gets updated (much-stronger) drag links, the tail system attach areas get a doubler added and all new attachment hardware before the tail components are reinstalled. All hoses are replaced, control surface hinges/bearings…all hydraulic components overhauled, all moving parts in the whole airframe get re-bushed or bearings replaced as applicable….the list gets pretty long. In short, we are very thorough with our airframe overhauls.

Montana Diamond Aire has several Piper Apache airframes available for made-to-order Piper Geronimo Conversions.  Order today and we can have you in the air by early 2010!

Please email for more info.  Please visit our website as well

S’no Stopping Us at Montana Diamond Aire!


Christmas Eve at Montana Diamond Aire

Christmas Eve at Montana Diamond Aire


Looking for Piper Apache Vortex Generators,  Fiber-optic back-lit Geronimo instrument panel, 180 Hp Lycoming Engine, Piper conversion enhancements, Piper Instrument Panels, Engine Instrumentation, Piper Apache Enhancement Kits, Piper Apache To Geronimo Conversions, Prop Conversion-Tip Props, Piper Speed Mods, One Piece Speed Slope Windshield, Fiberglass Engine Nose Bowl. Fiberglass Nacelles, 2-1/4″ Dual-Needle STC’D Backlit Gauges, 3-1/8″ Dual Electric STC’D Tachometer?
We got them all at Montana Diamond Aire!

Website Updates

Montana Diamond Aire has expanded to include a page listing newly found technical issues with certain Piper Aircraft.  John Talmage is closely documenting problems he is encountering during modifications and maintenance of the Piper Aztec, Piper Apache and Piper Geronimo aircraft.

This page is still under construction but the updating of the technical issues and possible solutions will be an ongoing project.

Flathead Valley Kalispell Montana

Flathead Valley Kalispell Montana

Piper Advertisement Circa 1954

Piper Advertisement Circa 1954

Piper Advertisement Circa 1954

Experimental Aircraft Crashes

Experimental Aircraft Crashes Into Hangar Near Homestead Florida Today

Piper Apache Enhancement Kits

Montana Diamond Aire has the following Piper Apache enhancement kits available:

Full Main Wheel Gear Door Kit 

Main wheel full clamshell door kit includes complete streamlined door housing/fairings for both sides, and all necessary gear door actuator components and hardware. Adds about 5 Mph to cruise, and very noticeable increase in climb performance.


The nose is 16 inches longer than standard with a baggage compartment.

Wing Tips

Improves lateral stability, stall characteristics and appearance. Increases speed approximately four mph, decreases take-off distance and lowers the stall speed. The wing span is reduced by 22 inches.


Same aerodynamic advantages as the regular wing tips plus an increase of 48 gallons of fuel capacity.


Reduces single engine control speed and yaw tendency in turbulence. Greatly improves single engine performance.


Greatly improves the appearance and single engine performance of the aircraft. Includes fiberglass horizontal stabilizer fairings (both sides) for a slightly increased airspeed.


Increases speed & directional control, and is more streamlined in appearance.


Flap gap seals lower the stalling speed and increases the rate of climb, cruise and top speeds, especially when heavy or at high altitudes.

One Piece speed slope windshield kit

Quarter-inch thick, distortion free plexiglass. Much more streamlined than the standard one piece windshield. Increases airspeed up to four mph. Tremendous improvement in appearance and style. Includes new fiberglass cowler and hardware. Available in green tint or solar gray for additional $60.


Improves airflow for reduced drag, a slight increase in airspeed and an enhanced appearance.


Replace the original with impact resistant fiberglass. Eliminates problems of metal fatigue, cracking, splitting and repairs.


Greatly improved sealing for your protection. Considerably lower cabin noise and lasts longer than other door seals. Available with either electric or manual pump. Call with specific application. This enhancement also approved for Aztecs.


Available in several different options. Call for details


Approved for Aztec, Apache & Geronimo aircraft, this one-piece design eliminates cockpit display clutter and is shock-mounted to isolate full panel. Several panel styles include back-lighting or post-lighting, engine instrumentation and radio configuration options. Dual centerstack design with option for copilot instruments. Kit price consists of STC paperwork, eight Lord mounts and complete installation plans only. Swing-down buss/ switch panel optional. Custom cut panels and pre-fabricated PMA bracket sets available. This STC affords the owner/installer great latitude in customizing panel to fit individual avionics & instrumentation needs without the need for a field approval. Installation available, call for details. We also offer a new fiberglass glareshield in two styles for $389. Note: PMA approved, 2-1/4 inch round, dual backlit engine instrumentation/fuel gauges available soon!

Rear Baggage Compartment Kit

Aluminum construction, measures 33 inches deep, 36 inches high. Extends cabin & baggage area to create a more modern interior appearance.


Aztec Style available in several different options. Improves passenger comfort, styling and appearance. Call for details.


Includes upgrading system to dual Cleveland brake calipers. Holds aircraft during application of full power engine run-up and shortens landing roll. Especially useful with gross weight increase STC.


Reduces noise level to a point of normal conversation. Improves passenger comfort and is an effective barrier against heat transfer. Can be installed with or without the purchase of a new interior.

For prices, photos and more, please visit or email John Talmage.