---------------------------------------------------------- Pulsar-List Digest Archive --- Total Messages Posted Thu 05/23/13: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 10:43 AM - Re: Re: Rotax 912 mounting options?.... (HUGH COULTER) ________________________________ Message 1 _____________________________________ Time: 10:43:14 AM PST US From: "HUGH COULTER" Subject: Re: Pulsar-List: Re: Rotax 912 mounting options?.... I have not seen anyone mention that the 582 Pulsars had blue foam ribs. If you move the fuel to the wings the fuel fumes will eat up the ribs. Clarke On Wed, 22 May 2013 22:22:56 -0400 (EDT) GREGSMI@aol.com wrote: > Your assumption on the Jabiru weights is wrong. The 2200 >Jabiru is 15 > pounds heavier than the installed wet weight of the 582, >making it a good swap. > Do not forget, the gross weight is limited by the wood >spars. > > I am sorry Matt, I cannot support you in this endeavor. >You are using a > proven design to make a new airplane. When you are done, >it may look like a > Pulsar, but with all of the modifications, it will >become your own design. If > you want a 912 Pulsar there are plenty of those out >there and I am sure > you can find one for sale. There is one on >Barnstormers. > > Greg > > > In a message dated 5/22/2013 8:27:21 P.M. Central >Daylight Time, > mattbrock777@gmail.com writes: > > --> Pulsar-List message posted by: "mjb777" >_mattbrock777@gmail.com_ > (mailto:mattbrock777@gmail.com) > Thanks for that information Greg, > > I have started an analysis on wing, wing/ gear mounting >and fuselage loads > and reinforcement. (I commenced this a while ago using >the Aerovee VW > engine). Once loads are calculated, I'll be looking at > reinforcing the inside > surfaces of the fuselage shells with uni-directional >tape which would allow > me to distribute loads more specifically and >accurately, to give the same > or greater strength as the additional 6 Oz of glass >used in th XP, but use > a lot less material and therefore result in less >weight. It would look like > a 2D composite version of a steel truss type structure >projected onto the > shells. (Same theory as the load bearing structure >created by the tape used > to reinforce the lower engine cowling/ mount). > > the Landing gear and wing "box" structure will be > reinforced accordingly > after analysis and design, and the fuselage and tail > analysis goes from > there. It also starts at the engine mounts (bed at this > stage) and load paths > are also developed and combined. I have been looking > into either a pure > carbon or aluminium horizontal stab tube and would be > interested to know the > wall thickness of the XP horizontal stab aluminium tube > as it would help to > be able to compare my calculated required strengths and > modulus to what was > originally used with the XP there also. > > As far as the fuel tank problem is concerned, I have a >copy of the wing > tank supplement and at this stage my intention is to >make fully molded wing > tanks which mount the same way as the XP wooden spar >version, but will have > less joins and fiberglass ribs to remove/ reduce the >likelihood of foam rib > and leakage issues. I'll also be using ethanol >resistant resin. (Of course > I wont bother if the C of G element of the analysis >works with the > "header" style tank, it's a "Plan B" thing). > > I can assure you that all of my calculations will be > checked by an > aeronautical engineer prior to construction. Components, >the entire airframe and > flying surfaces will be static load tested. Standard >stuff and a lot more > thought and testing than most re engined/ modified >homebuilt aircraft get, > (Probably Pulsars included!). I'm not looking to go >faster or make it > aerobatic. > > I have seen pictures of Pulsar 1's converted to Jabiru >2200 engines using > a bed mount and with the header tank, and it has been >recommended to me to > use the Jabiru engine previously, it appears to have a >very similar weight > to the 912? I'm guessing these aircraft wouldn't have > been structurally > improved and probably only had the 900lb spar at >maximum? (See Pictures of one > example). > > My AC is a Tail dragger so the nose gear failure issue >isn't a concern. We > will use the Grove aluminium gear. (The original >fiberglass/ foam gear is > still available if someone needs it, but its not worth >my job trying to > "sneak" it along for a ride in the 777. The guys I fly >for don't have much of > a sense of humor!). > > Why would I bother going through this instead of >disposing of my kit and > doing it the easy way? I have the kit, it is a great >Aircraft with loads of > potential, and this is what sport aviation is all about >when done properly! > (.......And Sonex's don't have the curves!). > > So........... do you have the XP manuals available? > [Wink] > > -------- > Pulsar 1 TD Kit. > Captain B777. > Licenced Aircraft Maintenance Engineer. > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=401159#401159 > > > > > Attachments: > > http://forums.matronics.com//files/5920_4_pulengine_162.jpg > http://forums.matronics.com//files/5920_6_pulintake_453.jpg > > > > > > > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message pulsar-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Pulsar-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/pulsar-list Browse Digests http://www.matronics.com/digest/pulsar-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.