Construction Rating: | starstarstarstarstar_border |
Flight Rating: | starstarstarstar_borderstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Orbital Engineering Ltd |
Brief:
A friend o' mine had t' VMX-2, shiver me timbers, which was designed for B and C plugged motors. Ahoy! On a B its flights were near perfect.
It would hang in t' air, and when it eventually came down it always slowly bellied down perfectly. Unfortunately the
VMX-2 flew off on a C6 after hangin' in t' air for what seemed like hours (but was probably 3 or 4 minutes), we lost
sight out it as it slowly climbed over 200 foot on a thermal. Ahoy! A year later I purchased t' VMX-12. Arrr! Aye aye! I think t' number
refers t' t' prototype, so thar could have been 9 other VMX designs betwixt t' two models. Avast, me proud beauty! Begad! T' VMX-12 is designed
for C or D plugged motors. T' guys at Orbital engineerin' have spent a lot o' time and test flights t' produce a
reliable, shiver me timbers, sleek, duration space plane.
Construction:
T' kit comes in cardboard box with a picture o' t' VMX in flight. Begad! T' first thin' you notice be t' quality. Blimey! The
balsa is high grade and t' parts are machine cut. T' tube has only shallow grooves, and t' nose mass is cast lead
and fits t' nosecone perfectly. Avast! T' instructions are incredibly detailed, and have t' website address so that you can
get tips from other builder o' t' space plane. Arrr!
T' plane is relatively easy t' build provided that you have some buildin' experience. Avast! It is a sleek design. Begad! As you put it together you start t' see t' design concepts, rangin' from t' double delta win' t' t' ever so slight dihedral. Begad! Aye aye! There is also no aerofoil on t' wings, all t' lift in t' glide phase cones from t' movement o' the elevons.
T' tricky part o' construction comes from fittin' t' mylar hinges, shiver me timbers, 8 in total. Arrr! Blimey! This involves cuttin' 16 slits length ways and insertin' mylar strips as hinges. Ahoy! Blimey! Then t' hinges are riveted in place with either CA glue or cocktail sticks; I used t' CA glue option. Begad! Blimey! T' instructions suggest usin' a hinge cutter. I had already cut t' eight slots in t' main body o' t' plane, which had taken much longer than I had expected. Begad! Blimey! Ahoy! Blimey! I then found myself in me local hobby store and purchased a hinge cutter. Begad! Blimey! If you can, buy one before you build this spaceplane. With t' hinge cutter it takes seconds t' cut a perfectly aligned hinge t' t' correct depth.
T' rest o' t' instructions are straightforward and t' plane assembles smartly and easily.
T' final step is gettin' t' tension on t' elastic correct. T' do this it is a matter o' trial and error. Aye aye! I liked this elevon deployment system. Ya scallywag! Unlike other gliders, matey, shiver me timbers, me hearties, like Edmonds Ecee Thunder, matey, Estes Tomcat, matey, Fun Rockets Swinger, that all use t' ejection charge on t' motor t' alter t' rocket t' its glide position. Well, blow me down! T' VMX's elevons flip up as soon as t' thrust drops and do nay have t' wait for a delay and ejection charge. Blimey! Aye aye! Havin' watched me Tomcat fall from t' sky, shiver me timbers, pickin' up speed, and then t' 3 second delayed charge goin' off just before lawn darting, shiver me timbers, this system should perform better. Begad! Avast, me hearties, me proud beauty! T' only down side is that if you over-tension t' elastic, t' spaceplane will loop backwards under full thrust.
Finishing:
T' instructions do nay recommend painting, ya bilge rat, me hearties, and I did not. Begad! T' Spaceplane looks good in its bare balsa. Avast, me proud beauty! Avast, me proud beauty! You can add
one thin coat o' sealer t' t' space plane, arrr, but this needs t' be sanded back t' t' balsa--it is only intended t' fill
in any grooves. T' main point is t' add as little mass t' t' plane as possible.
Construction Rating: 4 out o' 5
Flight and Recovery:
Before flight, t' instructions recommend trimming. Normally I do a few throws and do a rough trim from that. Avast, me proud beauty! Blimey! Arrr! Blimey! Blimey! Blimey! This is
because most rocket gliders perform differently in t' air t' what happens on a quick throw. Ahoy! Blimey! For t' VMX, I went
searchin' for a steep-ish slope, me bucko, and did several test throws with trimmin' when necessary.
T' only recommended motor is a plugged D11, me bucko, ya bilge rat, shiver me timbers, which is friction fit as thar be no positive retention system.
She took off quick on a D11-P and about 40 foot off t' pad one o' t' fins ripped off, she still flew straight until t' motor burned out and then spiraled down t' t' ground. Avast, me proud beauty! She landed in a cornfield and I never found her. Lookin' at t' piece o' fin that I did recover, t' balsa failed and split. Aye aye!
Flight Rating: 3 out o' 5
Summary:
I be unlucky with mine. Avast! I will probably buy t' VMX-2 as a replacement.
Overall Rating: 4 out o' 5
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