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>> Home > Tags > twin rudder

twin rudder
rudder
rudder mount
twin motor
twin rudder
HMS BRAVE BORDERER by jbkiwi Commander   Posted: 20 days ago
Rowen, here are a couple of things that may be of use to you (and others). The battery alarm will save you worrying about running out of steam as they can be set to beep at varying voltages to warn you of low battery, just put one on each batt balance lead and when one goes off (when an individual cell drops below the set voltage) it means start heading back. These can be picked up on Ebay for a few dollars. I use them on my planes as well and are audable from around 100m (these twin horns are the best) Secondly, re your ESC switches, these electronic switches (AliExpress) are great for this sort of thing (as long as you have enough aux switches on TX ) You can link them with a Y cable to work together or use them independantly for anything, (lights, pumps etc, - they can be operated by TX rotary switches as well) The ESC and 2000kv motor (HK) are the ones I am using in my ASR model and will work smoothly down to a crawl, the purple 1980 kv seems to have superseded these but I think they will be as good. The props are from Ali Express and are resin and available in L and R hand, are only a few bucks and perform perfectly while looking quite scale(ish). I painted them with an acrylic bronze which seems to have stayed on pretty well. Model weighs 2.8kg and will run at more than 10mph flat out with this set-up (using the 26mm L+R) props) which is silly speed and that's with 2x 2s 2200mah lipos (which will last till you get sick of it and still have 60% left) I was just looking at your Daman set-up and noticed the wiring method from the batts to the ESCs. You might want to make your batt to ESC connections direct to your ESCs (as per original ESC lead length)as your capacitors may get a thrashing (spikes) due to the extra length/ resistance you have there. There is a general rule that you don't lengthen the batt to ESC wiring without adding a 220mf capacitor of same voltage as the ESC for every 4"of extra wire length (ESC to motor - not so much). Might want to check this out in case you fry your ESCs You probably have thought of this but thought I'd mention it, 'just in case' Might help with your modulation as well. Have chucked in a vid of the HSL manouvering (first trials so wasn't perfect) and also the MTB (brushed) which I have just converted to a twin system (was twin but single Electronize unit) plus a sound unit. You may know that you can use as many RECs (bound to the same TX) for various purposes on the same boat (have run 2 boats together from the same TX) Might get you round the mixed brushless/ brushed problem with a bit of thought. Have you thought of changing your old HK silver 6DF TX to twin throttles, it's a piece of cake(as is the TGY 6x), just remove the aileron/rudder centering spring and make a friction plate as per throttle stick, and use the elevator channel as your other throttle. Set your ESCs and you can then use a twin system giving you perfect control. Saves a lot of hassle.

A577 by colindavies Sub-Lieutenant   Posted: 26 days ago
[Score: 5/10] 20"/700g A577 - Comments: This model belongs to a friend of mine who had this in his attic where it got damaged and its condition deteriorated, he asked me if I would refurbish it. This is a static model and I have submitted this to help to show the variety of craft that the RAF Marine Branch operated in the 68 years of its existence. The Armoured Target Boat was the brainchild of the Air Ministry's "I've had a good idea" Department. The requirement was for a target boat that could be bombed from the air with practice bombs. The 40ft Armoured Target Boats were developed from the slightly smaller 37.5ft ATBs which had been designed by Scott-Paine and others at British Power Boat in 1932. A couple of years later, in 1934, whilst bringing the first of the 64ft HSLs into service, it was realised by the Air Ministry that the condition of the aircraft had been advancing and that it was necessary to provide additional protection to improve the first type of Armoured Target Boats (the 37.5ft type). T.E. Shaw suggested to Scott-Paine that he should increase the length of the 37.5ft type to 40ft and fit twin rudders. In addition the Air Ministry prepared a new armour plating arrangement which gave separate protection for the crew and engines and coxswain. There was a further alteration to the forward bulkhead which resulted in it being changed to vertical instead of raked fore and aft to overcome the new conditions for bombing. A long series of trials were carried out with the ballast with the 40ft type launch and eventually it was approved. The 40ft thus became the standard type Armoured Target Boat (ATB). The first batch of 15 craft of the 40ft type were ordered in 1935 with further batches being ordered in 1936, 1937 and 1938. A further addition was the introduction of a 3rd engine, this helped to maintain a good speed on the ranges, and helped to counterbalance the the boat as it had been found that in a tight turn the 37.5ft ATB had a tendency to roll over.

