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Thanks, I'm glad you like it!

Thank you very much, I am indeed pleased that you liked it!

You could simulate it, but I'm unsure as to whether or not you could quantify the reflexive action of a 3D printed PLA drum. The reason for having both pitch and yaw control over the drum heads is to, hopefully, account for this.Your link is filled with advertising, use caution.

I always start small...Thanks, I'm truly glad you enjoyed it! If the machine is assembled tight, well aligned, on a solid surface and secured in position, it has run about 6 hours before a ball bearing leaves the circuit. I've found that it really helps to weigh the ball bearings and use only those with matching weights; I've ordered a bag full.Thanks again!

Thank you very much!It mesmerizes me at times...

Thank you very much, I really appreciated you taking the time to comment!

Thanks, glad you like it!I would truly enjoy seeing your results, I like the big rock idea!

Thank you very much!I spent about 14 hours designing both this one and the hand operated version. The hand operated version was first, and with a simple modification to the base (about an hour), the motorized was second.

Congratulations, you "Persevered"! Looks great!

Looks great! Very nice work and I like your balloon!

Thank you, and thank you for printing this model.I'm truly sorry you experienced difficulty in printing this model. In my "things to do" file is making a windup version of this model for those with printers that have difficulty with this model.Thank you again, and again, I'm sorry for the difficulties.

No, it is not French, it is English. In (Oklahoma?) English, "perseverance" translates to "keep trying whether or not success is possible", and "petit" translates to "small" (the original Perseverance, as discussed in the description was quite large).But thanks for letting me know that in French, at least, it doesn't mean anything.

Thank you very much, I am very appreciative that you liked it!

Thank you!I attempted to add a small amount of "whimsy" to the design, hence the exaggerated movements of the legs and torso.Thanks again.

Thank you very much, I'm glad you liked it!Start by testing your printer, printer settings and colors by printing one "Spur Gear (10 teeth).stl" and one "Axle Gear.stl". I do recommend printing the gear on a raft (see the PDF). Test to make sure you can thread the axle into the gear and if so, you should be good to go! If not, clean the threads in the gear as described in the instruction.Thanks again!

Thank you very much, I am truly glad you enjoyed it!

Thank you, glad you enjoyed it!

Wonderful work!

Thank you so very much, I'm glad you enjoyed it.The only program I used for the entire design was Autodesk Fusion 360. The gears were generated with the gear add-in with a specified number of teeth and module in order to obtain the desired pitch radius. I also add .5mm to the computed distance between gears for 3D printing.Thanks again!

Thank you very much, I'm always glad when someone finds enjoyment from a design, it makes my day!Thanks again!

Thank you very much, I'm glad you liked them!

Thank you very much, I'm glad you enjoyed it!After building quite a few of the first generation, I learned, as always, there was indeed room for improvement.

Thank you very much, I'm sincerely glad you like it!

TPE,No, I've done no other magic tricks as of yet, but I'm always looking.Greg

Thank you very much for the tip, I just did!Thanks again!

Thank you very much, my grandkids love them on their ceiling fans, and I'm glad you liked it too!

Thanks you very much, I am very glad you liked it!

Very, very nice engineering. I am indeed impressed!

Thanks! And a roar right back at you from me and my grandson!

Thank you very much, I'm truly glad you enjoyed it!

Thank you very much, I hope you do get a printer and print one!

You are very welcome, I hope it is useful! And thank you!

Thank you, I'm glad you liked it and hope it is useful!

Sorry it took so long, but here it is: https://www.instructables.com/id/The-Design-of-Cy...Hope this helps and if you have any further questions, just ask and I'll do my best to answer them!Thanks again for your kind words, I really appreciate them and your interest in this model.

Congratulations! Very nice work! I love the colors you used.

Thank you very much!I really like the colors you chose on yours, looks great!Congratulations again!

Thank you so very much, I am very glad you enjoyed it!

Thank you, I'm very glad you like it!

Thank you so very much, I am glad you like it and indeed hope you make one!

Thank you so very much, I'm truly glad you liked it!I've been admiring your work, you are legendary!

Thank you so very much for your kind words!I tend to design towards simplicity and openness (I like to watch the "internals" of the design).I used Fusion360 to design the cylinder, and have the patterns and bodies in a single file. I'll see what I can do.And the answer to your final question, 3!

Thank you, I'm glad you liked it, we race them and they kids and grandkids love them!

Thank you so very much, I'm very glad you liked it!

Thank you so very much yet again, I'm truly humbled that you took the time to browse through my designs on Thingiverse.I'm narrowing my presence to just a few websites, and unfortunately Thingiverse was one of the sites that I stopped posting designs on. But I will be here for awhile, and all of my new designs will appear here first!Thanks yet again!

Thank you very much, and I'm very glad you liked it!The piston was made square for two reasons. First, given a fixed area, a square cylinder provides more volume than a round one and thus allows a larger volume of air to enter the cylinder. For "normal" pistons, square piston rings are indeed quite a challenge to install so for that (and a few other reasons) "normal" pistons are round. And second, a square piston is easier to file square than than a round piston is to file round. This made removing "build plate ooze" easier.Again, thanks much, and thanks for your question! I'm always glad when someone is curious enough to ask why I did what I did, I truly enjoy your interest!

Thanks!Sorry you are experiencing difficulties. Check the following: 1) Before pressing the chassis sides together do all the gears and axles rotate smoothly and with ease?.2) Did you print the spring with 100% infill?Check these and let me know.Sorry again.

There are a few changes to this open chassis design versus the previous open chassis design.First, there's the addition of a 4 to 1 gear ratio to increase torque. This required both chassis and drivetrain changes.Second, I changed the design of the crankshaft journals and printed them at 100% infill.And finally, I moved the engine intake port to the center of the engine to help stabilize the vehicle.I believe that is all, if you have any further questions or difficulties with the models, please feel free to ask.

Hmmmm.....

Thank you very much!

Those look great!You are welcome, we and the grandkids had a lot of fun with them!

Very nice, thanks for sharing!

You are very welcome!Sorry about the missing file, I believe this time I got it right (argh).Thanks again!

I think it's there now.Editor came back online.

I'm still trying. The last one didn't go up, and this morning I can't edit this Instructable. I'll keep checking back. Sorry.

Thank you!I like the looks of the train much better, but a few complained it would take too long to print and require too much plastic. So, I used the same engine, drive train components and wheels, just changed the chassis for a lower center of gravity. It does travel much further than the train thanks to its lighter weight.Thanks again, I'm glad you like it!

https://www.instructables.com/id/Balloon-Powered-Single-Cylinder-Air-Engine-Open-Ch/

I've added "Stl.zip" to the files. Let me know how it works.Thanks again!

Thank you very much, I'm truly glad you like it!I've kind of drifted away from Thingiverse and as such I no longer publish there. Is there a better way for me to format the files for easier download? I'm new here and I'll take all the help I can get!Thanks again, and I hope to see your train engine soon!

Hey that's okay, another member corrected my "formally" which should have read "formerly" in my bio that I have used on all websites I post on.Gulp!At least you're not alone!Thanks again!

Well I've made quite a few:The following is a photograph of my "mistakes" box. I keep it by my desk for three reasons:1) My father always told me if you aren't making mistakes, you aren't learning,2) It keeps me in line,and3) Whenever someone visits my "3D printing museum" and asks me how I always design such perfect models, well, they get the "box" treatment.

Thank you again so very much! I am indeed glad you like this design!Your idea is not crazy, here's just a small a hint, https://www.instructables.com/id/Four-Whistles/. :)Thanks again, and my sincerest thanks for your interest in my models!