bissilom wood (Khaya senegalensis)

[spearq8]

Why such a big hook ??? The hook is only to hold one diameter of line across. I would make that hook so it just barely holds one diameter of say 400lb mono ... anything else is just there to cause problems.

[Behslayer]

Cool. Looks similar to Sea Sniper system. Majd, he will still add a bend to that Hook so it is lifted. Doyen, Looks like you will need to either add a little more scoop to wood recess of the muzzle or be very careful deburring the edges so the rubber is not degraded.

[doyenofcastle]

Originally Posted by Diving Gecko

Doyen, quick question since I am still confused about this. Are you manually shaping your blank or CNC cutting it?

Thing is, I might have misunderstood you earlier, as in other threads I have seen CAD images of your guns, but maybe in this thread, you meant that you were just CNC cutting the metal only and not the blank? If that is the case, then you can disregard the whole thing about just using the CAD to tell you your volume and buoyancy;-)

I am using solid edge for laser cutting the SS then TIG weld for some parts ,also for getting approximate weight for stock before any woodworking , ARTCAM for 3D axis CNC only straight cut and outer profile , shaping will be done manually by router ,sander and planner .

[doyenofcastle]

Just got these strips today and I pick some iroko for new trial ,I compare the denisty of theses bissilpm to one I bought 3 months ago and its lower denisty ! 0.7 to 0.8 !
Can I glue the both different denisty or it may delaminate?

[Xylophone]

Originally Posted by doyenofcastle

Just got these strips today and I pick some iroko for new trial ,I compare the denisty of theses bissilpm to one I bought 3 months ago and its lower denisty ! 0.7 to 0.8 !
Can I glue the both different denisty or it may delaminate?

You can mix woods, but if you do you'll probably want to make sure you epoxy coat the gun. If you oil finish the woods may absorb water and swell differently and cause delamination or warping.

[doyenofcastle]

I will epoxy coat the pieces and I have new shape in my mind but don't know which tools I should buy ,I have small manual planner but I need sanding tools ,any suggestion ?stock wider in center not equal width (2 to 3 )in

[doyenofcastle]

i just got the bit and tried on an old mahogany piece was setting in corner for a year

[doyenofcastle]

Wood rested for a Month and I start to glue it
Its full of oil and After I use local thinner to clean it I notice some area still have like a bleed through tried xylene but not moved so I just glue them and I ll take sample to test it by hammer for a 1cm2 I need 0.028 mL epoxy (180 cm length*4.5cm width *12 side *0.028= 270 mL epoxy I used 300 and it was enough by brush spread in both surfaces )

Sent from my SM-A320F using Tapatalk

[Behslayer]

Looks like Sapele. Doyen, why not go down to the harbor and look at what all of the old Boats are made of. I'm not sure what you call them there in UAE but Dao's or Prams or Phinissi.. etc. The local wooden boats which have been used for thousands of years. Whatever woods they are using for decking, hull (if it's not tooooo heavy), mast, oars, rudders. Those woods will be available locally and there will be some old men who know more about those woods than any book and can advise you on which pieces to select and how to cut etc.

[doyenofcastle]

Originally Posted by Behslayer

Looks like Sapele. Doyen, why not go down to the harbor and look at what all of the old Boats are made of. I'm not sure what you call them there in UAE but Dao's or Prams or Phinissi.. etc. The local wooden boats which have been used for thousands of years. Whatever woods they are using for decking, hull (if it's not tooooo heavy), mast, oars, rudders. Those woods will be available locally and there will be some old men who know more about those woods than any book and can advise you on which pieces to select and how to cut etc.

Only here burmes teak very expensive next woods are equal in prices
Iroko and dabema give me chest pain
African Mahogany light not for big dimension ,tried oak but dont like it
Padouk already working in now and opepe recently i tried and cracks along glue lines it take so long to get dry similar to merbau but more durable ,i just want to check this new bisilom ,Did u try makore?

Sent from my SM-A320F using Tapatalk

[doyenofcastle]

bringing it back from the grave
I have made 2 gun and results is good till now ,both from same wood but different stock so the biggest have specific denisty approx. 0.8 other is aroud 0.54 (similar to mahogany) I think its kosipo ,I order DR and EVO back DR from ermes .

[doyenofcastle]

I reduce the butt thickness to 15mm and built 5mm with epoxy /collidal silica to increase the strength rather than using SS plate ,this new idea ,anyone done this before ?

[spearq8]

I wouldn't trust it. Much better would be to wrap it with carbon fiber. Having the strength around the wood is structurally the strongest. Using CF will make it stronger than using SS. If this breaks it can be catastrophic if it happens at depth. Nothing is 100% but you want the safety factor as close to that as possible.

[doyenofcastle]

I think I ll use evo back DR for all my 2-3 bands speargun ,much easier to install and cost is less ,DR is suited for mass bands and big heavy loads ,waiting to see the clear water ,have access to CNC machines so every thing was made locally but of course wood is imported ,mahogany handle was my first weak point before but I have made breakthrough using some technique to made an ergonomic handle by CNC 3D router,
I have extra pieces from every parts for any one want to save the headache of making handle ,second weak point was the coating and the easiest solution was to warm the epoxy before applying and it look shiny no bubbles like before ,still I need to take the final photos after fixing the triggers .

[doyenofcastle]

Update