bracesport DLG

bracesport · Jun 30, 2019

the fuse and tail printing want well - I hope I can get the CF boom and servos in this week - to aid assembly I plan to use servo stoppers!

bracesport · Jun 30, 2019

@Wildthing @flyboa - thinking more about my ironing tests in the weekend I am going to try to flatten three faces with enough flat at the CG line to force a curve into the chord - the ironing works really well with a point to point taper using metal guides - given the ironing process secures the paper to the surface very well I plan to remove the paper from the flat sides for glueing - this will require both halves to flex during the glueing, but might have the benefit of better paper adhesion and a good foam to foam bonding - I feel another experiment is in order!

The purpose is to remove sanding (or most of it)!

bracesport · Jul 1, 2019

Using the iron at work I tried again - sadly it had a little water in it and created a bit of steam - the steam loosened the paper, but still did a great job on the tapers, so you guessed it I peeled the paper and glued the halves foam to foam as shown below.

currently waiting for the Gorilla glue to set!

Wildthing · Jul 1, 2019

bracesport said:
Using the iron at work I tried again - sadly it had a little water in it and created a bit of steam - the steam loosened the paper, but still did a great job on the tapers, so you guessed it I peeled the paper and glued the halves foam to foam as shown below.

currently waiting for the Gorilla glue to set!

View attachment 135032

I just did a experimental piece. Oh, bare foam when you get it really hot it will stick to normal paper , basically you can melt them together. ( with me not using FB I don't want it to stick

so I experiment with different paper and parchment paper is just awesome, I can melt the crap out of the foam and they won't stick together. The reason for me to use paper was because I was using the sock and it would stick and I didn't want to get the iron filthy. The initial picture shows four layer but I took one off, the second & third

picture is all iron

bracesport · Jul 1, 2019

this is fun!

bracesport · Jul 1, 2019

here is the sample from the info @ post#123 - actually it worked a treat - this wing foil is 165mmx11mm for the DLG - there is no spar, just a two sheet lamination a-la flyboa - no sanding other than the LE cap!

@flyboa - now I need to try a full wing!

Wildthing · Jul 2, 2019

bracesport said:
here is the sample from the info @ post#123 - actually it worked a treat - this wing foil is 165mmx11mm for the DLG - there is no spar, just a two sheet lamination a-la flyboa - no sanding other than the LE cap!

@flyboa - now I need to try a full wing!

Very slick, well done.

bracesport · Jul 2, 2019

@Wildthing - team slick!

bracesport · Jul 2, 2019

I printed the templates for the wing and tail feathers - it is time to get busy and build me a fuse (still need to find some 2mm balsa and some more FB)!

Wildthing · Jul 2, 2019

bracesport said:
I printed the templates for the wing and tail feathers - it is time to get busy and build me a fuse (still need to find some 2mm balsa and some more FB)!

View attachment 135174 View attachment 135175 View attachment 135176

Well if you would quit melting all your FB you would have some!!!!!!!!!

bracesport · Jul 2, 2019

fitted the pushrod sleeves into the CF boom - this fuse will be set up for four servos - also attached the boom to the fuse (so far so good)!

bracesport · Jul 2, 2019

3/32 balsa tail feathers roughed out - @flyboa do you treat the balsa with anything?

flyboa · Jul 3, 2019

@bracesport I leave mine bare. A pair of my hinged balsa tails weigh only 7.5g.

bracesport · Jul 3, 2019

I am thinking I will attempt to hinge the feathers with my 'mini' cable tie method! The balsa is about 2.5mm thick so a trial will be in order first!

bracesport · Jul 3, 2019

in making a lightweight wing in the style of flyboa we would remove the paper from the faces that are gluers together - if we use the ironing method the paper re-sticks to the foam when it melts - today I removed the paper and used baking paper between the iron and the foam which works well - progress!

Wildthing · Jul 4, 2019

bracesport said:
in making a lightweight wing in the style of flyboa we would remove the paper from the faces that are gluers together - if we use the ironing method the paper re-sticks to the foam when it melts - today I removed the paper and used baking paper between the iron and the foam which works well - progress!

The baking paper is probably the same as parchment paper. You can get the foam to molten lava and it doesn't stick

.

bracesport · Jul 4, 2019

here we go with the micro-cable-tie hinges - I use a cold chisel to knock a V into the cable ties - this time I cut slots into the balsa and used the CA glue to lock them in place - spacing between hinges is 90mm - PP should have an awesome 'flex' life

my 'Vista' and 'V tail DLG' already use these hinges without issue!

bracesport · Jul 4, 2019

I realised I had made the vertical stabiliser mount for 2mm Balsa 9turned out to be 2.5mm) so I will print a new one! In the meantime, it was time to start the tail assembly starting with the horizontal stabiliser onto the boom followed by fitting the first servo and pushrod - this is my first time fastening control surfaces and control arms with CA so I hope it will be robust - I also opted for servo savers to make the adjustment easier (another first for me) - the two 0.8mm pushrods in the boom will cost me some weight, but I am not confident yet to do a pull string (maybe next time)!