Central Hobbies

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Central Hobbies
1401 Central Avenue
Billings, MT 59102

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LANDING GEAR : RETRACTABLE


  • Page 1 of 2  |  20 Total Products





Part#: CHS041L
LANDING GEAR RETRACTABLE MECHANICAL
Description:


Our Price: $19.99
Qty Desired:   Add to Cart
 



Part#: CHMTS3
STRUT TITANIUM 3/16
Description:

One pair: one right side and one left side.

When Central Hobbies first began offering titanium struts, a lot of pattern pilots were curious as to why they might want to use them, and whether or not the extra cost is justified.  And we get still the same question from pilots who are looking for ways to improve performance and stability.

There are times when the 5/32" steel struts are not enough. As pattern planes have evolved, several factors have contributed to the need for more substantial struts. Those factors include:

  • Higher wing locations

  • Higher weights of the newer 2-meter aircraft

  • More powerful engines that turn larger diameter props (16-17" diameter and larger vs. the old 12" - 13" standards)

As a rule of thumb, titanium has only three fifths the weight of the steel used in steel struts.  So if your steel struts weigh in at 60 grams a pair (roughly 2.12 ounces), you can cut 24 grams off the gross weight of your plane by simply switching to titanium struts of the same diameter and length.  Yet, while saving weight, you also add a lot of durability and strength to the landing gear.

Obviously the higher weights put more load on the struts. But even more significant are wing location and prop diameter: both are factors that require LONGER struts.  As you extend the standard 5/32" wire struts beyond a length of 7-8 inches, they become too spindly and bend too easily.

Enter the titanium strut. Made from Titanium alloy, at full length the struts are lighter than the much shorter standard struts, and offer better rigidity. They also tend to bend further WITHOUT taking a permanent "set" requiring re-bending.  For the larger planes and props, these struts offer the support and clearance needed with lower weight than the shorter standard struts. 

You may also want to consider building your aircraft to accept the larger -- 2-3/4" to 3" -- wheels to further enhance the ground handling of your aircraft and allow slightly shorter struts.

Are there any negative aspects to the titanium struts?

In a word, yes.

Titanium is expensive material and is also more demanding to work and machine. These factors make titanium struts more expensive than music wire.  Also, if there are defects in a strut, or with a very hard impact, the struts may still break.  We've had a total of three strut failures reported to us in the entire time we've been selling titanium struts (to hundreds of pilots all around the world).

NOTE: Titanium is Not bendable without special equipment and process. Attempting to bend these struts Will most like break them and is Not covered by any warrenty. Use the appropriate axles for the size strut.


Our Price: $19.95
Qty Desired:     Out of Stock
 



Part#: CHMTS5
STRUT TITANIUM 5/32
Description:

One pair: one right side and one left side.

When Central Hobbies first began offering titanium struts, a lot of pattern pilots were curious as to why they might want to use them, and whether or not the extra cost is justified.  And we get still the same question from pilots who are looking for ways to improve performance and stability.

There are times when the 5/32" steel struts are not enough. As pattern planes have evolved, several factors have contributed to the need for more substantial struts. Those factors include:

  • Higher wing locations

  • Higher weights of the newer 2-meter aircraft

  • More powerful engines that turn larger diameter props (16-17" diameter and larger vs. the old 12" - 13" standards)

As a rule of thumb, titanium has only three fifths the weight of the steel used in steel struts.  So if your steel struts weigh in at 60 grams a pair (roughly 2.12 ounces), you can cut 24 grams off the gross weight of your plane by simply switching to titanium struts of the same diameter and length.  Yet, while saving weight, you also add a lot of durability and strength to the landing gear.

Obviously the higher weights put more load on the struts. But even more significant are wing location and prop diameter: both are factors that require LONGER struts.  As you extend the standard 5/32" wire struts beyond a length of 7-8 inches, they become too spindly and bend too easily.

Enter the titanium strut. Made from Titanium alloy, at full length the struts are lighter than the much shorter standard struts, and offer better rigidity. They also tend to bend further WITHOUT taking a permanent "set" requiring re-bending.  For the larger planes and props, these struts offer the support and clearance needed with lower weight than the shorter standard struts. 

You may also want to consider building your aircraft to accept the larger -- 2-3/4" to 3" -- wheels to further enhance the ground handling of your aircraft and allow slightly shorter struts.

Are there any negative aspects to the titanium struts?

In a word, yes.

Titanium is expensive material and is also more demanding to work and machine. These factors make titanium struts more expensive than music wire.  Also, if there are defects in a strut, or with a very hard impact, the struts may still break.  We've had a total of three strut failures reported to us in the entire time we've been selling titanium struts (to hundreds of pilots all around the world).

