multiple motors

Started by teejay
29 replies 36 likes Last activity: 6 years ago
#30

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its impressive,only been on one carrier and that was illustrious,one nice ship
brian
brian
#29

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Just to give you an idea of the size of the Nimitz, here's a photo of the Ark Royal and the Nimitz side by side in Norfolk Virginia in 1978, it's flight deck was at least 1 or 2 decks above ours.

Bill
Liked by jbkiwi and brianupyonder and
#28

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Doug,
I stand humbly corrected. But you are right. Still impressive. I would love to be aboard for trials, just once.
Liked by RNinMunich and Martin555
#26

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Great vid Jonathan👍
But not where my pic came from.
My pic is of Nimitz, CVN68, the vid is of Gerald Ford CVN78, apparently doing similar trials.
Cheers, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by Martin555
#24

multiple motors

How to do a handbrake turn in an aircraft carrier! I wonder if that's in the official manual.

Nerys
When the winds before the rain, soon you may make sail again, but when the rain's before the wind, tops'l sheets and halyards mind
Liked by Martin555 and RNinMunich
#22

multiple motors

Aha! Your filing system is similar to mine Cam👍
Borrowed from Sherlock Holmes; depth of dust equates to date of filing!😁
Yes, I am actually in München, on the east side close to the Ostpark with lake and Biergarten.
Prost! 😉
My humble abode/workshop is down near the bottom left hand corner of referenced Google Maps sat pic.
Viele Grüße, Doug 😎
https://www.google.com/maps/place/Munich/@48.1133425,11.631625,1247m/data=!3m1!1e3!4m5!3m4!1s0x479e75f9a38c5fd9:0x10cb84a7db1987d!8m2!3d48.1351253!4d11.5819805
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by Martin555
#21

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Doug Can't remember offhand will have a shufti through my file system which is exceptionally complex ie any flat surface in house. Are you actually
in München might I ask
Cam
Liked by RNinMunich and Martin555
#20

multiple motors

Makes eminent sense Jonathan👍 Thanks!
Needs must when the devil drives!
Speed was of the essence in such times.
And simplicity of maintenance, commonality!, in the field would also have been a driving influence I guess.
After all, all WE have to do in our models is reverse a couple of wire and change a prop!😁
Cheers, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
#19

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Doug,
I could not agree more with your points. I have repeatedly read that inboard turning twin wheels give better manoeuvring and that outboard provide higher speeds. As for ELCO's ,and I believe Higgins boats as well, I can only suggest that rather than adding an additional gear to one engine, they choose to have interchangeability and reduced weight. My guess is that production rates out weighed any other concerns.
cheers
Jonathan
Liked by RNinMunich
#18

multiple motors

Interesting comment camyaj.
In my researches I have not found such a reference.
Where did you find that?
As far as S-130 is concerned, you are almost right. That is the last survivor and is currently still in Cornwall as far as I know.
"Post-war service
Royal Navy
At the end of the war about 34 E-boats were surrendered to the British. Three boats, S-130 (renamed P5230), S-208 (P5208) and S-212 (P5212) were retained for trials.
"Survivor
There is just one surviving E-boat, identified as S-130. It was built as hull No. 1030 at the Schlichting boatyard in Travemünde, S-130 was commissioned on 21 October 1943 and took an active part in the war, participating in the Exercise Tiger attack and attacks on the D-day invasion fleet.
According to Dutch military historian Maurice Laarman:

In 1945, S-130 was taken as a British war prize (FPB 5030) and put to use in covert operations. Under the guise of the "British Baltic Fishery Protection Service", the British Secret Intelligence Service MI-6 ferried spies and agents into Eastern Europe. Beginning in May 1949, MI-6 used S-208, (Kommandant Hans-Helmut Klose) to insert agents into Lithuania, Latvia, Estonia, and Poland. The operations were very successful and continued under a more permanent organisation based in Hamburg. In 1952, S-130 joined the operation and the mission was enlarged to include signal intelligence (SIGINT) equipment. In 1954/55, S-130 and S-208 were replaced by a new generation of German S-boote.

S-130 was returned to the newly formed Bundesmarine in March 1957, and operated under the number UW 10. Serving initially in the Unterwasserwaffenschule training sailors in underwater weaponry such as mines and torpedoes, she later became a test boat under the name EF 3.[30]

S-130 was on display in Wilhelmshaven, Germany, formerly used as a houseboat.

