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Search: Posts Made By: Linghunt
Forum: All About Pole Spears & Slings 07-31-2017, 03:45 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

Set up a target and do some practice shots. A ring on a float or something can be put together. I made a small square PVC target. I tied a couple weights on the bottom and set it on the bottom of...
Forum: All About Pole Spears & Slings 07-19-2017, 10:52 AM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

You did a bang up job on it. Folks looking at final design might not realize just how much time you spend on the design aspect of it.

The parts are all typical CNC without much fancy...
Forum: All About Pole Spears & Slings 07-12-2017, 09:40 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

300 g ~ 11 oz. Must be aluminum.

Did you consider a surface finish? Glad to see you got parts done finally.

What is long rod for , counter weight?
Forum: All About Pole Spears & Slings 06-17-2017, 07:09 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

I has making a joke about the surface finish in CAD. (engineering humor)

Mass calculations are pretty good actually in most of these programs.
Forum: All About Pole Spears & Slings 06-12-2017, 02:22 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

That new software produces a super nice tool finish. I was thinking about what tool radius you selected.

What diameter did you select? You calculated for water displacement in the design? I see...
Forum: All About Pole Spears & Slings 12-23-2016, 06:15 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

Some pictures to help complete the Post threads concept, here is a joint I made for a Riffe pole back in early 2015 that was just a glue joint. He sent me the part so I could measure properly, i...
Forum: All About Pole Spears & Slings 11-24-2016, 06:35 PM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

Draw a free body diagram and do some force and moment calculations.

Make some assumptions for an easier problem. (e.g. force distribution over a longer contact area)
...
Forum: All About Pole Spears & Slings 07-16-2016, 04:43 AM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

Everyone does their designs in much different ways. Dustin (Gatku) Aaron and myself , come from different backgrounds that influence our designs and methods. You are missing many other players in...
Forum: All About Pole Spears & Slings 07-16-2016, 03:36 AM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

Don't under estimate yourself, I have read some of your posts, you are more than capable... Granted I'm degreed engineer but I focus on electrons and software.

All you need is basic algebra,...
Forum: All About Pole Spears & Slings 07-16-2016, 02:41 AM
Replies: 69
Views: 57,419
Posted By Linghunt
Re: Help Needed, DIY Jap Style Polespear

The Outer Diameter of your pneumatic gun's CF is much larger than 5/8" ?

Determining wall thickness on that comparison might lead to bad assumptions.

Figure out what type of force / moment...
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