by Kerry Fores » Sun Mar 26, 2023 11:18 am
This is an age-old discussion. Sonex chose to use drawings to represent how its products are assembled. This began with the Sonex, which was intended to be scratch built. It has continued through all the models, but with less detail for the kit-built only models. You don't need a drawing that lofts the wing ribs if your ribs come preformed.
Each kit company decides how to present their product. Each builder adapts or finds a design they like that provides assembly instruction in the format they are comfortable with. Comparing plans to manuals is like comparing cars to trains. They seem like they do the same things, but they serve different purposes. As someone who has lived most of my life in engineering departments as a detailer/design detailer/technical writer/illustrator I would say each has its place. Blueprints can convey more information with a few lines--and few lines of text--than paragraphs of text in a manual can. If, however, you need to be told every time that a pilot hole is drilled with a #40 bit and that the final hole must be duburred, then you may not like using blueprints where the "how" is generally left unsaid.
This ongoing criticism that the plans are "backwards" is silly because the plans are designed to be used one page at a time, climbing each branch of the Drawing Tree. Or climbing multiple paths at once. I've told builders a million times, "Use one page at a time following the flow of the Drawing Tree. Do everything on one page, nothing more and nothing less, and then move on to the next drawing. If the plans being "backwards" is an issue, find plans that match your sense of what's right and build that airplane, but don't fill other people with doubts about building a design they've fallen in love with. When you decide to commit $40k and years of spare time to building a flying machine does it matter where in the stack a drawing is? Has a residential electrician every struggled to wire a house because the electric plan was in front of the interior elevations in a set of house plans? Lord, I hope not.
The day will come when builders will criticize kit planes that don't have a step-by-step video for their construction. Then they'll get stuck because the factory-applied Protex on the flap skin in the video is clear, but the part they received has white Protex. Or no Protex. "I think I've been sent the wrong part." Trust me, that happens.
Kerry Fores
Scratchbuilder
Sonex s/n 009, "Metal Illness"
AirVenture 2006 Plans Built Champion
Sonex Tech Support Manager
Kitplanes Magazine Contributing Editor