BRAVE BORDERER - BRUSHLESS SUMMARY by jbkiwi Commander   Posted: 1 month ago
The only thing you might have to watch out for is back feed from the pump out the aux tube (when moving) if you don't set up the y joints (must be y not T ) to create a venturi effect from the pump side. Doesn't matter standing still but at speed a T junction might reduce the flow as the flows will be fighting each other slightly. The beauty of the twin system is that if you are running a lot at high speed you could turn the pump off to save power. The best place to position water intakes is I have found is directly behind the prop (I usually just squash the brass tube slightly, fair it, cut it off at 45 deg and set it to just sit in the prop wash). At lower speeds especially, the prop will help to push water into the tubes rather than just relying on speed alone. Never had a problem with pickups interfering with rudder effectiveness as long as you fair the pickups nicely

Must get the skins on before I pull all of my hair out!! by RNinMunich Fleet Admiral!   Posted: 1 month ago
Hi Pete, Basically yes. There are some other tricks with twin screws, not least engine assistance using a twin ESC with rudder mixer. Also the screw rotation makes a slight difference, and the rudders are usually slightly offset from the shafts, depending on the screw rotation. Are yours turning outwards or inwards? Referred to the top of the screw looking from aft while going forward. Cheers, Doug

Must get the skins on before I pull all of my hair out!! by MouldBuilder Admiral   Posted: 1 month ago
Thanks Doug. Does this apply to twin rudders also. Thanks.😊

Must get the skins on before I pull all of my hair out!! by MouldBuilder Admiral   Posted: 1 month ago
Is there a correct angle, plus and minus of centre, that a rudder should move. If there is a norm, is this the same for twin rudders or is there a different set of rules.🤓 Thanks.😊

Friday's Child Fairey Huntsman 31 by CB90 Fleet Admiral!   Posted: 2 months ago
They are a great looking craft, I am restoring one myself, please be aware that red paint may contain lead, so wear a mask while sanding. My restoration is of a old Fibre glass hull I intend to install twin rudders and motor shafts and go brushless, I am building the superstructure from scratch with some help from old plans. I want to have a swordsman type cabin.

Cygnus Revenge 38 by Bucaneer16 Chief Petty Officer   Posted: 2 months ago
[Score: 8/10] 38"/6000g Cygnus Revenge 38 Capable of 5mph and a runtime of 25mins Twin Propellors (3 Blade 35mm) Direct Drive to a 800 (3 Blade) Powered by NiMH (12v) 5Amp/h Batteries Controlled Through Mtroniks 40 x2 (15Amps) ESC - Comments: Models by design Cygnus Revenge 38. Made strong to tow lures. Twin screw, twin esc, twin rudder. Nice speed on the water, not excessive! and very stable in chop.

BRAVE BORDERER by jbkiwi Commander   Posted: 3 months ago
Starting a bit backwards here as have posted more recently with some ideas. If you are going to have a twin brushless system using 1 REC, you probably should have twin 2200Mah 2s lipos, a power lead (I use a JST plug set) taken from the input leads of ONE ESC (not the batt leads) (I break into them and solder the JST leads on ) run those to a UBEC and then to your REC switch then to your receiver. If your ESCs have a built in BEC, withdraw the red power wires from the BEC receiver plugs and tape them back as you now don't need the power from these. If your TX is 2 stick 4/6ch etc and is capable of being changed to 2 throttle sticks (provision for ratchet strip - copy if necessary - on opposite gimbal - ie using set up as mode 1&2 throttle) you can use the existing throttle and elevator stick to give full independent control with either rudder or aileron Ch for rudder. The Chinese ESCs I use have a power switch as well as BECs which is handy. I would keep the brushed system separate from the brushless altogether with its own battery (or try power from the other batt as described above) otherwise you may be trying to mix 3 phase and single phase at some point. If you are using 2.4 you could use another paired 3ch receiver (does work, as mentioned in my later post) to only run the brushless throttle from a rotary sw on your TX (if you have that )

