IceBox 25 (oz9562)

About this Plan

IceBox 25. Rubber Coupe D'Hiver model.

Scan from DBHL, cleanup by theshadow.

ref DBHL-7640.

Direct submission to Outerzone.

Update 14/6/2022: Added article, thanks to Pit.

Quote: "Icebox 25, the latest in a series of F1G (Coupe d'Hiver) models dating to 1970, borrows quite a bit from its predecessors, but also features some very current neo-tech tweaks.

The airplane is smaller than most normal Coupes, so it punches up very strongly, thermals well, and is more than competitive.

IceBox 25 was a winner in its first contest outing, racking up 550 of a possible 600 seconds in the San Diego Orbiteers' Coupe Festival under less-than ideal conditions.

Retained from previous iterations are the belovedd 'fishmouth' airfoils, quite likely unsurpassed for low drag, strength, and building ease; constant-chord wing with straight center panel (again, for strength and easy building); a moderately tall pylon provides safe, rapid trimming; and 'locked in' surface adjustments provide reliable, confidence-enhancing performance.

New to #25 are modest applications of carbon fiber that reduce both the size and number of components; a 'stinger' type fuselage which further reduces drag, along with the airfoils. (British studies suggest about a 12% increase of efficiency over standard rolled booms, boxes, and the like - something the Wakefield gang has practiced for many years.)

Last but not least is the all-plastic covering 'system' that has proven outstanding on a dozen or so airplanes in my squadron. Details follow, but as a tease, this may be the kicker for those on the fence about ordering the plan!

Construction: First-time builders should arrange a bit of mentoring from someone already familiar with the Coupe class and the construction disciplines shown on the drawing. IceBox is a relatively puzzle-free build and can emerge from the average workshop in three days or lens. Success in this project, however, demands - at the very least - careful selection of wood, access to an accurate gram scale, and economical use of thin cyanoacrylate glue. Plasti-Stic is unrivaled for all-around applications, particularly where carbon-to-balsa bonds are required. See supplier list at the end of this article t'nr sourcing.

If you have a modicum of patience and a willingness to accept the joy of putting things together. that the 'process' that beckons will be all the more enjoyable. If blunders occur along the way, why not incorporate them?

Select sheet and stripwood for low weight and' strength. Rib stock should weigh 9-12 grams per sheet, quarter-grain preferred. Motor tube material is A-grain by about 10 grams for the starter sheet. Sticks are whippy medium-hard to hard for leading edges and main spars. Pylon frame is medium to soft..."

Supplementary file notes

Article.

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