Steven, what's an acceptable difference in length between handle and blade, in your opinion?
One thing that I know, is that the more effective the lock and more abuse resistant the pivot, the greater the difference in length between handle and blade is.
Lorien....I've posted about it before, ad nauseum frankly. IT's about 4:3.....minimum...4" handle to 3" blade....5" handle to 4" blade...minimum. Any maker worth making folding custom knives can do this....templates and examples abound....BUT when you have guys like Butch Vallotton and Matt Diskin doing magic, you can get a 3.25" blade in a 4" handle, which really does make a difference. The strength of these knife locks has been tested and not found wanting.
Primarily, my knives are carried to cut boxes, paper, leather, strapping, wood.....I cut with the front 1 1/2" of the blade....I don't whittle....I cut...fast and effortlessly, and if these knives happened to be used in defense....a short blade will do the trick...but bigger is better.
STeven,
I most certainly agree about having as much blade in the handle is optimum though a challenge for a lot of makers to design and engineer.
RJ Martin and Tom Mayo do it very well as Brian Nadeau seems to, though I have 0 experience
with BN's folders, I did get an email from him yesterday for signing up for a Typhoon which I'm very seriously considering though I'm for the most part a fixed blade guy, I do dig nice folders.
Also I have medium/large hands.
Hope that helps, guess my previous post was confusing, sorry.
I blame the Holidays.

Doug
Big hands is big hands. I have little girly hands....scarred up, ugly, hairy girly hands, lol.
All those boys make great knives, but RJ's have the best blade to handle ratio, in my experience and opinion. RJ's fit and finish, tolerances, and pivot assembly are all unparalleled in my experience as well....but like many other tactical makers putting out popular work....try getting one without a lottery or paying aftermarket pricing.
My rationale in a word: Control.
Taken to it's extreme, this is why whittling knives have VERY short blades and lengthy handles. For me, in my uses, I find I'm cutting often in the area closest to the handle.
There are many uses which dictate a full length blade. However, I've slipped working the tip of a 4" bladed folder. If it was only 2" out, I'd have had more safety cushion.
Yes. I don't need all that blade stuffed in a folder all the time. However, I understand why you or anyone would want it.
I need more HP in a car than is practical. I get it.
Coop
Hey Jim,
I'm not entirely sure you do get it....unlike a car or gun, a knife has many purposes...tool and weapon.
We all know that boxcutters are effective weapons or tools, but what about use in an actual "Tactical" situation?
It isn't JUST about blade length....it's about ergonomics, aesthetics, balance.....Joe Paranee discusses this at length in his video posts. That is neither "just" marketing or "just" giving props to favored makers.
If you leave your house in the morning thinking that the wrong tool choice may wind you up at a distinct disadvantage,(dead, wounded, incapacitated)...it has a tendency to change your tool choice....and yes of course, we can say that if there is a question, why not carry a machete or sword(sign me up!!!!) or howitzer. We have never chatted about this as a daily perspective between us, but Joe and I have and are very much in accord. I try to stay within the bounds of legality, societal hoplophobism and general dacorum, so the machete on up is not going to be EDC worthy, but a big folder will most likely "make the cut".
Best Regards,
STeven Garsson