Deep Space Products
Quote:The Category 1 Fastar-Only models are for SCT that have the Fastar secondary but do not have rear vents like the Edge HD scopes or for people who only want to use the Fastar fan for fast cool down of an Edge HD or other rear-vented Fastar SCT. To use that model the rear of the scope has to be left open if there are no rear vents. The Fastar-only model is strictly for initial cool down of one of the Fastar-capable Celestron SCTs. In order to view or image with the scope the Fastar fan must be removed and the secondary replaced.
Quote: The Category 2 and 3 models are for the Edge HD, CPC Deluxe and new Celestron SCTs that have built in vents in the rear cell. In these models, the rear vents are replaced with active fan systems that push and pull air through the OTA and can be run all of the time. The vent fans are installed in the OTA and remain there. They can also be combined with the Fastar fan for initial cool down of the scope.The vent fans are identical. However, the the egress fan flow can be increased by removing the filter from that fan for increased air flow. The total air flow depends on which scope is being used due to the different size fans required. The follow are what I currently use for the vent fans:C8 - 0.7 CFM per fanC11 - 3.0 CFM per fanC14 - 1.2 CFM per fanThe Fastar fans have much higher CFM. Unfortunately, I was forced to go with a smaller fan in the vents for the C14 than the C11 due to the surprisingly small C14 vent size.
Quote: The idea of the vent fans is to not only help the primary mirror stay close to the ambient temperature but to help break up the air currents in the tube. There are two threads started in the Solar System Imaging and Processing forum that depict the results obtained using the vent fan system on a Edge HD C11. MarsJupiterI'm not sure what you are looking for in regards to airflow data and test diagrams. I can tell you that when I first started out on development I found that a single vent fan on the C11 could pull a vacuum in the OTA sufficient to draw air in the other side.
Quote:One of my customers/testers is planning on collecting some quantitative data on the fan performance and effect once he gets some clear skies.
Quote:Quote:One of my customers/testers is planning on collecting some quantitative data on the fan performance and effect once he gets some clear skies. Hi Ed, Did you have any progress on this ? CheersSedat
Quote:Can I wire the the fans so that both work as egress fans ? Thanks