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>> Home > Tags > cad

cad
cad
1950s sea commander refurb. by DodgyGeezer Commander   Posted: 13 days ago
".....Thanks for all your comments and input. What i really need now is a copy of the templates sheet so that i can cut some new parts to replace some of the missing ones ....." There was never a 'templates sheet', of course. There were just the original kit parts. This is a fundamental problem with trying to 'save' old model boat plans. The aircraft plans usually have all parts described precisely. Many - possibly most - boat kits are essentially sets of parts with assembly instructions. So, if you need to reproduce an old kit, you need to include part templates as well. Which means a lot of work for someone. Not only do you have to obtain an example of the original kit, measure it up and draw it using a CAD package, but you also have to allow for the fact that wood changes, and that die-cut parts may be cut badly, and so what you have measured may need correcting - sometimes quite extensively. Here's a classic example - the old Yeoman MINX, with templates drawn up...

Lazer cut Kits by HAKits Petty Officer   Posted: 20 days ago
Hello, As i said the kits are based on models i built in my youth. Now i am retired i enjoy drawing in cad and the challenge of turning my drawings into models, I thought other people might wish to build my models especially younger builders and so i sell the kits at cost. I take on board your helpful comment and will remove them from my advertising.

Fairmile D 1/24 Scale Build by reilly4 Fleet Admiral!   Posted: 26 days ago
I am afraid that I disagree with the comments about Doug. They do not reflect Doug's comments or intentions. We are here to offer assistance to those that request it and others that may learn from the comments etc. Doug offers some of the best most practical advice from his experience. A Fairmile D had 4 engines and props. If you want to recreate it as a true scale model then that is the the aim. You are entitled to have one prop, one engine and one SLA battery in your boat. It may plane for approx 10 minutes before it slows and drops off the plane. I had such an arrangement a few decades ago in an old MTB, but have learned from it and moved on. I would not advise this arrangement with all the newer motors, battery types and ESCs available. My Fairmile D has 2 x Speed 700 motors and NiMH batteries. It runs on plane for an hour or more. My newer Vosper MTB and La Combattante III boats have 2 x brushless motors each and the same NiMH battery packs - my choice. Other people use LiPo batteries. We respect all modellers and their quest to build 'their' own models. Nothing wrong with having the best advice available, so modellers can make up their own minds.

Holy SMOKE !! Video, Tin Can Madness by RNinMunich Fleet Admiral!   Posted: 26 days ago
BTW: I grew up with valves (or bottles as we Brits also call 'em) as well. I still have a box of several vintage 'bottles' in the cellar, many of them new still in the original boxes. If you ever run out of triodes, pentodes or tetrodes give me a buzz! Think I still have some pristine EL80s - collectors items these days - lots of Oomph 😁 My next non-model boat electronic project is a pair of digital clocks in 'Art Deco' cases, using bottle decade counters. The forerunners of the fluorescent tubes and then the LED clocks, but much more fun😉. About forty years ago I spent a year or so servicing and calibrating the radiation monitors around UK nuke power plants using these decade counters. One cosmic radiation click = one jump in the base counter and so on. Never ever saw anything above the basic cosmic radiation background count which is always there. A remnant of the 'Big Bang'. 😲 Funny where an interest in electronics and radio can getcha 😁 Look forward to your chimney experiment report👍 My destroyer has two funnels but I found that the little railway smokers were not man enough to feed two funnels via a branched tube. But two working in parallel off the one RC channel did the trick. Regarding the chimney effect; Works well at rest or at low speeds, but I also found that instead of a fan some traditional air vent scoops mounted forward of the smoker augmented the effect well at higher speeds. And my long thin destroyer with 2 x 540s on 12V made a lot of 'speed boats' look silly 😁 Have fun, ciao, Doug 😎

Abracadabra by Puddle-pirate Chief Petty Officer   Posted: 1 month ago
[Score: 5/10] 13"/800g Abracadabra Capable of 4mph Single Propellor (2 Blade S Type 25mm) Geared to a K&O 1958 Johnson 35HP (2 Blade S Type) Powered by LiPoly (7.4v) 13Amp/h Batteries Controlled Through Alloet 320 A ESC - Comments: A retro-stored 1950's vintage Fleetline boat with an original 1958 vintage K&O outboard recently converted to 2 channel RC.

