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>> Home > Tags > cad

paddle tug Aid by marky Admiral   Posted: 2 hours ago
my wife got the book online from a company called Abe's books i think they had 3 or 4in stock ,it does have fore and aft rudders and is very symmetrical looking ,Aid was built in 1889 and worked out of Ramsgate ,I have only built static models before (3)so will build the hull and decide from there, I am attempting to draw the wheels using CAD and will hopefully get them water jet cut or photo etched at my work

MFA TORPEDO 500 / BATTERY INFO by RNinMunich Fleet Admiral!   Posted: 4 days ago
Hi al, jarvo's answer is more or less correct but not the whole story! Here is a reprint from my attempt to clarify various misunderstandings and misuse of terms related to batteries - usage and maintenance - posted to a thread "battery charging" you can find under 'General Sailing'. "Hi Both (and all other non-technical guys here!) (Dave_M please jump to the next post or topic!😉) To avoid further confusion amongst the non-technical members can we perhaps straighten out the technical terms involved in battery charging and use (strictly speaking the dimensions or quantities involved). mAh (milli-amphour) is a measure of the capacity of a battery: how many 1/1000 of an ampere (A) it can theoretically deliver in one hour, if in perfect fully charged condition and under perfect environmental conditions. (What you ain't never gonna get!) When the outside temperature drops so does the usable capacity 🤔 Charge and discharge rates are measured in ampere (A). under 1A the milliamp (1A/1000, unit mA) is usually used for convenience. Quality battery packs are marked on the case with maximum charge and discharge rates in A. Sometimes marked as xC/yC. xC is the MAX charge rate and means x times the nominal capacity/1000. yC is the MAX discharge rate (i.e. what your motors take) and often means y times the nominal capacity/1000. Sometimes the max discharge rate is given as a multiple of the max charge rate. See example in my photo. These are MAXIMUM warnings and NOT to be taken as the norm! See example in pic. Capacity 4000mAh = 4Ah, MAX charging current is 8A =2C, (4000/1000)x2. Half an hour charging gives then 8/2=4Ah. I would never ever charge at anywhere near this rate! Charging at 500mA (0.5A) for 8 hours (0.5Ax8h=4Ah) is perfectly adequate and much more gentle on the cells i.e. longer life 😉 MAX discharge current is given as 240A = 30 times max charge current or 60 times capacity in Ah.(4). If I used it at this rate it would probably be irreparably damaged (toasted) in just under a minute (0.9999r) 😡 If any Lixx pack gets HOT while charging or in use take it to recycling pronto, before it sets fire to your boat or workshop/house😡 ALWAYS MAKE CERTAIN THAT YOUR CHARGER IS SET FOR THE TYPE OF PACK YOU ARE USING, NicAD, NiMh, LiPo OR LiION etc (don't forget the balancer connection!). Sorry for teaching some 'grandmas' to suck eggs but having seen so many questions about battery charging and much misuse of the parameter units for batteries in the responses (as above) I felt it was time to clarify things for the non-technical among us, for their own safety and the health of their wallets!" Cheers Doug 😎

First test run by Novagsi0 Lieutenant   Posted: 6 days ago
Decided to try it out Sunday, no major problems need a bit more weight in the back. Good turn of speed even with old recycled ni-cads from a drill pack. will be looking to get a lipo pack in the new year but pleased.

Sea Commander Ocean yacht by Trillium Commander   Posted: 9 days ago
Garth, no doubt that Graupner make excellent products but CAD$35 + shipping is a stretch. Especially when you can make up a double universal for CAD$10 with two of these. I've been using these for several years now. Roy

Sea Cadet by lesliebreame Commander   Posted: 13 days ago
We had a brilliant though exhausting day at Winterbourne house and gardens on Saturday with lots of steaming and BBQ bacon!! Here is a superb Marten Howes Balis in aluminium owned by John Esher.

3d printing by SelwynWilliams Lieutenant   Posted: 17 days ago
These are the ship's plans I have and would want to have put into CAD and then output to a 3D printer is it feasible?

3d printing by SelwynWilliams Lieutenant   Posted: 20 days ago
Hi Wayne, the guy made models for films but thanks for the advice. I will chat to my mates about the lines to go onto CAD.

3d printing by Midlife306 Fleet Admiral!   Posted: 21 days ago
Hi Selwyn, when the guy quoted you £7k was he wearing a mask? It shouldn't take very long at all for someone who knows their way around CAD to convert a line drg to a model. Get the model as a .STL file & away you go👍 I'll post more pics later Marky, it won't be flying anywhere though, I plan to make a launch trailer for it though🤓 Cheers Wayne

3d printing by SelwynWilliams Lieutenant   Posted: 21 days ago
Hi Midlife (Wayne?) I know a CAD expert so I will ask how long that might take. I was looking for the easiest option. We were quoted £7k by a professional builder. The plans we have relate to Bristol ship lost off Chesil Beach.

3d printing by Midlife306 Fleet Admiral!   Posted: 21 days ago
Hi Selwyn, you would need to draw them up in CAD first, then you can make it any size you want👍 The tail section is finished & im alive to tell the tail lol

3d printing by Midlife306 Fleet Admiral!   Posted: 21 days ago
Hi Selwyn, you would need to draw them up in CAD first, then you can make it any size you want👍 The tail section is finished & im alive to tell the tail lol

FRESH BATTERY RUNNING TIME by RNinMunich Fleet Admiral!   Posted: 26 days ago
Hi Les, Sorry🤔 but this is another "How long is a piece of string?" question. It's a simple equation to work out the theoretical endurance, but no input = no output! Inputs required are- Battery type and nominal capacity; mAh as printed on the battery pack, Current drawn by all the electrics connected to it: RX, servos, sail winches etc, auxiliary motor if fitted. I'll leave that bit to the sailing buffs here. I have zilch yachting experience. Re: depletion: Battery should not be left connected when not in use! You should have an ON/OFF switch in the boat to disconnect it. If not in use for longer periods it should be removed from the boat and periodically charged, only to 50% capacity for a LiPo when stored. stored NiCads and NiMh should be periodically cycled; that means discharging to the safe minimum and then recharging SLOWLY. Good chargers have automatic programs for this. Depletion, even when not connected to anything, depends on the battery type. A NiCad looses approx. 1% per month, NiMh and LiPos considerably less but still some depending on the internal resistance of the pack. Better quality (higher price) should mean lower internal resistance and less/slower natural depletion. Avoid cheapo 'no names'. A pic of the battery would be more use than one of the RX😉 Cheers Doug 😎

baking soda sub by BritVic Apprentice   Posted: 1 month ago
https://www.tinker style='background-color:yellow;'> Good luck! I can do 3D printing if tempted by whiskey ;)

Re Sea Rover by Wingcoax by philpjuk Sub-Lieutenant   Posted: 1 month ago
Batteries!, always a problem in the 50s on "paper round" money, used to cadge,"borrow" or steal batteries for our boats.Used to be able to buy a cheap kit and even a cheap Japanese motor (coupled to the prop shaft with bicycle valve tubing) but it would be unused for weeks until I could afford a battery, and then they did not last long.Used to borrow batts from my dads bike lamps,my grannies gas stove lighter and the door bell!.Also use to be able to remove cells from the "winner 120" batteries from my dads sky queen radio as the HV cells used to discharge first.This was the downfall of glowplug motors,we could start them at home but on getting to the pool the tall 1.5v battery would be flat.My dad showed me how to locate good cells on duff car batteries by putting a load on them and measuring the voltage across each cell,we then emptied the acid out into mums washing up bowl and sawed the good cells out,refilling them with acid filtered through a handkerchief!,this worked a treat for starting glow motors but my hankie and the pocket I kept it in suffered!I eventually sorted the power problem by using a clockwork motor removed from the family gramamphone to fit an autochanger.

3D printing by RNinMunich Fleet Admiral!   Posted: 2 months ago
Hi All, here's another useful link for the curious, beginners and pros (like Wayne) alike😉 style='background-color:yellow;'>cad/?omhide=true&utm_source=Newsletter&utm_campaign=5226a02f9b-Newsletter&utm_medium=email&utm_term=0_9dffeeddae-5226a02f9b-366732985 Descriptions and sources of FREE design software for all levels and user intentions. Also able to simply import existing designs and print or modify; e.g scale 👍 Cheers Doug 😎