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Member postings for MAD Dave

Here is a list of all the postings MAD Dave has made in our forums. Click on a thread name to jump to the thread.

Thread: Motor stand offs or boxes?
08/01/2021 00:32:10

Has anyone tried 3D printed stand-offs and/or boxes? Obviously structural considerations to be thought through but exact size - no problem!

Thread: Sign of the times - funnies
29/12/2020 18:20:46

A school chum of mine struck back - ONCE. He carefully hollowed out the core of a chalk stick with the point of his compass and filled it with red match heads; carefully concealing it all by packing the open end with some of the powdered chalk he'd generated. He placed his loaded piece beside the blackboard shelf having first removed all the others. Next lesson, the teacher scribbles vigorously on the blackboard and, as a result of the friction, surprise, surprise, the chalk bursts into flames and burns the teacher's fingers. It took the teacher a microsecond to fathom the culprit's identity; it was more than a blackboard rubber that headed his way!

Thread: Advent Prize Draw - 24th Dec - last one!
24/12/2020 12:32:49

Season's wishes everyone, stay safe!

Thread: Advent Prize Draw - 23rd Dec
22/12/2020 20:03:59

This might help cure my feelings of being a mushroom....?

Thread: Advent Prize Draw - 9th Dec (post to enter)
09/12/2020 16:16:07

To win this one would be absolutely phantasmagorical!

Thread: Aero art
16/07/2020 23:53:05

With all due respects, it is does not correspond with Salisbury Cathedral's structure; used to live just down the road from it.

Thread: Modes 1 or 2
15/02/2020 15:43:02

I don't understand why you guys are ignoring Mode 3 - the mirror of Mode 2. I am left handed and it has always worked for me. It was my initial set up way back with my 27MHz Fleet gear and, being LH'd, seemed the most logical to me. Still does!

Thread: Web Cam?
08/02/2020 18:38:48

FAO Fun Flyer, sounds like you have an ideal set up. I would be most grateful if you could let us know what set up and hardware you employ etc.

Many thanks.

Thread: Club badges
19/12/2019 00:00:51

.....and ours.........

circular pmfc logo jpg.jpg

Thread: Wattmeter Quandry?
02/11/2019 00:01:17

Experimental error Simon? Suggest try again a couple more times to consider the range of results. Talk Sunday.

Thread: Design assistance request!
01/11/2019 22:51:08

Having got my 3D printer kit built and working successfully, I have used Tinkercad to design and print a few sundry items, even a made-to-measure battery tray/Rx mount for my "pre-loved" HK Spitfire. I am very pleased with the quality of the prints so far and have aspirations to use the printer for further modelling bits and pieces. As a start, I decided I would like to have a go at constructing a simple straight sided (trapezium) outline fin for my latest home build project – and have hit a brick wall. I am aware that a classically built up fin would probably be lighter but just wish to give it a go and see what I can achieve.

My status in the 3D print world is of course biased toward the inexperienced end of the spectrum, so, any tips and suggestions would be most appreciated.

Put simply, I have the root aerofoil and the tip aerofoil but I cannot see how to smoothly fill the space between them. I am quite able to position each aerofoil correctly in 3D space in software relative to each other but filling the space between them is my challenge. I am yet to come across the "secret button" or process.

I have had reasonable success with Tinkercad and have installed Fusion 360 on my pc. I am slowly working my way into '360.

As stated above, any help would be much appreciated.

Thread: Glue for PLA and PET-G
01/11/2019 22:10:36

Having got my 3D printer kit built and working successfully, I have used Tinkercad to design and print a few sundry items, even a made-to-measure battery tray/Rx mount for my "pre-loved" HK Spitfire. I am very pleased with the quality of the prints so far and have aspirations to use the printer for further modelling bits and pieces. As a start, I decided I would like to have a go at constructing a simple straight sided (trapezium) outline fin for my latest home build project – and have hit a brick wall. I am aware that a classically built up fin would probably be lighter but just wish to give it a go and see what I can achieve.

My status in the 3D print world is of course biased toward the inexperienced end of the spectrum, so, any tips and suggestions would be most appreciated.

Put simply, I have the root aerofoil and the tip aerofoil but I cannot see how to smoothly fill the space between them. I am quite able to position each aerofoil correctly in 3D space in software relative to each other but filling the space between them is my challenge. I am yet to come across the "secret button" or process.

I have had reasonable success with Tinkercad and have installed Fusion 360 on my pc. I am slowly working my way into '360.

As stated above, any help would be much appreciated.

Thread: Cheap Chinese Laser Cutter
27/09/2019 11:45:06

......which is the background as to why I was enquiring about laser "life" earlier in the thread

22/09/2019 19:22:10

Is there any clue to the life of the laser?

Thread: Glue for PLA and PET-G
25/08/2019 11:58:05

Many thanks for your inputs chaps.

I have yet to get my Prusa Mk3s kit out of its box, having stalled at the somewhat voluminous assembly instructions book! In the meantime, if anyone learns something significant re PLA/PET-G adhesive, please let me know via this thread.

Back to studying the assembly instructions...........

21/08/2019 14:04:48

Has anyone tried uv curing adhesive? 3D materials in particular.

21/08/2019 09:29:38

I have just ordered my (first!) 3D printer with a view, in part, to it contributing to my model builds; possibly even construction of whole models.

In the case of a "whole model", printed in pseudo-Airfix components and glued together to form the whole, I am at a slight loss to know what adhesive to use; PLA and PET-G in particular.

Does anyone out there have any practical experience and recommendation(s) please?

What I am particularly keen to avoid is the likes of this........... **LINK**

Thread: How to reduce voltage?
16/03/2019 14:38:53

I don't believe significantly so. A forward biassed semiconductor (eg, a diode) of the silicon variety will, under normal circumstances, always exhibit a voltage drop between 0.6 and 0.7 volts; in parallel or not!

16/03/2019 13:20:19

Place some diodes in parallel to share the load, ie, heat. Recommend the same spec. devices.

Thread: 1/6 Westland Whirlwind
14/02/2019 18:15:12

Where's the best place to acquire a selection of those plastic topped pins please?

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