|50 kg instrumentation
load - not a problem for an Alluna RC
The design of our telescopes with
a complex honeycomb structure milled from solid aluminium, provides extremely
high strength and stiffness. Made from solid aluminium plates with a gross
weight of ~ 340 kg only a weight of about 40 kg (RC20) is left at the end
for all seven major bearing milled parts.
Thus, for example, the average truss
plate has a thickness of 55 mm (RC20) and weighs only a few pounds but
still has the stability and twisting ability of a 55 mm thick plate. Here
other manufacturers use plates with thicknesses of 10 to 20 mm.
Truss plate in FET analysis
Finished milled truss plate
A high load instrument without the
slightest shift of the optical axis requires great design and technical
manufacturing effort. Not only the backplate must hold the loads, but also
the mounting plate and saddle plate.
But otherwise our telescopes are
prepared for all eventualities. For example, the upper mounting plate,
which is often used for holding small refractors, is quite capable of holding
even larger and heavier refractors without restrictions.
All this is only possible with modern
CAD programs and FEA (finite element analysis). This ensures that all parts
can be optimized for weight, stability and expansion behaviour in advance.
The extensive FEA additionally helps to analyse all structural stress through
simulation and is therefore an important tool.
If you want to use larger instrument
loads on our telescopes, please contact us. We can take the appropriate
steps based on your requirements and integrate the desired mounts right
into the design and manufacturing.
Three CCD cameras at the output
of a 20 inch Alluna RCs/weight 45 kg
These solid aluminium panels, with
more than 1 ton in weight,
can accommodate three telescopes.
The finished machined parts together weigh only 120 kg.
..... while processing
..... Part machined milled parts
to Alluna Optics Ritchey-Chrétien teleskopes