I had similar problems when fixing bulk-heads. Later I found a solution by constructing the basic frame on a 18 mm Flat plyboard. First I fix the keel with wooden boots & fixtures (keel holder) then each bulkhead. While positioning each bulkheads with sheer I use outside Caliper. This is very essential tool while fixing bulkhead at the right position.

hi mate.
your boat has a stepped deck and only one step up in the keel line.........
mine has a flat deck and two step ups in the keel line..........
different plans??
looks good though.
thats why I built mine 'upside down' as it had a flat deck and there fore all should have lined up well ..but....not to be eh?
regards
don

This hull is not as simple as it looks. I did notice the stepped hull, and two piece keels (parting for stuffing tube), just thought right side up would have been better.

hi mate.
it's only the 'flat decks' I used to do upside down as then I can build 'on the plan' and get the perfect deck line.
 other wise yes, keel blocks does build better. and guarantees a perfect keel line.
looking good. mine is still only that far.
regards
don

hi people.
I have started the first 'skin section' I am using heavy weight card.....about double the thickness of xmas cards as I have quite a pile of this.

It will be filled later as normal and then a few layers of tissue and either dope or spray varnish......which ever is cheaper.......... before the paint coats.
the inside will be spray varnished to safe-guard it from water damage.
regards don

hi guys.
well a step further with the build.
now first skin is complete...leaving it for a few days indoors to ensure it is perfectly dried out then spray varnish the inside and then I can fill the outside...mainly the bow as the ribs are a little prominent .... then skin and seal it.




regards
don

Watching and learning!

hi guys.
well the card I used to skin the hull measures 0.7mm.....for future ref.  
thats  0.027 559 055 118 inch for those not using metric.
going to have to order a 13 1/2 or 14in prop shaft....looking at fast revving racing props..........any other  ideas?

regards
don

edit.....
 I have ordered a 12in shaft .with the coupler that should be long enough..... ..hope fully  
I have cut a 'base deck' from the same card so when I sheet and dope it I can go right up over the base deck to the gunnel's where the superstructure will sit and hopefully have a water tight seal with decks and hull...........
on ward to the superstructure now......while I wait for the varnish for inside and then set the shaft and motor and put in the shelf for the electrics.........it will be brush less motor.

hi guys.
Well I have cut a base deck and installed the gunnel's....this is just placed on for now.........
. as I have to install the prop shaft when that arrives and sort the motor mount, electric shelf, etc before fixing and then the waterproof skin.

I have started on the superstructure............this is all in card stock...........must keep this cheap.  
I am thinking this may need some serious ballast..........the original plans were for a gas motor..........may be a 'gell cell' to run it on...I just happen to have 2 12v laying around here
regards
don

Hi guys.
Well I have made a start on the superstructure now.
here it is to date...just placed on for now.
 the complete unit will be a lift off hatch for access to the hull.

now to make the twin boffors..............          
regards
don

hi guys.
well still working on deck fittings.
here is an update of progress......... the torpedoes are about half done. the gun stood on the stern looks a little 'large' now it's there [still to put the rifles on...]
start on the depth charge stern rack next......and of coarse the 'engine room' and fore cabin' deck hatches to do yet.......

still waiting for motor connector, but have installed the prop shaft and found a suitable rudder........ [old 400 size heli fly bar paddle ].........
the deck is taped in place at the moment to keep it flat. it is two layers of the card which will all be enclosed in fiber glass in due coarse.......after I have done the bit of filling at the lower bow region..........
regards
don

The boat is shaping up nicely. 
If possible please post one more picture of the hull, “bottom view”. Just want to see the step hull after covering.

hi mate.
here are the pic's of boat bottom


showing 8mm stuffing tube
regards
don

YEEEAAAHHAAAAA.....oh my god...Sir its a nice build...i am too happy to see like this one...waiting for the finished machine...Sir, its truely inspiring and i hope i will make one..soon..the machine simply looks awesome...have a nice build...

hi guys
well it is slowly coming along.
still making deck fittings....hatches etc and waiting for mooring fittings........bollards and fairleads.

I need to get the fiber glass next so another possible delay
regards
don

Sir..please follow and complete thw work Sir..it will be an awesome craft...good luck

hi guys.
yes it will be completed ................. may be a little slow but it will be done

regards
don

Sun Sir..bottom side this specific craft is stepped towards Stearn...what is actual purpose of these stepping...? will you guide me once... please..?

hi mate.
it was an early attempt to help it go faster............. these were designed in the 1930's...........
this system is used on water planes to help then 'break away' from the water surface on take off.
regards
don

Sunk Sir..million thanks for the know how...and happily i started the work of the same craft...she is 2.5 feet long..in scale...and willing to power her with a home made brushless....

Hi mate,
I look forward to the build log..and a few pics.
regards
don

Hi guys.
well here is an update pic of the 'MAS'

Railings just placed on for now....deck needs finishing first,
Torpedoed still to have a nose cone fitted...........ordered some 22mm beads to glue onto the nose for the cone.........
still have a hatch to put on the stern in front of the gun and the depth charge rack to make,
 also a hatch for the 'fore deck' and make the anchor.
regards
don

Sir..nice...

hi guys.
well a little more progress.....
filling the bow to shape and a fillet on the stuffing tube keel.


also I have the nose on the torpedoes now and done the depth charge rack for the stern.
more picks after I do the final sand on the filler ,
then its all set to do the fiber glass skin.............I layer of fiber glass tissue and then paint.
regards
don

hi guys.
here is the latest pics.
filler sanded.

bow shot with lift off deck section in place

hahaha......I've used colored beads for the torpedo nose 
regards
don