1/3 Scale Austin Seven Engine

[metalmad]

Top Stuff Rob!
Pete

 

[RManley]

Amazing work. This is going to be a really nice looking engine when its finished, shame most of the detail will be hidden away inside.
I just hope that you have a 1/3 scale austin racer planned to put in into...

Rob.

 

[stevehuckss396]

Hard to judge the size of the part. Next time you take photos can you get a shot of it in your hand or next to a soda can? Everything looks great so far!

 

[pgp001]

The 2 bearing motor was used a lot for racing in the 750cc class. Reason for this is that crank ran in roller bearings. Yes they snapped very easily. You can purchase a crank now that has been machined from a billet. Expensive but seems to last a lot longer.

About 1930 Austin changed the crankshaft to a 3 bearing white metal but these were not favoured by the race crowd as it has more friction than the 2 bearing roller crank.

Rob you have done a great job on the head. Next step is to make a twin OHC version. (just kidding)]

The three bearing crank came a bit later than you suggest, mid 30's.

It was not the friction that caused a problem, but the fact that to squeeze the centre bearing in, the designers had to pinch metal from other areas to make space.
The centre bearing was a split shell type, once these start to wear and the crank flexes, then they are even weaker than the two bearing type and breakages were common.
I have a modern two bearing Phoenix crank in mine. it weighs 1½ times what the original Austin one does due to beefed up webs.

Phil

PS Fantastic work on the model engine by the way.

 

[Rob.Barrett]

Here it is with the head on and a pencil for scale.

Rob

 

[Swisswack]

This is art!!!!

 

[stevehuckss396]

Damn that's cool!

 

[canadianhorsepower]

Wow thats some nice work. at this size and beside a pencil
are you building a gas powered pencil charpenerRof}

 

[dreeves]

All I can say is wow

Dave

 

[capin]

Unbelieveable !!! Truly a class act. Brian

 

[ozzie46]

Truly beautiful work!!!th_confused0052th_confused0052


Ron

 

[Art K]

Hey Rob,
This engine is wonderful, I even sent the link to my boss who is into British cars and has a 32 or 36 MG don't remember what year.
Art

 

[agmachado]

Very nice job!!!

Cheers,

Alexandre

 

[e.picler]

Hello Rob.
I have no words to express my admiration for this work, you are really an artist.
I`m inpressed with the details (date codes PN and son on) I wish to have at least a small percent of yor metal work machining skills.
Just for curiosity. Are you using any CNC help? Did you produced any drawing of this project.

Congratulations!!!!!!!!!!

Edi

 

[vcutajar]

Rob

Words fail me. Inspiring.

Vince

 

[Chummy]

It was suggested you make the Twin Cam engine next - someone's beaten you to it here in England, the complete car, and it makes a fantastic noise when running!!!

 

[Art K]

Rob,

My bosses car is a 31, direct competitor of the Austin 7.

Art

 

[Rob.Barrett]

Just completed the valve gear.

 

[Woodster]

Awesome!!!
That's all there is to say.

 

[pgp001]

Smashing job there Rob.

Will you be including the 1/3 scale oil leak between the block and crankcase as per most full size engines ?;D

Phil