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Losmandy Titan Mount Head with Tripod, 21 lb. Counterweight (63,202 bytes)

LOSMANDY HGM TITAN GERMAN EQUATORIAL MOUNT

Introduced October 2002

Right: Losmandy Titan Mount Head with Tripod, 21 lb. Counterweight (63,202 bytes).
Click on the image to see enlarged view (202,044 bytes).

Since the early 1990's the Losmandy Model G-11 German Equatorial mount has come to represent the best value in its class; a particularly attractive choice for those who require a high degree of tracking precision and reliability with payloads up to 6 inch refractors, or 11 to 12 inch apertuure Schmidt Cassegrain telescopes. There are those who consider larger telescopes to be "portable", so for those people who seek a platform engineered for telescopes such as the Celestron C-14, and Astro-Physics 10" Mak, Losmandy developed the HGM Titan. Even the relatively smaller telescopes are more and more requiring higher capacity mounts as the weight of CCD cameras, Flip Mirror, Color Filter Wheels, etc. grows too.

At first glance the resemblence of the Titan to the larger HGM-200 mount is obvious The Titan appears to be a scaled down HGM-200. But this is a mount that was engineered from the ground up to take advantage of the dramatic developments in mount drive corrector and computer control technology. In fact this mount is available with only the proven Losmandy Gemini "Go To" computer control system. As has been the case with most Losmandy mounts, it is a valuable asset that the Titan too is a mount among the few high performance platforms whose components are modular, symmetrical, and fairly simple to service or replace in the field. Our experience is that there is rarely a need to return a head to the USA for service, even more so since Company Seven technicians put in about four to five man hours checking through and fine tuning each new Losmandy mount which we receive. You are not likely to encounter any defect that would require a return of the head sold by Company Seven for service.

Losmandy Titan Mount Head (59,558 bytes)Left: Losmandy Titan Mount Head (59,558 bytes).
Click on the image to see enlarged view (131,837 bytes).

Payload ratings of telescope mounts vary with design and material used, and in the manner with which the proud manufacturer judges their product, and so this alone is not a reliable predictor of performance. A telescope mount has several factors that will affect suitability including: static load, length and torque, desired tracking accuracy, tripod or pier resonances, etc. What is most important to the user of the product is how rigidly the mount holds the payload, how smoothly it tracks (amplitude and smoothness of the periodic error of a gear), and how it overcomes the moment imparted by the load. This will vary with weight of the load, and the physical length of the load.

The weight put onto the mount will vary depending how the instrument is to be used too. For example one telescope used for visual work only may be as much as fifty percent lighter in weight than another employed for imaging (possibly with guide scopes, cameras, etc.). The potential loading on the mount may also vary with local winds; even a mild wind accross the "sail" area of a large reflecting telescope can dramatically increase the effective load imparted to the mount. So, a small mount operating from within a shelter (such as a dome) with a short and narrow telescope might perform as well or better than a larger mount outside a sheltered environment. Indeed, some people elect to buy a smaller mount and then put the balance saved by not buying a larger mount into a shelter.

Features of the Model HGM Titan Mount

  • All machined mount made from stainless steel and aluminum bar stock
  • Rated payload capacity of 100 lbs.
  • Right Ascension and Declination Worm Gears are each 6.750" Diameter, 270 tooth, of 7075 Aluminum
  • Heat Treated and Precision Ground Stainless Steel Worm Gears,
    each dual supported by Ball Bearings assuring +/-5 Arc Second Tracking or better
  • Single piece worm housing construction, double ended, ball bearing supported with adjustable preload
  • Fully enclosed R.A. and DEC. worm and worm gear.
  • Low temperature operation down to -55 degrees F (-48 C)
  • Removable counterweight shaft, 1.25" diameter
  • Shafts are 1.968" diameter stainless steel tubing, 0.250" wall thickness.æ
  • 5.062" diameter needle thrust bearings.
  • 3.500" diameter sealed ball bearings.
  • 3.100" diameter sealed ball bearings for worm gear.
  • Variable slip clutch, 6.0" diameter both axes, one knob design.
  • Altitude and azimuth fine positioning adjustments for quickly and accurately zeroing in on the Celestial pole in the field
    • Fully locking, unique tangent arm design altitude adjustment, 12 to 70 degrees, large knob for easy alignment.
    • Single knob azimuth control, bi-directional +/- 10 degrees
  • X and Y axis bubble level
  • Laser engraved latitude scale in 2 degree increments
  • Split dovetail saddle plate design so dovetail plate drops in and locks
    allowing quick interchange of poayload and reducing the need for DEC. weights.
  • Losmandy Gemini "Go To" Compter Control system
  • Two 21 lb. counterweights are provided
  • Available with our without Semi-Pier Tripod of machined aluminum with removable legs for easy transport

Popular Options Include

  • 7 lb. (3.2 kg) counterweights
  • 11 lb. (5 kg) counterweights
  • Off axis Pole Finder telescope for use in Northern and Southern hemispheres
  • Tripod of Semi-Pier design, removable adjustable height legs.

SPECIFICATIONS OF TITAN MOUNT SYSTEM
R.A. Gear Wheel: 6.7500", 270 tooth 7075 T35 aluminum
DEC. Gear Wheel: 6.7500", 270 tooth 7075 T35 aluminum
DEC. and R.A. Worm gear: 440C Stainless (54 Rockwell hardness)
Worm gear support: Dual supported ball bearings
Preload: Adjustable
R.A. Axis Needle Thrust Bearings: 5.062" Dia. needle thrust, 3.500 ball
DEC. Axis Needle Thrust Bearings: 5.062" Dia. needle thrust, 3.500 ball
DEC. and R.A. Clutches: 6.0" Slip clutch, variable friction, one knob ea. axis
Latitude Tangent Arm range: 12 to 70 degrees
Azimuth adjustment range: + or - 10 degrees
Dovetail Saddle Plate: 1.00 x 6.00 x 8.00" Split Saddle
Dovetail Male Plates: D Series
Mass of Equatorial Mount Head Approximately 84 lbs.
Load Capacity: Approximately 150 lbs.

SPECIFICATIONS OF TITAN MOUNT TRIPOD
Construction All machined aluminum, black anodized.
Semi-Pier Tripod Height Adjustable 33 to 53 inches (84 to 135 cm)
Semi-Pier Diameter 7.00 inches (17.780 cm)
Leg Diameter 3.50 inches (17.780 cm)
Weight approximately 66 lbs. (30 kg)


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