The angle keeper is installed I will give these ideas a try and see how it goes from there.
Thanks
Duane
USS Jimmy Carter SSN 23 1/96
Collapse
X
-
As Steve asks, is the angle-keeper installed? If so the stern plane servo 'chatter' during motor run is an artifact of vibration, not motor 'noise'. Not a problem as this vibration is damped out to a significant degree when the model is in the water. Take the angle-keeper out of the loop and test with the motor running -- no stern plane servo chatter.Leave a comment:
-
I finally have all of the control surfaces working now in the Jimmy Carter. I have noticed that If I have a little throttle that the stern planes start to twitch some. The motor has the proper diodes or what ever they are called for the electronic noise. The stern planes servo is the only one doing the dance the others remain calm. Can it be just the servo has some issues and should I replace it?
DuaneLeave a comment:
-
-
David shows the simple solution to magnets pulling apart.
I did a 3D printed version that did the same thing.Leave a comment:
-
From 1/16" brass rod bend a U-shaped retainer that you slip over the ends of the resin magnet foundations. This will keep the control surface pushrod from dropping away if the magnets are pulled away to a degree where the magnetic attraction is lost.
DavidLeave a comment:
-
Ok here is a little bit more of this build.
After a few days of working at it I was able to get the stern planes in and aligned with each other.
When the stern planes are at full rise the two magnets are separated by 1/32" but they do come back together when the servo moves back. Should I have any concerns for this or is it ok? They stay close together by the attraction of the magnets like they are still trying to get back together.
DuaneLeave a comment:
-
That's why I ask...
https://www.researchgate.net/publica...Mini_Submarine
Also a good read:
https://apps.dtic.mil/sti/pdfs/ADA428039.pdf
The concept of the SSK presented in the paper became the basis of a standard hydrodynamic models (the BB2) of a modern conventional submarine for studies in the open literature. There are number of publications from CDF, wind tunnel and test tank models studies. The MARIN institute in the Netherlands made a 3.8m long model for free running tank tests.Leave a comment:
-
That's why I ask...
https://www.researchgate.net/publica...Mini_Submarine
Also a good read:
https://apps.dtic.mil/sti/pdfs/ADA428039.pdf
DavidLeave a comment:
-
Last edited by DrSchmidt; 05-13-2022, 08:59 AM.Leave a comment:
-
Lately, we've taken to inserting large modules well aft of the sail, which makes it look like the sail is way off. The sail was there first! Then, the modules were designed and inserted. The Block V Virginia Class are going to look that way, too. Kind of like "Baby" boomers!
These observations and hypothesis are my own and not derived from any readings I can remember. I very well could be full of **** on the matter.
DavidLeave a comment:
-
Lately, we've taken to inserting large modules well aft of the sail, which makes it look like the sail is way off. The sail was there first! Then, the modules were designed and inserted. The Block V Virginia Class are going to look that way, too. Kind of like "Baby" boomers!Leave a comment:
-
What is it with us submarines having their sails so far off center to the bow? I once read a paper that said that this is bad with respect to the drag coefficient....Leave a comment:
Leave a comment: