Michael42er has taken the Hippo model and made it his own. It looks larger than the original and he's made some other changes as well. The bird cam has cut-aways in it gving it a lighter, more techy look. The hippo herself has a second set of lower teeth and the small gear has been slimmed down. The end result is this rather splendid video.

Nice work Michael!


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I've uploaded a new YouTube video featuring the Hippo model. Check it out here, on the original Hippo page or here on my YouTube channel

You can download the hippo here


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Hippo Model, Looking for a home!

I've bought a sturdy box and some packing materials. The Hippo model is ready for a trip! If you would like the Hippo model to come and live with you and you are a paid up member, please leave a comment below. At the end of next week I'll pick a name out of the hat and choose a lucky winner!

Thanks in advance for your interest!


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I mentioned in the instructions for the Hippo model that you could, if you chose, cut out the holes on the big gear thus making spokes. I thought I'd add some photographs to show you what the gear looks like with the gears cut out.

In my opinon it looks better with the real spokes but do bear in mind that this really is a case of form over function. The cut away gear is significantly less strong than the solid gear. It works fine in this model but using cut away gears where there is more power needed may well not be possible.



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Hippo. Download and make.

Turn the handle, the gears mesh and the cams turn. On top of the box the hippo slowly opens her mouth wide in a leisurely yawn whilst the bird flits back and forth looking for insects to peck.

Members can download the hippo for free, thanks for signing up! Non-members can sign up for £2.50 from the website.
Download the hippo here
!


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Kickstarter - Last Few Days

I'm excited to say that I have a small part in the SocketCircuit KickStarter project. You can find out all about it by visiting my website here or better yet link straight to the KickStarter page here and help make the project a reality!

 


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£2.50
Download Hippo
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Turn the handle, the gears mesh and the cams turn. On top of the box the hippo slowly opens her mouth wide in a leisurely yawn whilst the bird flits back and forth looking for insects to peck.

Paid members can download and make this model for free from the link. Non-members can download the parts for £2.50UKP

Once you have downloaded the file, print out the parts onto six sheets of thin card. 230gsm or 67lb is about the right weight.

Score along the dotted and dashed lines before carefully cutting out the parts.


Fold round and glue the side of the box top and base to make right angled triangles.


Fold of the end of the box end to make triangular tubes.


Repeat the process with the other two box ends.


Join the three parts together to make the other box end.


The two box ends are different lengths. Use the grey glue areas on the sides of the top and base to work out which end goes where then glue together the four parts as shown. Leave one side open as in the picture.


Glue the head support into place.


Fold over and glue down the ear ends to make double thickness card. Once the glue is dry cut out the ears.


Curve round and glue together the head. Notice how the nostrils stick up. You did cut them out didn't you?


Roll round the two small rectangles to make toothy pegs.


Glue the teeth into the head with approximately three millimetres protruding.


Glue the head push rod to the inside of the head. Line up the end of the long tab with the crease arrowed in the picture.


Assemble the cam follower and glue the tab to the inside front of the box.

Glue the head to the head stand.

Thread the push rod down through the hole and glue the end to the cam follower.


Wrap a coin in a off-cut of card. (I used a UK penny. One Euro cent or Dollar cent is also ideal)

Glue it to the underside of the cam follower. The extra weight will ensure good contact between the cam follower and the cam.


Glue the body to the grey areas on the box top.


Fold over and glue down the big gear and the two cams to make double thickness card. Let the glue dry completely.


Cut out the gear and cams. If you choose to you can cut out the six holes in the big gear to make spokes. It looks nice but is not necessary, you decide!


Glue the teeth of the small gear into place on the grey areas of the gear back sheet. Leave the ends unglued as shown in the picture.


Glue the two gear inners back to back then glue them to the yellow axle lining them up with the grey line nearest the end of the square tube.


Roll round and glue down the teeth round the gear inner.


Glue the ends closed then glue in the tooth ends to complete the gear.


Roll up the two axle tubes lining up the ends with the arrows along their length.

 


Push the yellow round axle into place in the tube

Thread the three lobed cam into place and glue it into place lining it up with the central grey line for alignment.


Assemble the large gear wheel in the same way. The gear lines up with the line closest to the side of the square tube, the cam lines up with the more central grey line.

Make sure that you put the cam on the correct way round, use the picture as a reference.


Fit the two gears into the box. Fold round and glue closed the box fronts to locate the gears into position.


Assemble the bird stand. Glue the tab into place on the grey area.


Thread the bird stand up through the box top and the hippo body.


Glue the tab onto the grey area on top of the hippo.


Glue the bird to the end of the bird stand as shown.


Assemble the handle in three steps.


Complete the model by gluing handle into place.


Turn the handle and bring your model life!

You can see the model in animated action in this Instagram video:


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2
extract
Mon 8th Sep 2014

Finally! I've got all the parts together for the Hippo model. All the photography is done, I still need to finish labelling the parts and write the instructions then I'll be done..

Here'e the completed model, check out my Instagram feed to see it animated action!


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KickStarter is an intriguing idea. Present your idea for a product or service on the Kickstarter website and if you can persuade enough people to support you your idea gets funded. Fall short and your followers aren't charged and you receive nothing. I've supported a few projects on KickStarter some successful and some not. I have also had a few ideas for my own KickStarter projects but so far not taken the plunge. So when Cory from SocketCircuits got in touch to see if I was interested in collaborating I jumped as the chance.

Cory has set up a KickStarter project that is "An electronic circuit construction system that aims to bridge the gap between learning electronics, and inventing electronic products."

 

My contribution to the project is a modified version of the Paperbot model. Cory has taken this model and added a Barrier Grid Animation and LED illumination to make this delightful Barribot. The display in the chest has been cleverly designed by Cory. Two sheets of printed cellulose film give the effect of an animated four column bar graph. The internal LED illumination makes the whole thing glow.

It's now over to you. We've got twelve days to get Cory up to his goal so that this delightful project will go ahead.

>> Go sign up here! <<


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3
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Fri 29th Aug 2014

I received an email from the nice lady at Wiley publishing this afternoon. My book Paper Engineering & Pop-ups for Dummies is being translated into Persian! That's the second translation for this book to add to the Bulgarian version which is in the process of being done.

Once the translations are printed I'll receive author's copies which I'll be sure to blog about. Meanwhile I had a quick go with Google Translate. Google didn't like the word 'dummies' so I replaced it with 'beginners' apart form that small change the image on the right shows the book title first in Persian then in Bulgarian.

Both books should look really exotic!


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3
extract
Thu 28th Aug 2014

Back to work - it's great to be back!

I'm starting by completing a couple of open project, first, the Hippo that I was working on just before the family hols. I've put together a working prototype pictured here.


The box houses a couple of gears. The small gear is driven by a handle on the far side of the box. The larger gear runs at about a third the rotational speed of the small gear and is used to open and close the mouth.


Viewed from the other side of the box, the three lobed cam moves the small bird back and forth. The right hand cam lifts the mouth open slowly then does a couple of small lifts. Nom, nom nom.


The end result; turn the handle, the little bird moves quickly back and forth and the hippo sleepily opens and closes its mouth.

Looking good so far!



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