CNC boat kits...? by marky Fleet Admiral!   Posted: 1 month ago
Retired now but when I worked at the College the CAD Technicians just held material in place with masking tape they were cutting anything from silk to 12mm hard woods

CNC boat kits...? by DodgyGeezer Commander   Posted: 1 month ago
It's surprising what you can manage on your kitchen table nowadays! Laser cutters are readily available - I could mount one of these on the eShapeoko - https://www.ebay.co.uk/itm/60W-CO2-Sealed-Laser-Engraver-Tub... style='background-color:yellow;'>cad07259%26pid%3D100005%26rk%3D2%26rkt%3D6%26mehot%3Dpp%26sd%3D182940435313%26itm%3D183440666025&_trksid=p2047675.c100005.m1851 - but the associated safety provisions would mean doing the cutting in the shed rather than the kitchen.... and the cost is not extortionate. At the moment I'm more interested in getting up to speed with the technology and the associated costs. Open Source is a wonderful invention - it means that all of your software is free, and the hardware is low-cost because there has been no R&D investment associated with it. I reckon that you can get a cutter with a 1 sq ft bed for 300-400 pounds at the moment, and the prices are coming down all the time....

All hooked up, nowt happens... by canabus Fleet Admiral!   Posted: 2 months ago
Hi All If you require a brush ESC. The Hobbyking one is the only one I have found with straight forward/ reverse with NO BRAKE. Set is with links, but the they only work on Nicads and Lipo batteries. They will run on 12 volt SLA, but no less!!!! I am using them in my two Hellen fishing boats with 55 turn rock crawler motors on 2S Lipo on 60% throttle. https://hobbyking.com/en_us/hobbywing-quicrun-60a-2s-3s-wate... Canabus

Upper & Lower Chines by rolfman2000 Fleet Admiral!   Posted: 2 months ago
Oh how this brings memories flooding back from 50 years ago, seeing the same construction as my original Veron Police launch (that's sat in the garage), going together. I bet the fit is a darned sight better than it was all those years ago, what with cad laser cut pieces and cad designs as well. I'm following this with even more interest, as I have permission of SWMBO to get the new bigger kit when it becomes available. Fingers crossed, not long now. Keep the installments coming Robbob. Best wishes, Dave W 😊

Proximity (Hall effect) sensor wiring by Haverlock Fleet Admiral!   Posted: 3 months ago
I do not know how much knowledge of electronics your friend has but I need to point out that a hall effect sensor is not like a relay. While they do act like a switch ( sort of) they need to be powered and have a hall effect voltage to switch. This would mean in the use intended there would be a current drain on the sensor and if the power supply ( battery?) voltage fell to far it would not function. The effect you want could be replaced by a reed relay cheap and simple to use. However reed relays can only pass low currents so would need to be cascaded with a higher rated relay before switching the main battery supply on and off. https://www.ebay.co.uk/itm/10-Pcs-2-5X14mm-3-Pin-4W-Glass-Re... these reed relays have both normally open and normally closed contacts and at a couple of quid for 10 worth buying so he can experiment.

HMS Cadiz by landie Chief Petty Officer   Posted: 3 months ago
[Score: 10/10] 48" HMS Cadiz Capable of 3mph and a runtime of 120mins Twin Propellors (3 Blade 25mm) Direct Drive Powered by LiPoly (14.8v) 7Amp/h Batteries - Comments: Scratch built other than a fibreglass hull, built by my father over about 5 years using a mix of balsa, plasticard, ply and wire. He never sailed it but when I inherited it I was determined to complete it ready for it's first "sea trials". I've completed the RC installation and adjusted the ballast and it's now had two successful outings at the local boating lake.

Smoke generator by landie Chief Petty Officer   Posted: 3 months ago
Mine is still in the "pile of bits on the bench" stage but when I figure out how to package it I'll post some pics. The model it's going into is HMS Cadiz, battle class destroyer which is around 1:96 scale so there's not a huge amount of space available, especially as the funnel is currently above the radio gear and batteries so I'll need to pipe the steam from the spare compartment I have nearer the bow.

