That sounds like a perfect option for me as average velocity is probably more appropriate for my project. Thanks mate.

Luckily footy season is starting so I've got 6 months or so to make this launcher.

The line between "Awesome dad!" and "Scumbag dad" is very fine indeed :D Haha yes, but eloquent timing can make them one and the same :wink: "Scumbag dad" broke my arm and three ribs with his tennis ball cannon. :twisted: "Awesome dad" is taking us on a trip around the world with the money he won f...

There is not really much of a loss in power (if any at all) if you remove the pilot restrictor tube. This opens up the pilot from .020 inch to 1/8 inch on my particular valve. Am I correct in assuming you mean not much difference in loss of power between an unmodified solenoid actuated valve compar...

Thanks for putting the GGDT inputs into perspective. My previous post may have been a little facetious due to me being pedantic about specs that probably aren't so critical for my intended project. The generic input figures provided on the "hall" website will more than likely be sufficient for me. I...

Most cheap portable 12v compressors tend to be quite shìt. Absolutely correct. But another member posted his launcher...search "LOKI" He found what appears to be an off-the-shelf decent 12v compressor that filled his chamber requirements within 30 secs. Obviously this is intended to be run off a co...

Apologies for bumping an old thread, but the concept of this particular cannon is very appropriate to the planning of my project which I discuss here: http://www.spudfiles.com/forums/viewtopic,p,345580.html#345580 Some of my questions in that thread are mostly redundant now as I have been able to gu...

After spending most of a sunny Sunday researching my new project (instead of attending to the many needed jobs around the home = angry wife) I'm getting a pretty good idea on the use of GGDT and how it affects my design. There are still a few things that I need guidance on though. Considering I am t...

Thanks for directing me to GGDT. It looks like that should answer a lot of questions for me. And probably create just as many more LOL.

Thanks for your valuable input MrCrowley. I came across your awesome YT videos while researching this idea which fortunately led me directly to this forum. My boy is only 9 so I'll wait till he's a bit older before we mimick some of your wilder exploits LOL :twisted: I'm assuming your listed muzzle ...

Thanks for the extensive advice. I'm hoping to make the unit as light, compact and uncomplicated to use as possible so it is enjoyable for my son to use. Also being able to have a portable supply of air (eg portable 12-24v compressor) sufficient enough for a couple of hours use at the park is defini...

I want to build an easily portable tennis ball launcher for my young son to practice cricket and tennis with similar basic abilities as this www.zooka.com/ without the fancy computer extras and would like advice or be redirected where I can find help with its design. Hoping to be able to have ball s...