Here is an array of motor mount sizes including interchangable designs that allow the use of several motor diameters in the same rocket.


PML produces a unique interchangable motor mount adapter called the Kwik-Switch 2000 that uses a threaded coupler that is very durable and reliable. Motors can be friction fit into the adapter, prepped, then screwed in the rocket. The KS2000 system uses our 54, 38, and 29mm phenolic airframe tubing, and custom-cast urethane parts for the screw-together parts.

Click here for the Kwik-Switch 2000 assembly instructions in PDF format.

   
The Kwik-Switch 2000, whether as a stand-alone part for scratchbuilds or used in kits, comes with the 54mm main motor tube, and 38mm and 29mm adapters included.

The standard Kwik-Switch system fits all 29mm reload casings, the 38mm 240, 380, 480, 600, and 720 casings, and the 54mm 852 and 1280 casings. The Extended Kwik-Switch will fit all the above and adds the 54mm 1706 casing. The J570 casing is not recommended for the Extended Kwik-Switch.

See our FAQ (link below) for more information about use of a J570 casing with Kwik-Switch systems. (Requires ADPTR-54/38HD below; Extended KS not recommended).

 

See our Motor Retainer Page for our H.A.M.R. (Highly Adaptable Motor Retainer) to go with your motor mount.

There are HAMR Motor Mount Adapters available for 54/38, 54/29 and 38/29 that are specifically designed for the HAMR system!

 

PML also produces friction fit adapters with a built-in thrust ring to prevent the adapter from being pushed through during the thrust phase.

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Kwik-Switch, 54/38/29 Kit

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Kwik Switch 2000 Motor Mounts:

The Kwik Switch. The first and only interchangeable motor mount system in the industry just got better! Once the 54mm mother tube is installed in your rocket, you can change up to 38mm or 29mm by just screwing in the adapters. Approximately 13.5" usable length. Assembles in just minutes. (This system must be incorporated during initial assembly.)

The complete Kwik Switch 2000 kit includes:
  • 1) 2.1" x 14.5" Mother tube (54mm)
  • 1) 1.5" x 14.5" Adapter tube (38mm)
  • 1) 1.1" x 14.5" Adapter tube (29mm)
  • All necessary rings & locking components
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$29.99



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Kwik-Switch, 54mm Mother Tube

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Additional 54mm Mother Tube; includes threaded plastic portion. 3.4 oz.



$13.99



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Kwik-Switch, 38mm Adapter

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Additional 38mm Adapter; includes threaded plastic portion and centering ring. 2.3 oz.



$12.99



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Kwik-Switch, 29mm Adapter

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Additional 29mm Adapter; includes threaded plastic portion and centering ring. 2.2 oz.



$12.79



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Kwik-Switch, Extended, 54/38/29 Kit

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Extended KwikSwitch 2000 Motor Mounts
Just like the standard Kwik Switch 2000 described above, except the tubes are 17" long (will accept the longer 54/1706 casing). Approximately 17.5" usable length. (Extended KS not recommended for J570; use ADPTR-54/38HD for J570). The complete Extended Kwik Switch 2000 kit includes:

  • 1) 2.1" x 17.9" Mother Tube (54mm)
  • 1) 1.5" x 17.9" Adapter Tube (38mm)
  • 1) 1.1" x 17.9" Adapter tube (29mm)
  • All necessary rings & locking components
`


$33.99



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Kwik-Switch, Extended, 54mm Mother Tube

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Additional extended 54mm Mother Tube 5.0 oz



$14.49



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Kwik-Switch, Extended, 38mm Adapter

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Additional extended 38mm Adapter 3.5 oz



$13.49



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Kwik-Switch, Extended, 29mm Adapter

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Additional extended 29mm Adapter 2.7 oz



$12.99



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Kwik-Switch, 98/75/54 Kit

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98/75/54 Kwik-Switch Motor Mounts:

With the advent of 98mm motors, many people are building large rockets with 98mm motor mount tubes. Some of these rockets can be successfully flown with 75mm and 54mm motors as well. We have developed a giant, heavy-duty version of our original locking-tab style Kwik-Switch motor mount to allow you to easily and safely change from one motor size to another in a matter of seconds. This mount is available with 98/75/54mm adapters, or with just 98/54mm adapters. Each adapter is also available individually, as is the 98mm Mother Tube system (so you can build it into your rocket and add adapters later).

The 98mm Kwik Switch kit includes:
  • 1) 36" long 98mm tube (PT-3.9)
  • 1) 36" long 75mm tube (PT-3.0)
  • 1) 36" long 54mm tube (PT-2.1)
  • All necessary locking & centering rings
  • All necessary locking tabs (already installed in 98mm Mother Tube)
  • 42.2 oz.



$92.99



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Kwik-Switch, 98/75

Complete system less 54mm Adapter.28.4 oz.


$68.99



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Kwik-Switch, 98/54

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Complete system less 75mm Adapter.28.4 oz.


$59.99



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Kwik-Switch, 98 Mother Tube

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98mm Mother Tube system only16.8 oz.


$30.99



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Kwik-Switch, 98/75 Adapter

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75mm Adapter Only13.8 oz.


$38.99



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Kwik-Switch, 54 Adapter

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54mm Adapter Only11.8 oz.


$28.99



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Kwik-Switch, 75/54 Kit

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75/54 Kwik-Switch Motor Mounts:

Similar to our Giant KS 98mm system above, we also offer a 75/54mm original locking-tab style Kwik-Switch motor mount for the popular 75mm motors. This mount comes with the 75mm mother tube and 54mm adapter. The 75/54mm adapter is available individually, as is the 75mm Mother Tube system (so you can build it into your rocket and buy the 54mm adapter later).

The 75mm Kwik Switch kit includes:
  • 1) 36" long 75mm tube (PT-3.0)
  • 1) 36" long 54mm tube (PT-2.1)
  • All necessary locking & centering rings
  • All necessary locking tabs (already installed in 75mm Mother Tube)
  • 22.4 oz.


$53.99



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Kwik-Switch, 75 Mother Tube

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75mm Mother Tube system only. 36" long.12.3 oz.


$28.99



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Kwik-Switch, 75/54 Adapter

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75/54mm Adapter Only for KS75/54 system. 36" long.10.1 oz.


$27.99



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Motor Mount Tube, 1.1 (29mm x 18

1.145" ID Phenolic Airframe Tubing .062 Wall18" Length2.3 oz.


$6.99



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Motor Mount Tube, 1.5 (38mm x 18

1.525" ID Phenolic Airframe Tubing .062 Wall18" Length3.1 oz.


$7.49



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Motor Mount Tube, 2.1 (54mm x 18

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2.152" ID Phenolic Airframe Tubing .062 Wall18" Length4.4 oz.


$8.99



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