flyrotary@lancaironline.net Mailing List Archive

Thanks Ed, I had the same impression that Bob P. had that you were building a bi-fold door. I was really looking hard for the cylinder on the near side, and couldn't see it. After seeing the second photo and staring at the first one a while, I think there is just a small section of it showing and not quite where I expected it. It seems like the ram is helping to support the door in a way that reduces the outward pull on the top of the hanger. I'm renting space in a homebuilt hanger. The homebuilt doors are folding doors that don't quite open as easily as one would like. I may see if I can talk him into building a new door similar to yours. Bob W. On Sun, 13 Aug 2006 14:13:11 -0400 "Ed Anderson" <eanderson@carolina.rr.com> wrote: Hi Bob, Thanks. No, the bar is actually the 12 foot long hydraulic ram extended to its full open position (6 feet retracted). I have a 3x2 metal tube acting as the frame tied into the front sheet metal. The front sheet metal acts as the web of a large "I" beam making it very stiff. To counter the tendency of the door to pull the top away from the hangar, I have 3 lengths of angle iron tied to the metal beam and then back 4 rows into the arch structure. However, I found that the very ends of the metal beam (where it attaches to the supporting posts) tends to torque a small amount when the door is fully open. So I will need to stiffen that area on each end of the beam - but, no major work required. The hydraulic pressure measures 450 psi when the door is fully extended. The system can put out 2500 psi and the rams (one on each end of the door) are capable of pushing with a combined force of 8,800 lbs with that pressure - so I do have a bit of margin {:>) Here is a photo from the other side where you can see the other cylinder as well as the hydraulic power pack on the floor under it. Ed ----- Original Message ----- From: "Bob White" <rlwhite@comcast.net> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net> Sent: Sunday, August 13, 2006 1:46 PM Subject: [FlyRotary] Re: Emailing: DoorOpenLside.jpg > Hi Ed, > > Looks great. > > Is the bar on the far side a permanent part of the support? Did you > have to put any bracing behind the top front of the hanger to handle > the weight hanging out when the door is open? > > Bob W. > > > > On Sun, 13 Aug 2006 13:03:10 -0400 > "Ed Anderson" <eanderson@carolina.rr.com> wrote: > >> Ok, folks. >> >> Here it is, the hangar door completely open. Minor sag at the junction >> of 2x4 on front-most edge and some torquing of metal beam at the ends >> where it meets the supporting post. Will stiffen with some plate and >> angle iron. >> Given no sheathing (yet) to stiffen the structure, I am very pleased with >> the results. >> >> If anyone wants more photos, send me an e mail >> >> Ed >> >> >> The message is ready to be sent with the following file or link >> attachments: >> DoorOpenLside.jpg >> >> Note: To protect against computer viruses, e-mail programs may prevent >> sending or receiving certain types of file attachments. Check your >> e-mail security settings to determine how attachments are handled. > -------------------------------------------------------------------------------- > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ >