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Motors by Ianh Sub-Lieutenant Posted: 17 hours ago
Don't know what happened MOTOR COMPARISON Model Number Caldercraft CEM 900T MFA Torpedo 850 Nominal Voltage 12v 12v Operating Range 6-24v 12v Type Brushed Brushed Current Cons No Load 0.4A 1.9A Current Consumption Max Eff 5A 10,8A Stall Current 20.3A 40A RPM at Nominal Voltage 3000r/min 9778r/min Prop Caldercraft 75mm The Motor I am putting in this Sea Queen is a Torpedo 850. This is due to the Caldercraft motor only manages just above walking pace.
Hi This is being built from the Jotika Sea Queen Kit. The kit is quite comprehensive but I need to check the fittings supplied as some of the look a bit small for a 1:12 Boat. Also decided to change the Motor from the existing Caldercraft to an MFA Torpedo 850 as I believe the Caldercraft Motor only manages walking pace. First thing was to built a building board. I need this to also cope with a VMW 46" RAF Crash Tender.
Hi Doug I am using 3 mtroniks viper marine 15 ESC,s and 3 MFA RE-380-Pole DC Motors all have been tested singularly at low speed and connected to 4mm propeller shafts and 30mm propellers and all went well
I had an MFA Spearfish in the mid 1990s and it was powered by an MFA Marlin or should I say underpowered. The Marlin was a good motor but was not really suitable for fast craft such as a powerboat or fast service launch like an M.T.B. I understand that MFA did an 850 which was for fast scale type models but in the end I put an Irvine 25 I.C in the Spearfish. At the time there was a motor called a Buhler which I think was Swiss . I used one😁 in my Perkassa running on nicads which performed very well. For the Aerokits P.T boat there are a lot of suitable brushless motors around and running on lipos will certainly give you all the speed you want.😁 Boaty
Guys The Jig is finished for Sea Queen, I have designed it in such a way that the 46" RAF Crash Tender that I have as kit from VMAW will use the same jig.. Will be fitting to MFA 850's on this as the original had two props. Built one of these many years ago fitted with a Taplin Twin sold it when I moved to South Africa.Not allowed to run IC Boats at the 2 clubs I belong to My wife must never know how much my hobby costs
Preparing to build a 1/48 scale WW2 Flower Class Corvette, just recieved the hull from Fleetscale excellent quality also purchased from them was the prop shaft, prop, and stuffing box and rudder. The materials and craftsmanship on these are priceless. The motor is a MFA/ combo drills 12v D.C. pt No. 457-RE800 and I plan on using a Viper marine 40 amp Mtroniks speed control perhaps a little overkill.
Hi The 382 was a Fire Float Mk1(40 foot) (No. 90) converted in Feb 1950 to a Seaplane Tender. Max speed 21 knots. The MFA 800's are 5167 rpm( unloaded) @ 12 volts/ 5.3 Amps. Replacing these with 3639-750Kv brushless on 2S Lipo batteries(7.2 volts) would give you 5400 rpm( unloaded). 2S 4000mah 25C Lipo's(one for each motor) weigh 221 grams each. Canabus
The ‘Range Safety Launch’…………. Intro. I am now the owner of this boat. Wooden, good hull lines and hull paint work but needing to be finished. I am told that it looks like it started life as a kit, but has had considerable modification to at least the above deck layout and detail. Advice is that it could be a rather simplified Range Safety Launch, but maybe I can use a little ‘artistic licence’ and just make it look interesting and capable. There are two main reasons for sharing this project. 1. I will undoubtedly need guidance 2. Maybe some of the information will assist others The hull is 44 inches ( 112cm ) long and 14 inches (36cm ) wide, it has two brushed MFA Torpedo 800 motors………. and weighs in currently at 15 lbs 4ozs (6.91 kgs). It is large enough for me to be able to work on reasonably comfortably and apart from the cabin/upper deck areas to be ‘improved’, I aim to introduce sound, lighting, active radar sweep, search light, together with maybe a deck hoist and water /fire monitor appliance. At my age it is difficult to tell the difference between wishful thinking and dementing…… However, the prime aim is to try and achieve at least some of this whilst having the boat usable during the current ‘season’. There is so much knowledge, good will and help available on this site that even before I touched a thing, information came pouring in. If anyone feels like making a contribution then please just ‘pile in’. Have ordered some parts so next time should have something to show. NPJ.