Broads Light Class Cabin Cruisers by NorfolkBroads Chief Petty Officer   Posted: 3 months ago
Many thanks Richard indeed. Yes, decades of knowing these craft in real form and the designers and builders right back has hugely helped us of course gain such a first class reputation of precise detail. However, like all these things, such has not come without heartache, where in running up a one year purposeful trial as a manufacturing business for these, I simply failed in being far too much of a perfectionist, and this took too long in getting every kit out. Although we perfected the trial run on time for every customer, we realised it could not continue without mass stress for a sustained period of years, and so sadly had to pull the plug on the purposeful trial, much to the disappointment of many potential customers. Broke our hearts too, but then, what were we to do, our pride told us to pull back before running up a full production.

HMS BRAVE BORDERER by RNinMunich Fleet Admiral!   Posted: 3 months ago
Mornin' JB, Guess I'll have to remain 'agnostic' on this issue for now - I'm still to be convinced. This might explain a phenomenon I've noticed during testing of the Taycol Supermarine I've just renovated for Colin. More on that later in the 'Supermarine resurrection' blog. I'll do some experiments using my digital scope and see if I can trap and measure these elusive spikes for various wire lengths😉 Can't comment on the guy from Castle, don't know them, except to say that I found his comments a bit vague and without explanation. There are also contradictory posts on that link; some say before the ESC some after. Can't really see the point of putting the caps in front of the ESC, switching spikes SHOULD only appear on the output side I'll look at that on the scope, and after all a fuse to protect against fouled prop and jammed motor is standard fit between battery and ESC, or should be! So some wiring extension for that is essential. Also I would expect the battery to flatten any spikes that do appear at the ESC supply side. As you say the internals of several 'manufacturers' ESCs are often the same. Nothing new, branding and badge engineering has been going on for decades for all sorts of things and no RC kit manufacturer / distributor produces his own components. Important factors are; quality of his own assembly and where does he buy his components - originals or cheap copies? 28 ESCs! Wow 😲 and I thought I had a lot! As reported I have so far had good results with the Quicrun series, both brushed and brushless. Next one to test is their Dual Brushed version. Prior to going brushless I used a lot of Graupner ESCs - made in Korea., never managed to blow one of them either, not even the little micro and pico jobs. Thanks for raising this issue - I like a good debate and we can all learn something from it I hope👍 Plus; piquing my curiosity is always dangerous 😁 Greetings to Down Under from 'Up Over', cheers, 😎Doug PS Further thought just struck me (Ouch😡); if this is really a dramatic problem why have I never seen any warnings about it in any ESC instructions? Yes, I'm THAT guy who actually reads the instructions!!

Building my Carina sailboat from scratch by Hellmut1956 Sub-Lieutenant   Posted: 3 months ago
I have started the building from a plan I did purchase. So building from scratch is probably the right term. I am 61 years old and I have spent about a decade working on it. I use to build sailplanes as a kid and I did purchase my last sailplane shortly before leaving the university and there it is. Still, not even started working on it. In 2000 I lost my last job employed and reaching the age of 45 I was told I was already too old. So after a number of years, I did realize that I would not get hired for a job anymore and that reactivating my old hobby was a good thing to do. Being financially limited I decided to switch to a sailboat. Those do not crash as planes do and so building a sailboat from scratch looked to be a real option. I need to comment that I use to be a so-called Field Application Engineer for one of the large US semiconductor companies. Then, the career makes you develop into managerial positions. Disappointed by how salespeople worked and I shifted to sales when moving to another US semiconductor company. My active professional employed life did get me to be a Business Developer Director with one of the largest US telecommunication companies. Due to this history at a certain point of my project of building a sailboat from scratch started to have electronics and informatics becoming the dominant activity. Another topic that influenced about what I am doing on this project was due to now limited financial resources. So I decided to work on improving my workshop and to organize the many items I had been accumulating over the many years. It used to be easier for me to buy something I knew I had somewhere in my workshop. So this also influenced my activities on my workshop. Finally the heavyweight of electronics and informatic aspects of my project I started to build an electronics workbench. Sadly I do have a lot of health problems, 4 strokes, heart-stopping to beat due to side effects of medicine I was taking since I was 19 years old I got a pacemaker. Lately, I am slowed down due to being tired for many hours of the day and by suffering from a reduced concentration capability. As being positive, as having a well organized day and fascination to force that organ between my ears to work so that it can reorganize itself, I am happy working on the diverse subprojects. So the work for my project has become my focus and objective and not finishing the project.