 

NOTE: Titanium is Not bendable without special equipment and process. Attempting to bend these struts Will most like break them and is Not covered by any warrenty. Use the appropriate axles for the size strut.


Our Price: $19.95
Qty Desired:   Add to Cart
 



Part#: ROB157VRX
AIR CONTROL KIT DELUXE LARGE
Description:

This is a variable rate air control kit from Robart for any pneumatic retract  system.                                       

More Info
Our Price: $109.95
Qty Desired:   Add to Cart
 



Part#: ROB164G
HAND AIR PUMP WITH GAUGE 100PSI
Description:

This is a Hand Pump for Charging Pneumatic Retract Systems with Air.

FEATURES:
Has a High Stroke-To-Bore Ratio so High Pressures with Minimum Effort
Rated at Over 100 psi
Gauge on the Pump w/Ball Check Valve so Tank Pressure can be Read
Bright Nickel Finish

INCLUDES:
One 100 psi Hand Pump w/Gauge and 14" Red Tubing

COMMENTS:
Robart makes the 164C Air Pump Mounting Clips (ROBQ2362) for conveniently mounting the hand pump to the outside of a field box.


Our Price: $44.95
Qty Desired:   Add to Cart
 



Part#: ROB168
FILL VALVE FILL FITTING
Description:

This is a Fill Valve and a Fill Valve Fitting from Robart.   

FEATURES:
Lightweight Aluminum
Works with Most Retract Systems
Fills with Air from Both Pumps and Compressors                       
                                                                               
INCLUDES:
One Fill Valve
One Fill Valve Fitting       


Our Price: $24.45
Qty Desired:   Add to Cart
 



Part#: ROB169
PRESSURE TUBING 10 FEET (5FT RED AND 5FT PURPLE)
Description:

This is Tubing used with Pneumatic Control Systems or Retracts.

FEATURES:
Durable, High-Pressure Tubing for Pneumatic-Control Systems or  Retracts.

INCLUDES:
One5 ft Pressure Red (pink) Tubing
One 5 ft Pressure Purple Tubing

SPECS: 
Rated at Over 150 psi 
Outside Diameter: 1/8 inch
Inside Diameter: 1/16inch    


Our Price: $9.45
Qty Desired:   Add to Cart
 



Part#: ROB169B
AIR LINE TUBING BLACK 10 FEET
Description:

This is Tubing used with Pneumatic Control Systems or Retracts.

FEATURES:
Durable, High-Pressure Tubing for Pneumatic-Control Systems or Retracts.

INCLUDES:
One 10' Pressure Black Tubing

SPECS: 
Rated at Over 150 psi
Outside Diameter: 1/8"
Inside Diameter: 1/16"


Our Price: $8.95
Qty Desired:   Add to Cart
 



Part#: ROB170
AIR LINE RETAINER FITTINGS
Description:

This is a package of 6 Air Line Retainer Fittings from Robart. 

FEATURES:
Knurled for tool free hand tightening. 
Aluminum construction.
Threaded through entire body. 

SPECS: 
Height: 6.0mm (.238")
Outside diameter: 6.4mm (.252") 
Inside diameter: 4.0mm (.159")

COMMENTS:
Air line fitting retainers connect your air tubing to your fittings. 
The tubing goes to the fitting, and the retainter holds it in place by threading over the tubing and the fitting. 


Our Price: $8.95
Qty Desired:   Add to Cart
 



Part#: ROB173
ROBART ON BOARD PRESSURE GAUGE FOR RETRACT SYSTEM
Description:

This is an On-Board Pressure Gauge that Easily Monitors the Air Pressure of  Your Robart Retracts.

FEATURES: Works with any air system                                            
          Mounts to side of fuselage or as an instrument in the cockpit        
          Reads 20-140 psi, in 20 psi increments                               
          Metal Construction                                                   
                                                                               
INCLUDES: One On-Board Pressure Gauge                                          
          One T-Fitting                                                        
                                                                               
REQUIRES: Any Pneumatic Retract System.                                        
                                                                               
SPECS:    Weight: 0.2oz                                                        
          Length: 1-5/8"                                                       
          Diameter: 1/2"      


Our Price: $22.45
Qty Desired:   Add to Cart
 



Part#: ROB188VR
AIR CONTROL KIT STANDARD
Description:

This is a Variable Rate Air Control Kit from Robart for Any Pnuematic Retract System.                                        

More Info
Our Price: $59.45
Qty Desired:   Add to Cart
 



Part#: ROB188VRX
AIR CONTROL KIT STANDARD DELUXE SMALL
Description:

The Deluxe Air Control Kit is the "plumbing" for Robarts retracts used in .60-.80 sized aircraft. This air kit can be used for two gear or three gear retracts.     

More Info
Our Price: $73.99
Qty Desired:     Out of Stock
 
  • Page 1 of 2  |  20 Total Products