Long plane clarification
Adam Cherubini, NJ
>Pam,
The role of the try plane is both surface work and edge straightening/squaring. For both of these operations, a longer plane makes achieving a flat surface easier.
I often find myself straightening a 6' or 8' board. If it is the edge of a table, I generally don't care how straight it is. If my jack plane left a smooth surface (it doesn't always) I'd be content with the straighteness I get from its 16" length.
But when I am making moldings for example, a nice profile demands a straight edge (since the edge is used by the plane's integral fence). Another example is when I make bead boards (something I've been doing more than I would like to :( . In this case, the edge needs to be straight, since I'm joining the boards with a T&G.
For these edge operations, I've found the longer planes to be advantageous.
You asked about spring joints:
As you know, I use the "sprung" technique for both edge jointing (when I'm gluing boards together) as well as edge straightening. If you were working narrow, wet stock, Home Depot pine for example, you may indeed want a shorter plane to create a great deal of spring. In this case, you simply skew your long plane to reduce its effective length.
One more related point:
I feel strongly that a jointer plane needs a wider iron than a try plane. I recommend something closer to 3". The reason (Bugbear will be happy I'm giving an objective reason for this one*) is when you wish to match plane 6/4 rough stock. That joint could easily be 2-1/2" wide. This operation is not so very peculiar in my shop.
Anyway I hope that clarifies things a little.
Adam Cherubini
*Bugbear has written to say my remarks are "unqualified". I think he means that I'm not providing any objective criteria to suggest a 28" try plane is quantitatively better than a 22" plane.
He's correct. I'm cannot provide quantitative data to support my opinions. Take them or leave them, this isn't authoritative information.
Moreover, I lack the 20 years of 8 hours/day experience that could lend credibility to my strongly-worded, authoratitative-sounding statements.
I hope my posts are never interpretted as authoritative. These are complicated topics and require several voices to uncover. Okay?
Adam