S-130 was purchased and towed from Wilhelmshaven, Germany, to the Husbands Shipyard, Marchwood, Southampton, England in January 2003, under the auspices of the British Military Powerboat Trust. In 2004, S-130 was taken to the slipway at Hythe, where, under the supervision of the BMPT, she was prepared and then towed to Mashfords yard in Cremyll, Cornwall, England to await funding for restoration. In 2008, S-130, having been purchased by "Wheatcroft Collection", set up ashore at Southdown in Cornwall to undergo restoration work involving Roving Commissions Ltd. As of June 2012, this work continues and includes an S130 Members' Club. "

If you have any newer info I'd be pleased to hear it.
Somewhere in my archive I have some pics of an S Boat / E Boat in a rather dilapidated state, showing the framework. Might have been the 130?
The more I find and save the longer it takes me to find it again!!🙄
Cheers, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
#17

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Hi Jonathan,
" ELCO pt's props all rotated the same direction."
Yes I did know that, and it still puzzles me why they did that!
For decades it has been standard practise to use contra-rotating props to minimise the torque effect of powerful engines in relatively small hulls.
The jury is still out though on the question of whether two props should rotate outboard or inboard! The number of and position of the rudder/rudders in relation to the shafts apparently has an effect here; i.e. twin rudders concentric with or inboard / outboard of the shafts?
Real size twin shaft FPBs and FACs designs I've worked on went for inboard rotation and twin rudders mounted slightly inboard of the shafts!
Yer pays yer money an' yer takes yer choice Jonathan!
The jury is also still out as to whether this really matters in models.
My personal opinion and experience;-
Given the ludicrous power to weight ratios now available to we modellers, ratios that real shipbuilders could not dream of nuclear powered or not, I believe that torque cancelling is even more important in fast model boats.
Watch your model closely on the sea trials!
Does it dig in more on a fast turn to port or starboard?
And which way was/were your prop/props rotating?

All I know is; a few decades ago I was sailing my 1/72 destroyer in the lake in the Ostpark here in Munich, and an ex RN Captain came up to me.
We started chatting, and became friends and fellow modellers.
He had watched the performance of my destroyer, HMS Hotspur - scaled up from a 1:600 Airfix kit!
His immediate comment was "if I were you I would reverse the props to both rotate inwards. That would give you much better rudder control and a tighter turning circle on a single rudder". I did and it did!
I now follow that rule on all my multi-shaft models.
Cheers, Doug 😎
BTW: Attached is my favourite photo of when the Captain of USS Nimitz wanted to go water skiing!😁 Now THAT'S multi-shaft manoeuvrability - with 90000 tons!!😮
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by Inkoust and billmcl61 and
#16

multiple motors

Irony being the original was designed as a launch for a German business man who also happened to be Jewish.There was an original S130 I think, down in Devon being rebuilt don't know if it still is.
#15

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"built for RAF buy a German boat yard using the same design and technique's as the German S boats"
That would have been the Lürssen yard TJ.
During WW2 they designed and built the S-Boote, Schnellboote, with the 'Lürssen effect' hull and rudder arrangement design which gave them more speed for the same power plant as conventional hulls and superb manoeuvrability. Part of the secret was the rudder arrangement which actually added to the speed!
In the late 80s and the nineties I had the pleasure of surveying, for a COMMS refit, some Lürssen T-45 (45m) class Fast Attack Boats of the Ecuadorian Navy in Guayaquil harbour. The T-45s were a later, upgraded, descendant of the S boat hull designs. Very sleek, fast!

Somewhere deep in my archive I have a photo of me, sneaked by a colleague🙄, prancing about on the stern of a T45 looking for somewhere to mount an HF RX antenna well away from the TX antennas! Happy days!

Bill: Re "I'm surprised we didn't capitalise on having this design in our hands during the war,"
We didn't have those designs during the big shindig I'm afraid!
The D boats were built in the 50s, shortly after Lürssen, or any other German yard, was permitted by the British administrators to resume production.
Naturally they used what they knew and what they knew worked! The S-Boot hulls!
The Lürssen yard still exists. In the 70s and 80s they also built a quite successful frigate series, especially for South American navies, with a very high forecastle, somewhat reminiscent of the Leander class but much shorter.
Lürssen is are now part of the German Shipyards Consortium. As such they have been involved in various new ship projects for the Federal German Navy. The building of the new frigate classes being divided amongst the remaining yards. In stark contrast to the UK government handling of a similar situation which resulted in the demise of most of our skilled yards.🤔 What's left is now amalgamated into BAE Systems, Surface Ships.
Over about 10 years or so I often had the pleasure of working with Lürssen Logistics GmbH and associated navies on maintenance and upgrade projects for such vessels.
That's how I ended up in Ecuador, another reason being the HDW T-209 submarine upgrades.
Not a survey project I can recommend for 6'2" guys like me, not without a hard hart anyway🤕
Cheers, Doug 😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
#14

