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GrahamF

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About GrahamF

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  1. GrahamF

    Is WNW nearing the end of its run?

    I think the chatter about kits quality what's missed off, done badly etc may be the reason why Airfix don't do 1:32. Perhaps the size of the models is caught between two awkward stools, big enough to 'technically' have every detail of a 1:24 kit but the customer not prepared to compromise like they would on a 1:48 kit. So they don't go there. Graham
  2. GrahamF

    Why no larger scale airliners?

    I did consider doing a DC4 in 1:32 scale as a resin kit but its a lot of work just to sell about 30 kits. Graham
  3. What's interesting is it doesn't appear to have a 'lifting body' shape to the fuselage, where areodynamically the fuselage cross section is like a wing to help with lift in forward flight. Graham
  4. GrahamF

    Vacuum Chamber or Pressure pot?

    Personally I would avoid using talc because you will remove the natural release agents present in the silicon a lot earlier and dry out the silicon rubber, if you're pressurising the resin you Don't need to. I have never found release agent that helpful when it comes to casting and now never use it plus it's expensive anyway. A big issue I've found is being careful with what rubber you choose, I use a clear silicon and a resin that is known for not being aggressive to moulds. Occasionally I make some fuel pitots for a target drone company and I have to use the resin they specify but its so aggressive ( and smelly ) I barely get more than 20 casts out before the mould is shot. Graham
  5. Touch wood , I have never had a parcel go missing completely in 6 years but this is a heads up to anyone who is expecting or are sending Tracked Parcels to Europe, Royal Mail in their wisdom sub contract their parcels to GLS Couriers in Europe [ A German Company ] I've had two incidences recently and only realised how useless this lot are, looking at their feedback the complaints are always the same. If you are out when they try to deliver they leave no footprint at all of that attempted delivery and take it to a 'Parcel Shop' so you are totally ignorant of the fact that you have a parcel. I would recommend that on the 4th day of a Tracking number sent to you [ say from the UK ] that you keep an eye go on the Royal Mail website and put in your tracking number it will then divert to the GLS website which has a very jumbled layout and you have to keep on Tracking by clicking on more boxes to get to the most recent time, It's here that any reference to taking it to a 'Parcel Shop' will show up if you think the parcel is a bit late. They will send any parcel back to the sender after 7 days and will not attempt to contact you even if your phone number is on the Label. Hope this is useful. Graham
  6. GrahamF

    Is WNW nearing the end of its run?

    The Lanc may very well be the last kit as I think they're going to be disappointed in numbers sold compared to the gargantuan task of getting it to market. Graham
  7. GrahamF

    History of the land speed record

    Surely a compromise is possible? Have it in the museum but occasionally move it and run it, The Railway fraternity do this all the time with their locomotives. Graham
  8. GrahamF

    Vacuum Chamber or Pressure pot?

    I've found the reverse is true from all suppliers be it Axson, Alchemie, Etc although they will sell you the resin and know about cure times and hardness etc they have little knowledge of the actual process of moulding and casting your particular prototypes. I only found the best way was to talk to fellow professional modellers who had experience in producing products. Graham
  9. GrahamF

    History of the land speed record

    Very interesting, I take it everyone knows that Donald Campbell's Boat was recovered from the bottom of lake Coniston and restored last year to run on the lake again? Graham
  10. GrahamF

    Vacuum Chamber or Pressure pot?

    I've been down this rocky road for a while now. The only way you will get the resin into every part of a mould is to vacuum de gas the resin after mixing while in the mould, crucially in the short time before it starts to set so that you can quickly put the moulds with resin in into the pressure pot until it sets. The pressure pot is a paint spraying pot with the spray gun and hose taken off. The pressure is 60psi max ( the same as your bicycle inner tube) but is enough to squash down any bubble to nothing. Now the ideal thing would be a resin that sets in 5 mins and can be demoulded in half hour, To give you time to do the above at a reasonable pace.This does not exist! If it did I would be using it. Most resins ( that are any good )are 2 mins working time and 45 to 60 mins demould. Also low viscosity is needed as well. So the process is unsuited for mass production. For mould making you only need a vacuum chamber and you need to de gas the mixed silicon and then pour into the mould box and then de gas again, this process is easier because the silicon gives you at least 45 minutes working time but the setting is usually 12 hours. So to re cap resin needs both processes. Your vac chamber needs a powerful pump mine gets down to full vacuum in 20secs, your pressure paint pot needs a compressor ( preferably a quiet one ). Graham
  11. GrahamF

    3D Printing

    I've found the resin a bit soft for scribing but that maybe down to my personal preference, I prefer a hard material so that the scribe tool doesn't have too much of a chance of digging in. Graham
  12. GrahamF

    1:24 Trumpeter Ju87 D5 fuselage length

    I wouldn't worry about the discrepancy if somebody made a perfect kit maybe in resin you probably wouldn't buy it anyway.
  13. GrahamF

    3D Printing

    I wouldn't bother with the panels line as they won't print out crisply. Graham
  14. GrahamF

    3D Printing

    You can't do the panel lines sharply with 3D printing, I've tested it, my issue is that I only need to do a really good master part once for moulding so my weapon of choice is 3D CNC as the resulting part is indistinguishable in quality from an injection moulded one. I've found 3D printing always a little bit wobbly or rounded at the corners in one way or another. Graham
  15. GrahamF

    1:24 Trumpeter Ju87 D5 fuselage length

    It's not that at all they just think they do it best. It's a cultural thing.
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