Woodstock74 Posted June 9, 2020 Share Posted June 9, 2020 I need a dimension, if anyone can indulge me who has the Micro-Mir kit. I simply need the hull trailing edge diameter, where the screw meets the hull. So either the diameter of the hull, or the diameter of the screw boss. It's more accurate taking it off the screw boss if you're using a pair of calipers, though the part is fiddly as it's small. Link to comment Share on other sites More sharing options...
Woodstock74 Posted June 24, 2020 Author Share Posted June 24, 2020 (edited) Some WIP... Edited June 25, 2020 by Woodstock74 Added image 1 Link to comment Share on other sites More sharing options...
Woodstock74 Posted July 1, 2020 Author Share Posted July 1, 2020 Very much chicken before the egg...kit only just arrived yesterday...I'll need to assemble the two hull halves together and then do more verification work on the interface between the screw boss and the hull trailing edge. And then I'll get distracted by something else, squirrel!...did find images of the Trafalgar's screw today, so there's that... 1 1 Link to comment Share on other sites More sharing options...
whitestar12chris Posted July 1, 2020 Share Posted July 1, 2020 Hi Woodstock just caught this, have a pic of the propeller in question hope it helps. All the best Chris 1 Link to comment Share on other sites More sharing options...
Woodstock74 Posted July 1, 2020 Author Share Posted July 1, 2020 2 hours ago, whitestar12chris said: Hi Woodstock just caught this, have a pic of the propeller in question hope it helps. All the best Chris Thanks for that Chris. Different angle, 90% of the photos online are taken to the right of yours, square to the signage. And your new angle brings the question...do we think those are zinc anti-corrosion anodes there between the blades? And if so, they aren't placed between every blade as on the Russian subs as this is the only image I've seen showing any evidence of those. 1 Link to comment Share on other sites More sharing options...
foeth Posted July 1, 2020 Share Posted July 1, 2020 (edited) Not entirely sure if these are sacrificial anodes, as these you typically place near the weaker material and that is usually not the propeller (brass is usually the cause of the problem). Probably a few holes to apply the hydraulics when fitting the prop on a shaft, see below. Edited July 1, 2020 by foeth 2 Link to comment Share on other sites More sharing options...
whitestar12chris Posted July 1, 2020 Share Posted July 1, 2020 Woodstock, have done a google photo search and its clear this is the only position, these are found on the propeller. Even did a bing maps birds eye view. All the best Chris 1 Link to comment Share on other sites More sharing options...
Woodstock74 Posted July 1, 2020 Author Share Posted July 1, 2020 46 minutes ago, foeth said: Not entirely sure if these are sacrificial anodes, as these you typically place near the weaker material and that is usually not the propeller (brass is usually the cause of the problem). Probably a few holes to apply the hydraulics when fitting the prop on a shaft, see below. Primary reason brought up anodes is because it seems a common practice with the Russians. Or, that's what I assume those objects are between the blades on their Kilo and Delta IVs, etc. I had thought they could also be some kind of flow energizer for hydrodynamic reasoning, but they also look zinc in nature, so perhaps double duty? 3 Link to comment Share on other sites More sharing options...
foeth Posted July 1, 2020 Share Posted July 1, 2020 (edited) Thanks, I see your point! Hydrodynamically they are... in the way... I guess they did their research and that there is no cavitation hindrance from the anodes? And that hub cap is also a form of vortex diffusor. Edited July 1, 2020 by foeth 1 Link to comment Share on other sites More sharing options...
Woodstock74 Posted July 1, 2020 Author Share Posted July 1, 2020 1 hour ago, foeth said: Thanks, I see your point! Hydrodynamically they are... in the way... I guess they did their research and that there is no cavitation hindrance from the anodes? And that hub cap is also a form of vortex diffusor. Yes, the Russians have a couple of flavors of vortex diffusers, though they seem to like the simple cruciform version the best. Link to comment Share on other sites More sharing options...
Woodstock74 Posted July 5, 2020 Author Share Posted July 5, 2020 3 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now