Re: Pietenpol-List: Fuselage wedges on sides
Posted: Thu Sep 03, 2009 4:58 am
Original Posted By: Michael Perez
If it calls for wedges, I would say use wedges.....otherwise it wouldn't call for wedges. :)Any particular reason for wanting to make two mitered cuts to fit the crossmembers instead of one?I believe in one of Tony B's books he gives examples of the various ways you could fit crossmembers when building wing ribs, and those principles would carry over to the fuselage. It doesn't so much matter how you fit the intersection of crossmembers and longerons. You gain no more strength from your double mitered joint on the right than is given by the plans fitment on the left, as zero strength is derived from the butt joints of crossmember-longeron-crossmember. All of the strength of that joint comes from the gussets tying everything together. The plans fitment requires only one mitered cut; multiply that out over all the pieces you have to fit and you'll save some time and hassle.As an aside, the plans fitment on the left appears to cover more surface area, but I would imagine that's because this is not an exact, scale representation of the joint/gusset....RyanOn Thu, Sep 3, 2009 at 6:38 AM, Michael Perez wrote:The plans call for wedges in certain locations on the sides of the fuselage. I have attached a picture of what the prints show and what I am doing. On the left of the vertical piece, the print shows the angled piece attaching as shown at the bottom. On the right of the vertical, the way I am cutting my pieces to fit. (Angle cut both sides of the piece to fit up against vertical piece.) -Cutting in this way, I wonder if the wedge is necessary?- Using the print sized 2-1/4" gussets, the wedge for "my side" of the drawing are very, very small.-(Having said all of this, I am using the wedges to fill the area under the gussets....just curious if it is required.)________________________________________________________________________________Date: Thu, 3 Sep 2009 08:53:00 -0700 (PDT)
If it calls for wedges, I would say use wedges.....otherwise it wouldn't call for wedges. :)Any particular reason for wanting to make two mitered cuts to fit the crossmembers instead of one?I believe in one of Tony B's books he gives examples of the various ways you could fit crossmembers when building wing ribs, and those principles would carry over to the fuselage. It doesn't so much matter how you fit the intersection of crossmembers and longerons. You gain no more strength from your double mitered joint on the right than is given by the plans fitment on the left, as zero strength is derived from the butt joints of crossmember-longeron-crossmember. All of the strength of that joint comes from the gussets tying everything together. The plans fitment requires only one mitered cut; multiply that out over all the pieces you have to fit and you'll save some time and hassle.As an aside, the plans fitment on the left appears to cover more surface area, but I would imagine that's because this is not an exact, scale representation of the joint/gusset....RyanOn Thu, Sep 3, 2009 at 6:38 AM, Michael Perez wrote:The plans call for wedges in certain locations on the sides of the fuselage. I have attached a picture of what the prints show and what I am doing. On the left of the vertical piece, the print shows the angled piece attaching as shown at the bottom. On the right of the vertical, the way I am cutting my pieces to fit. (Angle cut both sides of the piece to fit up against vertical piece.) -Cutting in this way, I wonder if the wedge is necessary?- Using the print sized 2-1/4" gussets, the wedge for "my side" of the drawing are very, very small.-(Having said all of this, I am using the wedges to fill the area under the gussets....just curious if it is required.)________________________________________________________________________________Date: Thu, 3 Sep 2009 08:53:00 -0700 (PDT)
>> Any particular reason for wanting to make two mitered cuts to fit the> crossmembers instead of one?>> I believe in one of Tony B's books he gives examples of the various ways> you could fit crossmembers when building wing ribs, and those principles> would carry over to the fuselage. It doesn't so much matter how you fit the> intersection of crossmembers and longerons. You gain no more strength from> your double mitered joint on the right than is given by the plans fitment on> the left, as zero strength is derived from the butt joints of> crossmember-longeron-crossmember. All of the strength of that joint comes> from the gussets tying everything together. The plans fitment requires only> one mitered cut; multiply that out over all the pieces you have to fit and> you'll save some time and hassle.>> As an aside, the plans fitment on the left appears to cover more surface> area, but I would imagine that's because this is not an exact, scale> representation of the joint/gusset....>>> Ryan>>> On Thu, Sep 3, 2009 at 6:38 AM, Michael Perez > > wrote:>>> The plans call for wedges in certain locations on the sides of the>> fuselage. I have attached a picture of what the prints show and what I am>> doing. On the left of the vertical piece, the print shows the angled piece>> attaching as shown at the bottom. On the right of the vertical, the way I am>> cutting my pieces to fit. (Angle cut both sides of the piece to fit up>> against vertical piece.)>>>> Cutting in this way, I wonder if the wedge is necessary? Using the print>> sized 2-1/4" gussets, the wedge for "my side" of the drawing are very, very>> small.>>>> (Having said all of this, I am using the wedges to fill the area under the>> gussets....just curious if it is required.)>>>> *>> " target=_blank rel=nofollow>