three model live steam boats for sale by terry1956 Seaman   Posted: 4 months ago
Only the open deck boat for sale now, fitted with a Wilesco d46 boiler and twin cylinder engine. Servos for speed and rudder. This boat runs on gas from a small gas cylinder which gives around 15 to 20 mins running. Looking for £170 collection only. Some people have asked about a boiler test and I have looked into this as I will never understand why it needs one, 19psi, there is more pressure in a coke can. Anyway to get a test it needs a pressure test. Or just buy a new boiler off eBay for £55 pounds. This is collection only from Yeovil

Range Safety Launch? by RNinMunich Fleet Admiral!   Posted: 4 months ago
I agree Donnie, I did just that (turning inwards seen from behind for moving ahead) on my twin screw single rudder destroyer. It made it much more responsive to the helm😉 Same with my long thin U26 Type 1A U-Boat. I am making the same changes to my Belfast cruiser, 4 screws, and the Graf Spee, twin screw. Both with single rudder. On my twin screw / twin rudder PTB they turn outwards. Cheers, Doug 😎

Battleship Missouri by Mikep Commander   Posted: 4 months ago
[Score: 5/10] 55" Battleship Missouri Capable of 4mph and a runtime of 20mins Twin Propellors (4 Blade 35mm) Geared to a 6 volt (4 Blade) Powered by NiCad (6v) 3Amp/h Batteries Controlled Through Hitech ESC - Comments: Modified Sterling model kit, scale drive 4 shafts. Twin rudders, smoke and cannon sound module.

RE ads90's Vosper Firefloat by RNinMunich Fleet Admiral!   Posted: 5 months ago
Hi Neil, Looks like a somewhat simplified Range Safety Launch to me, the 43ft version from 1955 - , but the number is dead wrong. http://www.rafboats.co.uk/rsl43.html Scale between around 11 - 12 to 1. LoA - 11.7 Beam - 11.1! Twin props should ALWAYS turn in opposite directions to counteract the so called prop walk which otherwise shifts the stern sideways in the direction the props are turning - seen from behind when the boat is moving forward. the jury is still out on whether they should turn outwards or inwards; with respect to the top of the prop when going forwards and seen from behind. Separate motor control (so called 'Tank Steering') is great for slow speed manoeuvrability and very sharp turns at speed (to be used with caution!), but is not easy and needs a lot of practice! A twin ESC / Rudder Mixer is easier😉 For scale; 3 blade props. Suggest you start a new thread for this. Ciao, Doug 😎

What do you do when... by Steve-Teresa Sub-Lieutenant   Posted: 6 months ago
Its possible we have all had this issue.. boat in the middle of the pond not working, I used one of the other boats I have to retrieve it, not very easy.. I am thinking of building a rescue vessel, square(ish) front, twin prop's and rudders tucked out the way for reversing and with soft rubber edging all around it to push or even guide (if damaged rudder) any boat back to shore.. or is this going a bit far?.. your thoughts or what you do when or if this happens when your out on the pond?

Warped wood by RNinMunich Fleet Admiral!   Posted: 6 months ago
Hi John, yep, as mentioned above I know them and have some of their modules. Sonar sound (pinger) for my destroyer, twin ESC with rudder mixer, will probably also go in the destroyer. With a 12:1 LoA to beam ratio she needs all the help she can get for a sharp turn 😉 Delivered pronto to Munich as well 😊 Well made and highly recommendable 👍 Their documentation is also superb, 5 stars! Phew, just finished stripping the PTB hull, now I've got two hulls to sand, seal, strengthen and paint! All go folks 😁 Cheers all, Doug 😎