Click here if you are having trouble logging into the forums Cloudy Nights - Official Forums of the 2009 International Year of Astronomy Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Equipment Discussions >> ATM, Optics and DIY Forum Previous   Index   Next   Threaded   Pages: 1 paul sage Reged: 04/14/05 Posts: 208 Loc: pa Three pole truss shroud       #2622327 - 09/03/08 09:05 PM Edit   Reply   Quote Quick Reply   Hello,''I just completed my 3 pole truss conversion. I am trying to figure out how to rig up a shroud. Any ideas?? Thak you Paul -------------------- Coulter 13.1 Swayze optics Edmund 4 1/4 space conquerer Tasco 10TE w/motordrive Takahashi FS-102 Post Extras:       Don W Postmaster Reged: 05/19/03 Posts: 13240 Loc: Wisconsin, USA Re: Three pole truss shroud [Re: paul]       #2622377 - 09/03/08 09:31 PM Edit   Reply   Quote Quick Reply   How about some shock cord where the other truss poles would have gone? -------------------- Don Wyman Obsession 18" f/4.5 #1166 W/Argo Navis DSC and Torus Primary William Optics Megrez 90 Coronado PST Post Extras:       Tom L Reged: 01/07/04 Posts: 29817 Loc: Sunny Oregon Re: Three pole truss shroud [Re: paul]       #2622379 - 09/03/08 09:32 PM Edit   Reply   Quote Quick Reply   Sure do! Get some hoops at the local hobby store that will fit around the outside of your poles. Buy some stretchy black material at the local fabric store that will fully cover the space from mirror box to UTA. Make a tube out of the fabric that is 1/2 - 1" smaller than the hoops. Arrange the hoops inside the fabric tube that equidistant from each other along the fabric tube you just made (I planned to use 5 hoops) and sew a loop around the hoop through the fabric to keep them in place. This will collapse very nicely and if you sew velcro straps on the ends you can secure it any way you want to. This is the TomL shroud for 3-pole ultralites, specifically design for "Endurance". -------------------- Tom Tele Vue 102mm f/8.6 on an EzTouch Vixen 80mm f/5 A80SSWT on a grab-n-go mount Post Extras:       jayscheuerle Carpal Tunnel Reged: 01/16/06 Posts: 2990 Loc: S. Philadelphia, PA Re: Three pole truss shroud [Re: Tom L]       #2623075 - 09/04/08 09:24 AM Edit   Reply   Quote Quick Reply   You don't even need hoops. An inch-wide length of formica (maybe 2-ply) may hold its shape well enough when curled into a circle. - j -------------------- 12" Green Goblin (trusser w/Protstar secondary and OWL refigured primary)• 6" f/5 Eero2 ball-scope • 6" f/5 Frankenscope • Garrett Optical 10x50 binos • Edmund 8" yoke-mounted red-tube reflector • Edmund 6" GEQ red-tube reflector (on loan to Dad) Gone, but with lessons learned: Skyquest XT8 • NexSTar 8i • Eeroscope 6" f/5 ball(sacrifice was not in vain) • Vixen ED80sf • Edmund red-tube 4.25" f/10 • Edmund Astroscan Facts are stubborn things. Post Extras:       Gregg Lobdell sage Reged: 01/20/06 Posts: 373 Loc: Covington, WA Re: Three pole truss shroud [Re: jayscheuerle]       #2624348 - 09/04/08 08:08 PM Edit   Reply   Quote Quick Reply   Thin fiberglass poles from a kite shop also work as hoops. -------------------- Clear skies, Gregg Post Extras:       epee professor emeritus Reged: 11/30/06 Posts: 582 Loc: Suh-van-nuh, Jaw-juh Re: Three pole truss shroud [Re: Gregg Lobdell]       #2624362 - 09/04/08 08:16 PM Edit   Reply   Quote Quick Reply   How about one of those collapsible fabric play tunnels for kids? http://www.amazon.com/s/ref=nb_ss_gw/103-3176156-0915058?url=search-alias%3Dtoys-and-games&field-keywords=tunnel Disney Princess would look very cute on a large dob -------------------- Jim Girardeau Orion XT12 Intelliscope Celestron 11X80mm binoculars Post Extras:       Tom L Reged: 01/07/04 Posts: 29817 Loc: Sunny Oregon Re: Three pole truss shroud [Re: epee]       #2624790 - 09/05/08 12:36 AM Edit   Reply   Quote Quick Reply   I want the Thomas the Tank tunnel! -------------------- Tom Tele Vue 102mm f/8.6 on an EzTouch Vixen 80mm f/5 A80SSWT on a grab-n-go mount Post Extras:       RRavneberg professor emeritus Reged: 12/02/05 Posts: 632 Loc: Columbus, OH Re: Three pole truss shroud [Re: Tom L]       #2625473 - 09/05/08 12:18 PM Attachment (6 downloads) Edit   Reply   Quote Quick Reply   Do you actually need a shroud? If the scope is designed such that the mirror box and secondary cage are well baffled, it may be that no shroud is necessary. I remember a conversation many years ago with Dave Kriege when he commented that the main reason he initially put shrouds on scopes was to keep the dirt from people's shoes from getting on the mirror as they climbed up the observing ladder. He continued making shrouds on smaller telescopes because people "expected" them. I've worked with two-strut scopes for years in dewey Ohio and have never suffered and dewing of the primary or noticeable ambient light (or splash marks on the primary caused by drops of water dripping off the inside of the shroud). -------------------- Ron Ravneberg Post Extras:       Pages: 1 Previous   Index   Next   Threaded   Extra information 5 registered and 9 anonymous users are browsing this forum. Moderator:  Don W, Joe Cipriano  Print Thread Forum Permissions       You cannot start new topics       You cannot reply to topics       HTML is disabled       UBBCode is enabled Thread views: 216 Jump to *International Year of Astronomy 2009* -----   Global Coordination   Cornerstone Projects   Special Projects   Special Task Groups   Global Activities   National and Regional Activities   IYA 2009 in Africa   IYA 2009 in the USA*Announcements and News* -----   Cloudy Nights Announcements   Discussion of CN Articles, Reviews, and Reports   Beginners Forum   Celestial Events   Light Pollution*Equipment Discussions* -----   ATM, Optics and DIY Forum   Binoculars   Binoviewers   Cats & Casses   Classic Telescopes   Equipment   Eyepieces   Mounts   Observatories   Reflectors   Refractors    Celestron SkyScout and Meade mySky   Video and Electronically Assisted Astronomy*Astrophotography and Sketching* -----   Beginning Imaging   Film Astrophotography   DSLR & Digital Camera Astro Imaging & Processing   CCD Imaging & Processing   Solar System Imaging & Processing   Sketching   Astro Imaging/Sketching Contest *Observing* -----   General Observing   Planetary and Solar System Observing   Lunar Observing   Deep Sky Observing   Double Star Observing   Solar   Variable Star Observing and Radio Astronomy*Telescope Specific Forums* -----   Celestron NexStar    NexStar GPS / CPC Telescopes   Questar Forum   Meade ACF/RCX / LX / GPS    Meade ETX*Other* -----   Science of Astronomy & Space exploration   AstroWebsites   Space Rocks*Speciality Forums* -----   AstroArt   Astronomy Software & Computers   Stellar Media   Astro Outreach, Clubs and Star Parties*CN Feedback and Vendor Announcements* -----   Vendor and Group Announcements Home

Cloudy Nights Sponsor: Astronomics