Stephen Stokes Posted July 18, 2010 Share Posted July 18, 2010 Started building the Propellosaurus by Cyrill Carr (RCM&E April 2009) Cut the depron but before I glue it together I have to shape the main sheet to set the dihedral. The write up says affix some parcel tape to it bend it then remove tape. I don't see how the depron will hold the shape.... Any advice any one. Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted July 18, 2010 Author Share Posted July 18, 2010 A few picts at the start of the build Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted July 22, 2010 Author Share Posted July 22, 2010 No worries Did a bit or research and played around with the depron an dent it to shape. will post some buld pic as I go. Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted July 24, 2010 Author Share Posted July 24, 2010 Well a bit of progress.>> Found a local supply of an alternative to Blue foam, Jewson stock cavity insulation board called …..Recticel cavity batts. It is an extruded polystyrene with foil both faces. The Foil is easy to removed. The foam is very light weight. When sanded there are a few open cells but they can be filled with one fill polyfiller. Also made some claws, Used garden wire and a pot of chemical metal from Halfords. >>Didn’t like the Cyril Carr version for a head so drew one myself, my 12 years old son also had a go and as his version was better than mine that’s what I built. Motor mount to the back of the head with a 10mm aluminium tube glued in to hold the bell motor. Just push the motor into the tube. >> As you can tell my model shop supplier so far is Jewsons and Halfords…nice and cheep. Quote Link to comment Share on other sites More sharing options...
David perry 1 Posted July 24, 2010 Share Posted July 24, 2010 Looks good! d Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted July 25, 2010 Author Share Posted July 25, 2010 Painted the head with deluxe materials Flexikote Glued it to the body To get the motor thrust angle I pushed a 1m long 8mm tube into the motor mount tube in the back of its head. With this I could check alignment. Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted August 7, 2010 Author Share Posted August 7, 2010 A littel ProgressTail on Glassed LE and tailControll surfaces added and servos installed Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted August 7, 2010 Share Posted August 7, 2010 Hi Stephen, I also have this plan but have thought it may be a little difficult to sculpture but you have done a good job of it . is there any carbon fibre rod for the wings . You may of inspired me to build one after all , i already have similar foam and depron . Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted August 7, 2010 Author Share Posted August 7, 2010 No rods in the wings, there is a 3mm rod in the head and the tail.I have used 0.6oz glass cloth wrapped around the leading edge and around the tail. This has made them very stiff, and light. The shiney strip on the wing is 25mm glass tape, dont think it need it. Quote Link to comment Share on other sites More sharing options...
Stephen Jones Posted August 8, 2010 Share Posted August 8, 2010 Hi stephen , I can see the glass tape but from your pictures i could not see any reinforcement . Do keep us posted Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted August 22, 2010 Author Share Posted August 22, 2010 Well I test flew before paining and the thrust angle and C of G were all wrong On power and she headed for the ground and broke her neck. Will glue the head back on looking up thus setting the motor pointing to the tail rather than parallel with the body. Will up date again soon.Edited By Stephen Stokes on 22/08/2010 08:38:37 Quote Link to comment Share on other sites More sharing options...
J Myers III Posted August 22, 2010 Share Posted August 22, 2010 Good job! Quote Link to comment Share on other sites More sharing options...
Gaz Elliott Posted August 22, 2010 Share Posted August 22, 2010 Why not adjust the mount so the head can stay at current angle Quote Link to comment Share on other sites More sharing options...
Dave Towell Posted August 22, 2010 Share Posted August 22, 2010 Love it! Just seen thread and am now really tempted to have a go myself will watch with intrest and might plan to do one over the winter. Keep us posted and Great work! Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted September 1, 2010 Author Share Posted September 1, 2010 You may have noticed I have actually built two of these beasties. My mate test flu the first one while I have been on holiday. Initial reports are the thrust angle is wrong and the C of G needs to be 10mm back from the recommended position. On the maiden with power on the thing headed for the ground, initial trust angle 0 degrees, with the motor parallel with the wing. Second flight at around 15 degrees, motor pointing at the tail she wouldn't climb under power and ailerons non responsive. The drawings have no recommended thrust angel so time to seek advice can anyone help? Quote Link to comment Share on other sites More sharing options...
Startazz No1 Posted February 24, 2011 Share Posted February 24, 2011 Sorry i can't help but i sure hope you have got the angles right now if not some one out there must be able to help out Can you give us any up dates to this build Please. Quote Link to comment Share on other sites More sharing options...
Stephen Stokes Posted February 25, 2011 Author Share Posted February 25, 2011 Hi Startazz, I posted the finished plane here Looks good in the air. chearsEdited By Tim Mackey - Administrator on 25/02/2011 17:59:25 Quote Link to comment Share on other sites More sharing options...
Tim Mackey Posted February 25, 2011 Share Posted February 25, 2011 Stephen..HERE .TY Quote Link to comment Share on other sites More sharing options...
Startazz No1 Posted February 25, 2011 Share Posted February 25, 2011 Thanks Stephen mate. Quote Link to comment Share on other sites More sharing options...
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