I was browsing through some old posts in this section, when I came across a reference to Mathematical Models by Cundy & Rollet. A little later, I was wasting a few minutes on Amazon, and by coincidence I saw that they now have paperback copies in stock. The book itself is decades old – I still have ...

Back near the start of this long-running thread, Rob Adair lamented the fact that the pictures in Magnus Wenninger's book are in black and white. I'd have thought that there are enough posted photos in this newsgroup to cover many of them. Wouldn't it be nice to assemble a pdf of these images ...

Another great model, Rob. What's your opinion of "Adventures among the Toroids" ?

Pete K

Yes, it is very attractive.

Yes, a very nice model. Makes me want to reach for the glue...

Pete K

Awe-inspiring! What will the radius be? I've seen several of your models in the past, but previously, I've only considered the holes in the faces to be decorative. Having spent a few minutes studying the current image, I see that the holes also permit a better appreciation of the structure of the ...

Rob,
Yes, you are correct - its UHU, not UHO.

I just experimented with a piece of plastic which I cut from the box containing the plastics straws. It is that tough, transparent stuff that feels similar to the shrink-wrap plastic that you find on many items these days - difficult to get off unless ...

Rob,

Funny you should raise this now as I'd been thinking about it the other day. I posted a reply on a different topic recently, on the gluing together plastic drinking straws. If you can get your hand son it (not too literally), try UHO Por; it seems to work well with many materials, but ...

You might try contacting hamp856 - he has posted some wonderful wooden models here in the past, and some of them are spheres.

PeteK

Yes, Rob is they boy wonder. Don't forget to post some pictures when you are done. Peter loves pictures.

Pete K

I just tried gluing two plastic straws together using UHU Por and it worked very well - a nice strong bond without any melting. I didn't try anything clever, I just glued them side by side with a patch of adhesive about 1 cm long. I think Por is great. I bought it originally to stick together ...

You select the heptagrammic face, hit: scale->stretch (non-uniform scale)..., enter the desired value (scale by or set value to ...) and "perpendicular to selected face".

Ulrich

Thanks Ulrich, that did the trick nicely, though I didn't select the "perpendicular..." option. Somehow I thought you ...

How can I reduce the height of Heptogrammic Pyramid 1 in Stella's database so that the pyramid is much flatter ?

Ta,

Pete K

robertw wrote:First time I've seen a spammer actually post something that made some effort to fit with the forum though!

Well if they are looking for the right angle, I'd say they came to the right place

Pete K

Thanks Rob. I did try that, but I must have screwed it up. I just tried it now and it appears to work.

Pete K