Japanese Class A 1/16

[MFR1964]

Yesterday the second attempt for trimming, added more foam and lead,



Added more foam around the tower, left the same amount at the bow.





No sinking like a brick anymore, pretty good, a bit leaning to the left, but that can be solved by shifting the foam near the tower.



This is the extra amount of lead and foam, the weight of the extra lead is about 200 grams, which i have to place inside, first i want to do that and then play again with the foam.



SD preformed perfectly, no leaks, so back to the cave to glue some lead inside, the total amount will be around 350 gram, i guess two or three times more trimming before the maiden voyage.

Manfred.

[MFR1964]

Finally the heatwave is over, it became that hot inside the cave that my 2K epoxy glue behaved as superglue by setting off like grazy, during the intial trimming i discovered some things which i had to adress first before resuming trimming,


Drilling the ventholes at the keel created this problem for me, the trigger of the lower tubes gets hooked into the venthole during pulling off the frontpart.



Placed some bars inside the ventholes.



A bit crude, but this sub was crude build anyway, giving me two advantages, no big debry can enter and the trigger will slide over the bars without getting stuck into the vent hole.


Did today another job of placing the lead to counteract the weight of the tower, used flat lead and curved it conform the hull, the total weight of the tower is 100 gram, the ballast lead is 150 gram, so it should be enough to counteract the tower.
When trimming is finished i'll spray the lead with some primer to prefent desolving over the years, i drive in partly sweet/salt water which will affect the lead on the long term.

Manfred.

[MFR1964]

Manfred, looks great and I enjoy seeing the methodical steps you take!

Thanks Tom,

Despite i want to run her as soon as possible in the open water i have to keep myself at my checklist, this worked in the past and now, documenting the journey has a advantage, so i can look back how i builded some parts in the past instead of re-inventing the wheel.

Manfred.

[MFR1964]

Beautiful, Manfred. Beautiful!

David

Thanks David, this is the result of both the help of you, Gene and Von, the help with documentation and pictures makes the difference, have to finalise the trimming before i can hit the open water.

Manfred.

[MFR1964]

Great work Manfred !!!

Thanks Yannis, it was a long run but worth it, hope to get some sticktime soon.

Manfred.

[MFR1964]

Drooling allover.......wow that is one hell of a peice of craftmenship.......I wish I could see this in realtime....darn C19.
Grtz,
Bart

Thanks Bart, now i have to wipe off the slime of my boat, wonder if now the paintjob will hold, C19 will end, time enough to build and meet each other.

Manfred.

[trout]

Manfred, looks great and I enjoy seeing the methodical steps you take!

[bassplayer1]

Great work Manfred !!!

[bwi 971]

Drooling allover.......wow that is one hell of a peice of craftmenship.......I wish I could see this in realtime....darn C19.
Grtz,
Bart

[MFR1964]

Finally some progress and one step closer to the madenvoyage,



Builded up the testtank this weekend, filling her up.



The first victim to get the plunge, need to get the frontpart off to reach the power switch.



Without foam,lead and holes at the bottom, took some time to fill her up, wanted to see where i stand, waterline too high, rearpart nicely compensated by all the foam inside.



Testing the thrust of the dual propellor, works like a charm, loads of thrust, David has made this very good scale set of props for this boat, still hate you, rudder will be a issue, much too small to get a responsive turning-rate, have to see what happens in the open water.



Scope and antenna floats are in working order, low tech, but most effective.



Ballasttank full, plenty of overkill, have to play with foam and lead later on.



Resquebouye mechanism works, still have to add the safety wire, but for now i know that it works.



Result after a succesfull Saturday, only minor thing was, the rubber seal of the switch wasn't secured that good, got a few drops inside the SD, did a second pressure test after fixing this, no leaks anymore.
As you can see the Ko Hyoteki can fitt inside a small suitcase once taken apart, the magnets take care for easy build up and maintenance.



Progress on Sunday, drilled the holes with a step drill, these should be enough to get a good result in filling/raising up the boat.



Added some lead and foam to get a idea how she stands, the waterline has to become slightly higher.



All in all not a bad result, i know now i have to work with a bit of lead to counteract the conningtower, and a lot of foam, she sank to the bottom like a brick, luckely i have enough space inside the hull, and by using multiple radial cuts i can reach easely inside.
Have to tinker several evenings to get her tuned in, next step will be testing the torps and finally the maidenvoyage, stay tuned.

Manfred.

[MFR1964]

Reinforced the hook from the resquebuoy and altered the buoy itself with adding some aluminum tubes for easier grip, started on the torpedotubes to get them connected to the SD, pictures



Had to take some things apart to make this happen, the hook works now like intended.



First step into hooking up the tubes to the SD, added a plastick tube to the magnetic connector to get more stability when hooked up.





This how it works, adding the tube gives more stability and the connection will not easely disconnect.



Hooked up to one of the tubes, it takes not that much force to make it move.



The other side works different without the lever and is a straight forward push movement.



For getting the boat under power you need to take off the front part, a easy task with the use of the magnetic connection, for now she is ready and on hold, have to build the testtank in the garden, first want to take the plunge unpainted to see if everything works as intended.

Manfred.

[MFR1964]

Making the connector wasn't that much work, but it's working like intended,



This is the tube which is connected to the schnorkel float.



Here you can see the airline running to the float, still have to fasten it with some brackets to the hull, that can be done later when i know the exact position of the airline.



This is the machined part, used some solid copper rod, drilled it out and made me some grooves inside, those grooves hold the O rings.



This was the endgoal, by pushing in the connector i've got me a solid connection, no tools needed for removing it.


Manfred.

[MFR1964]

Thanks for all your comments guys, it made me and SWMBO laugh, which is a good thing, the bad thing is, people are dying here like flies, each time there are more sick people added to the list, they gave us more restrictions, i must say not that heavy as with Bart, the future will learn if our measures will be effective.

So, that was the serious part, the bright side is, i've corrected some things at the SD.



The SD is now finished and tested, had to replace the receiver and the levelkeeper, added the magnetconnectors and finished up the connections to the rearpart of the sub.



Locked down the diveplanes and the rudders for the next step, cutting the rods the right length.



I did kept some extra length so i could tweek with them.



Taking my measurement for cutting down the rods.



After cutting the rods up it revealed that it did not work as intended, so back to the drawingboard, my second attempt made me use bowdencables, this works like a charm.

Next step will be. starting up the lathe for my schnorkelconnector, and modify my construction for holding down the resquebouy.

Manfred.

[He Who Shall Not Be Named]

They need to make toilet roll snickers. Seems to be what everyone is after at the moment- seems to be priority number one to have something to wipe their arse!

Yeah. I don't get the rush-on-****-paper thing. This is not digestive, its pulmonary. Idiots!

[Subculture]

They need to make toilet roll snickers. Seems to be what everyone is after at the moment- seems to be priority number one to have something to wipe their arse!