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Hi all thanks for the interest, I have posted more detail in previous post about two years ago . long to short ,the RAF commissioned the d Boats from Lurssen ship yard in Germany in the early 50s as part of the occupation the forces they had to use local contractors where possible to help the economy of Germany recover from the war, So five boats where ordered using a design based on the Schnellboots of WW2 , these boats were attached to RAF Silt near the denmark and sailed from two local ports, the boats entered service in about 1954. The crews which were part RAF air sea rescue personnel and part civilian and they took to calling them Eboats, so the RAF higher ranks took umbrage at that and officially named them D Boats,! the crew in true service manner continued to refer to them as E Boats, they served with the RAF for 5 or 6 years then transferred to the German air force and were use for SAR duty. at sum point they were sold , two went to the south african airforce which were sunk, the rest were sold into private hands one as a north support ship which was sold on to a italian interest of which I can find No trace. the other two ended up in the hand of the spanish custom authorities and used as patrol boats,after they captured while being used for smuggling, I have tried to contact the spanish custom authorities to try an find out the fate of these two boats but have never a reply,

regards Tj
#12

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Hi TJ,

This sounds very interesting, do you have any more info on these D boats, I'm surprised we didn't capitalise on having this design in our hands during the war,

Bill
#11

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that s correct I am using this as precursor to building a 1-24 scale D boat (D 2763)of the RAF marine craft section which my father served in 1955, these boats where built for RAF buy a German boat yard using the same design and technique's as the German S boats

regards TJ
Liked by RNinMunich and billmcl61 and
#10

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the Italeri one I presume I also have that one that one at 1/35 the D boat wont be much bigger than the your S boot
#9

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the S boat is 1-35 and is the first rc project that i have done and is in-prep; for a RAF D Boat 2763-4 in 1-24 scale for which i am in the process of making a block pattern for a fiber glass mold
#8

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Hi what scale your s-boot mine is 1/24 used to run on 3 mfa 850's came down to 1 brushed motor and 1 prop now as fast or faster. the Weight and current draw of 3 negated the power
#7

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RNinMunich,
I am pretty sure you know this and have a reason for doing so, but ELCO pt's props all rotated the same direction. I can certainly understand why one would counter rotate the outboard screws though.
Jonathan
Liked by RNinMunich and Martin555
#5

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Rick,
Assuming you are not referring to the type you smoke LOL!!!!

Martin555.
If it looks right it probably is.
#3

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Thank you It good to be back ,and thanks for the reply , sounds good I will give it a try, and I have learned the lesson about the rubbish only it was pond weed , I did not expect it in such a new lake!🤣
Liked by Martin555
#2

multiple motors

Hi TJ, Welcome back😊
First off: You can ONLY do that with brushed motors!!!
Brushless ESCs rely on position info from the brushless motor, i.e. position of the rotor at any moment, to correctly control them, i.e. energise the correct next coil at the right time.

To connect 3 brushed motors to one ESC is easy. Just connect them in parallel!😁
On my twin engine destroyer I used a chocolate block screw connector for simplicity and easy maintenance.
For a triple set up, which I hope to do on my ELCO PTB, I would connect the centre and starboard motor to run clockwise (seen from astern) and the port motor to run anticlockwise.
Just reverse the leads to the port motor.

A MUST!! Check that your ESC is capable of handling the total maximum loaded current of all three motors. And fit appropriate fuses in one lead to each motor in case one gets clogged by leaves or other rubbish. A growing danger is plastic bags☹️😠

Looking forward to reports and pics of your progress👍😊
I have two S / E boat kits in my stash too.
Hope this helps, Cheers Doug😎
Young at heart 😉 Slightly older in other places.😊 Cheers Doug
Liked by Inkoust and Martin555
#1

multiple motors

Hi long time no see , can any one tell me how to rig 3 motors to one esc, back working on S boat had in the water one one motor worked and the boat was very slow .I would like to try and connect all three motors one esc before spending cash .
Liked by Martin555

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