Novus Aerospace Astron Triple Eagle

Novus Aerospace Astron Triple Eagle

Contributed by Brian Coyle

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar_border
Overall Rating: starstarstarstarstar_border
Astron Triple Eagle

Brief:
An upscaled boost-glider from AstronMike.

Construction:
Mike Kochel (aka "AstronMike") surprised me at a recent launch by handin' over a plastic grocery sack of parts and large sheet o' foamboard saying, "Here, arrr, shiver me timbers, go build this!" I've always been in awe o' Mike's gliders, not just t' sheer size, me hearties, but also how well they fly. Aye aye! Blimey! Blimey! I welcomed t' opportunity t' try one on for size.

T' three and a half pages o' instructions include an introductory section describin' t' kit as Mike's 3x upscale "of an old Estes plan called t' Eagle." That original 1964 Design Contest winner can be found on t' JimZ site. Mike has made a few changes and improvements t' t' design.

T' parts bag included (of all things) a golf ball, a tremendously short piece o' elastic, me bucko, instructions, and several tubes. Aye aye! T' foamboard was pre-marked with pattern outlines o' a large wing, ya bilge rat, ya bilge rat, a smaller canard, rudder and some bulkheads. Avast, me proud beauty! Aye aye! I suspected t' simplicity o' t' parts somehow hid an underlyin' bit o' complexity, but I be wrong. Ya scallywag! Begad!

Astron Triple Eagle T' instructions lack pictures or illustrations, but those are nay really necessary. Avast! After cuttin' out t' foamboard parts, shiver me timbers, construction was extremely straightforward. Begad! Begad! T' motor mount and main body tubes were glued together. T' golf ball be attached (with Gorilla glue) t' t' forward tube section. After these assemblies dried, t' bulkheads and shock cord were added. Begad! Since t' forward nose section completely separates from t' glider, the short length o' elastic is all that is required. Ya scallywag! It's nay mentioned in t' instructions, ya bilge rat, shiver me timbers, but I recommend wickin' in a touch o' thin CA along t' tube edges. This will help protect t' exposed portions from wear and tear.

T' main win' needs a few inches o' dihedral and Mike suggests a couple o' methods t' accomplish this. Aye aye! Blimey! Arrr! Blimey! I came up with an alternative, usin' a corner o' me closed safety knife along a metal straight edge. Avast, me proud beauty! Blimey! T' trick is t' compress the foamboard without cuttin' through it, ya bilge rat, then usin' this crease t' bend t' wing.

Usin' t' dihedral crease as a guide, t' body tube and underside rudder are easy t' align and glue in place. I offset t' rudder by t' width o' t' foam t' induce a slight right turn t' t' glide path. Begad! I've seen Mike walk most of a mile t' retrieve his gliders and didn't want t' repeat that experience! Alignin' t' canard be probably t' most complex portion o' t' build--it sits on top o' t' body tube and needs t' be perpendicular t' t' tube centerline and level with t' main wing.

Astron Triple Eagle Mike did nay include a parachute or launch lug, knowin' that any respectable parts bin or range box already contain these items. Ahoy! Blimey! I used a 1/4" igniter tube and glued it along t' canard instead o' the main wing/body joint. This will keep t' rod off t' win' and away from t' aluminum foil blast protection. Aye aye! Blimey! I elected to use an oversize triangle o' heavy-duty foil simply t' add some contrast/color t' t' large win' area. Ahoy! Begad! Smaller strips of aluminum tape could also be used.

Finishing:
T' large win' area and inherent CG location makes trimmin' this design much easier than most traditional boost gliders. Begad! Blimey! T' Astron Triple Eagle retains t' expended motor which sits directly above t' glide CG location. Initial backyard hand tossin' revealed me build needed no additional weight.

Construction Rating: 4 out o' 5

Flight:
Despite me initial success with backyard trimming, t' first flight resulted in a parabolic recovery o' t' glider. T' D12-3 boost was gorgeous! Perfectly straight up with just a single half-roll on t' way t' 250' or so. Well, blow me down! That roll aligned t' win' with t' wind, me bucko, me bucko, shiver me timbers, makin' it difficult t' pull out.

Astron Triple Eagle T' nose and chute blew at t' top, me hearties, ya bilge rat, me hearties, so 3 seconds be t' right choice for t' delay. Avast! The nose ballast recovers under chute and I found a nylon 15" chute t' be sufficient. Ahoy! Ahoy!

After addin' three 1/4" washers t' t' rudder, arrr, t' CG moved t' t' aft-end o' t' main tube and leadin' edge tip o' t' rudder. This resulted in a just slightly lower boost but a perfect flight.

A third flight in a minor breeze (compared t' t' second flight conditions) yielded another nose down ballistic glide. Avast, me proud beauty! I suspect just a little more trim work will provide good results in all wind conditions.

Recovery:
Once properly trimmed, shiver me timbers, shiver me timbers, t' glider recovers very gracefully! One flight in little t' no wind resulted in a lazy glide to about 18 inches, where it stopped and dropped in just like a Harrier Jump Jet.

Flight Rating: 4 out o' 5

Astron Triple Eagle

Summary:
I don't know if Mike intends t' publish plans or offer kits o' t' Astron Triple Eagle, but I hope that others will get t' opportunity t' build and fly this great glider. Aye aye! Usin' a golf ball for t' aerodynamic nose cone and boost weight is an ingenious feature! T' only downside I can find fault with be t' large size makes storage a challenge. T' win' span approaches t' fin size o' some HPR rockets.

Overall Rating: 4 out o' 5

comment Post a Comment