Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[Backerther]

Just an impression about your prop used together with a 540 class powerful (gorgeous..sports tuned?)motor....
It's a bit "mottainai”that means a sense of wasteful for that motor. If I were you, I would have used much strong-pitched
props as seen in the pics below. I just feel yours is better used in a slow-moving model boat/ship.
The boat will possibly go much faster by the sharp-pitched props though the motor possibly should get hotter instead, for which
water-cooled system will do so good a job.!!


Pics are 34mm dia props working so good a job with Mabuchi 540 low cost motors in my PT-109 as seen in my previous video.

[Circlip]

You might like to try the last part you haven't changed Allen, Prop shaft angle. No doubt someone will correct my observation but looking at the bow wave, when boat is going slow, suggests hull is 'digging in'. Bow at front, prop at back and thrust of prop is down. If you look at the racing loonies, prop drive is horizontal and no, you can't do this on yours but if you make the drive line shallower, this is going to lower the motor and drive line angle at coupling. A few simple measurements and a pencil and paper side elevation drawing should show what's achievable Bart chopping plastic to start with.


 Regards  Ian


 Forget the fan, just another current drain.

[Allen A]

Hi Ian ... yes the prop shaft configuration as a whole is a bit of a mess I think ..  pic attached and what you see there is as I got it ... and had I the knowledge then I have gained in the interim I would probably have addressed it sooner, as it is and as I have said, it will be a winter project to try and disassemble all the fibreglass etc. without hopefully damaging the hull and reconfigure to a more realistic angle, as you say it will enable me to lower the motor for one thing and perhaps improve other things too.


Took the No 2 boat for a sail today, works well, no leaks and nice little bit of power, quieter than the No 1 boat too ... usual on and off problem with weeds but that's the canal again, motors did get a little hot but then I remembered I haven't removed the grease in the twin prop shafts on this boat, that and the weeds not helping of course, so a job to do there over the next couple of days, will ultimately try and sell this one I think ?

[Allen A]

In as much as I made a post asking about assigning channels it may be obvious to some that this 'PT Boat' is still all ongoing, that being said however I am I think at the conclusion of this little saga re PT boats ..


The No 1 and No 2 boats were both rescue rebuilds, ie bought as started and with some bits missing, and all the previous posts refer to both of those, but I have since sold the No 2 boat, ... I did manage to remove the deck from the No 1 boat due to the realisation that in places it wasn't sealed and secure, that was a successful refurbish I'm glad to say and that boat is now complete, water sealed and more balanced than before and sails well for all that.


All that being said I have bought a (third) complete unbuilt kit and attempted to put together a more complete and detailed model applying what I  learnt from the other two and also using period taken picture  from the two PT Boat books I have as references.

I fitted the length of trim for want of a better word along both sides of the hull, and as before I added lighting to the searchlight, bow light, mast light and in the cabins as well as nav. lights; Using thin cloth I have attempted to produce canvas covering for the torpedo tubes ends and in a couple of places on the boat, I also managed to get some examples of canvas bags, etc and also fitted a .50 cal near the bow.
One thing I have added that may cause a little bit of critical comment, but is accurate in being taken from a picture, is the star and bar emblem current at the time to the top of the front cabin .. I could have also put a large star on the deck at the bow, something apparently some PT boat captains did due to 'friendly fire' incident whereby some PT boats were sometimes attacked by their own aircraft.

It has a full crew compliment all I hope positioned  in varying working aspects, the pictures I hope telling the story better, It floats on an even keel but has not yet been fully sailed, the 'shakedown cruise' being something I am looking forward to doing.

In as much as this completes my foray into RC model boats, I would like to thank everyone for all the help advice and input I have received since starting here, I have enjoyed, more importantly perhaps though, I have learnt a lot from it all too .. thank you all .

[Backerther]

Allen,
Nice to see you back here again with many pics.   And glad to know that you have continued your own PT boats.!
I am looking forward to your third PT boat build process, mate.!!

[Allen A]

Hi .. thanks, those pics are the third boat, I haven't documented the build, just took it steady, took my time and this is the end result.


I still have the No 1 boat, I  sold the No 2 boat and now just have the two .. pics attached of the two together,  the No 1 boat being to the top and right in first two pics and to the left in the last one .... the thing is having finished them both, I don't know what to do next now ..