APS/Ω Gas turbine bike build

[Buickguy3]

  Anders, How wide is the driver?    Beautiful work.
   Doug 

[Mobacken Racing]

  Anders, How wide is the driver?    Beautiful work.
   Doug 

Mostly skin and bone, and I´ve taken up running to keep my frontal area as low as possible for the upcoming racing. No use getting into land racing half-hearted.

[Mobacken Racing]

With the counter is reset to "X hours to Speed Weekend" I need to get busy with the bike build, the bobber and the twin turbo jet kick has taken up all spare time up until now but from now on it is 100% turbine bike for me!



Last night I removed all wiring and fitted the engine in the frame to figure out where the frame can be strengthened without putting the tubes and steel plates where they are in the way when removing the engine.



Ahh, I do have ONE project that has higher priority than the bike build. My feancee wants a new floor in the house so I am in the process of doing just that. Only three bedrooms left before I have the workshop for myself again!



Cheers!
/Anders

[Scottie J]

That is freaking cool! Nice Work!        

[lsrjunkie]

Good to see you back at it Anders! Best of luck, and keep us updated! 

[Mobacken Racing]

Thanks!

Good to be back, you cannot even guess how eager I am to get busy with the turbine bike! 5 minutes ago I ordered a set of spiked motorcycle tyres for the bike and I am ebaying around to find some decent cheramic bearings for the gearbox.

Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders

[Scottie J]

........Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders

From the SCTA Rule Book in regards to footrests:

Footrests shall be provided as per requirements of the class entered and the rider shall use them during the entire run.  Foot controls shall be operable with feet on the footrests.  Only one set of foot rest is allowed.

Scottie J

[salt27]

Following the LSR rules, do motorcycle footpegs need to be foldable or can I simply weld a pair of CrMo tubes to the frame and be done with it?

Cheers!
/Anders

I have had both folding and fixed footpegs pass SCTA tech.

Fixed is my preference.

  Don

[wobblywalrus]

Norton Commandos, Nimbi, and Triumphs like mine use a large diameter backbone tube to give the frame strength.  Triumph uses a big square section tube.   

[Mobacken Racing]

Thanks for the clarification guys, welded foot pegs it is!

[Mobacken Racing]

Tonight I´ve started cutting out templates for frame strengthening plates in 3mm steel, the steering head will need three of them to aid the welds so I won´t drop the forks at speed...



The rear axle mount also got a pair of plates.



I started triangulating the rear of the frame when my littlest girl yelled on the Babywatch and I had to call it a night. That radio is worth its weight in gold for sure, countless late hours in the workshop that couldn´t have been done without it.



Cheers!
/Anders

[Mobacken Racing]

Tonight I finished making the templates for the 3mm sheet metal gussets.



I added a pair of CrMo tubes just below where the seat will be to lighten the load on the weld where the single upper frame tube ends.



At his point I removed the engine to see if any of the tubes would be in the way, they weren´t so I continued by removing the oil and kero tanks and air intake so I could add a couple of strengthening tubes between the lower frame tubes.



Here you can see them a bit clearer.



The biggest progress tonight is probably that I think I have figured out how to make the seat and the rear fairing for the bike, I won´t tell you in case I change my mind but if it works it should look pretty good.

Cheers!
/Anders

[saltwheels262]

using and triangulating bigger OD tubing might be a lot stronger .
 
also in place of some gussets .

[Mobacken Racing]

using and triangulating bigger OD tubing might be a lot stronger .
 
also in place of some gussets .

Hmm, perhaps the two tubes between the lower frame tubes could be upsized to the same tube diameter as the rest of the frame. Thanks for the hint!

I´ve planned to add a few gussets to them, a bit difficult to figure out just where the gussets are needed when I haven´t any fancy computer simulation to play around with but I think I´ll manage. When I start road testing it I will find out how well it is done.

Cheers!
/Anders

[Mobacken Racing]

Last night I spent three hours welding some of the gussets to the frame, I also removed the two thin bars between the lower frame tubes and replaced them with 1 1/2" CrMo tubes just like Saltwheels262 suggested. Looks much sturdier now, thanks for the hint!









Cheers!
/Anders