SKULD 666

[racket]

Turning "the corner" and release angle on axial wall of diffuser , 2 part filler ( bog) fillet on inside of wall to support and strengthen wall as well as provide release angle .

[pitciblackscotland]

Hi John,
I can see you have put a lot of work on these wooden patterns. I hope they arrive safely down to Melbourne.
LOL i can see you just have enough room to spin up the diffuser wall .

Cheers,
Mark.

[racket]

Hi Mark

LOL....they'll be heavily bubbly wrapped for sure :-)

Still lots more to do on the diffuser , will try and glue on the wedges today ,....... then the difficult part, "turning the corner" , I have to work out a way to keep a smooth flowing duct whilst meeting the requirement of a "release angle" before and after the split joint ..................heh heh , such fun .

Cheers
John

[Johansson]

Really interesting to see your pattern work John, very inspiring. =)

Cheers!
/Anders

[racket]

Hi Anders

Its slowly getting there :-)

Cheers
John

[racket]

Gluing on the diffuser wedges



Closeup of wedges, left over length to be trimmed back to size once the axial sections are added .

[pitciblackscotland]

Hi John,
Looking the part I'll be having a chat to John from Lilydale Engineering on Saturday night, they are coming over to my folks place for dinner. So i have made a list of things to ask him about.
So we need 2x 500mm lengths of 2 inch DIA 4140 High Tensile steel rod ??. Anything else we need at this time?.


Cheers,
Mark.

[racket]

Hi Mark

LOL ......a coupla lengths should see us out at this stage :-)

Started making the axial bits for the pattern yesterday , what a bugger of a job , theres about 10 different facets on each of them and they all have to be at the right angle so the pattern can release from the sand , I've got 2 glued on so far , had to buy a cheapo disc/belt sander to be able to get any sort of accuracy with the facets.......a few days tedious work coming up .............but its coming together as I want it .

Cheers
John

[racket]

Hi Mark

How do you like the avatar pic of "Frank" when he was thrust powered , the "elephantine" jet nozzle was an interesting construction exercise , thin walled metal downpipe bends , those crimped type , were wire wound to give extra strength :-)

Cheers
John

[pitciblackscotland]

Hi John,
I haven't seen that pohto of Frank with the thrust powered set up. NICE Did you get any speed with that set up???.

Cheers,
Mark.

[racket]

Hi Mark

Nope , only moved it around the backyard , I think I calculated a top speed of ~130 kph , but I went onto the freepower before having a chance to roadtest it

Cheers
John

[Johansson]

Imagine all of us jetbikers here at JATO (yeah Cris your pocketbike counts ) having a meet a couple of years from now at Santa Pod, oh glory the amounts of kero and beer that would be consumed!

[turbochris]

heh, that would be cool as hell....

[racket]

Axial wall of diffuser passageways added and profile of the external machined



Diffuser pattern front side just about finished , only a recess for the comp needs machining into the face

[racket]

Rear wall bracing going in



there will be 6 brace pieces connecting every third diffuser vane to the central boss that will bolt to the shaft tunnel