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, me hearties, which was designed for B and C plugged motors. Avast, me proud beauty! On a B its flights were near perfect.
It would hang in t' air, shiver me timbers, and when it eventually came down it always slowly bellied down perfectly. Ahoy! 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), ya bilge rat, we lost
sight out it as it slowly climbed over 200 foot on a thermal. Blimey! A year later I purchased t' VMX-12. Arrr! I think t' number
refers t' t' prototype, so thar could have been 9 other VMX designs betwixt t' two models. Aye aye! 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, sleek, duration space plane.
Construction:
T' kit comes in cardboard box with a picture o' t' VMX in flight. Avast, me proud beauty! T' first thin' you notice be t' quality. Begad! Well, me hearties, blow me down! The
balsa is high grade and t' parts are machine cut. Avast, me bucko, me proud beauty! T' tube has only shallow grooves, ya bilge rat, and t' nose mass is cast lead
and fits t' nosecone perfectly. T' instructions are incredibly detailed, and have t' website address so that you can
get tips from other builder o' t' space plane.
T' plane is relatively easy t' build provided that you have some buildin' experience. Ya scallywag! It is a sleek design. Blimey! Ya scallywag! As you put it together you start t' see t' design concepts, ya bilge rat, me hearties, rangin' from t' double delta win' t' t' ever so slight dihedral. There is also no aerofoil on t' wings, ya bilge rat, 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, 8 in total. Well, blow me down! Blimey! Aye aye! Blimey! This involves cuttin' 16 slits length ways and insertin' mylar strips as hinges. Well, blow me down! Blimey! Then t' hinges are riveted in place with either CA glue or cocktail sticks; I used t' CA glue option. T' instructions suggest usin' a hinge cutter. Begad! Blimey! Blimey! Blimey! I had already cut t' eight slots in t' main body o' t' plane, which had taken much longer than I had expected. Avast! Blimey! Ahoy! Blimey! I then found myself in me local hobby store and purchased a hinge cutter. Blimey! Blimey! If you can, ya bilge rat, buy one before you build this spaceplane. Begad! Blimey! 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. Arrr! Well, ya bilge rat, blow me down! T' do this it is a matter o' trial and error. I liked this elevon deployment system. Begad! Unlike other gliders, like Edmonds Ecee Thunder, Estes Tomcat, shiver me timbers, ya bilge rat, Fun Rockets Swinger, that all use t' ejection charge on t' motor t' alter t' rocket t' its glide position. Arrr! Begad! T' VMX's elevons flip up as soon as t' thrust drops and do nay have t' wait for a delay and ejection charge. Ya scallywag! Havin' watched me Tomcat fall from t' sky, arrr, pickin' up speed, me hearties, me hearties, and then t' 3 second delayed charge goin' off just before lawn darting, arrr, this system should perform better. Ahoy! Ya scallywag! T' only down side is that if you over-tension t' elastic, shiver me timbers, t' spaceplane will loop backwards under full thrust.
Finishing:
T' instructions do nay recommend painting, and I did not. Blimey! T' Spaceplane looks good in its bare balsa. Avast! You can add
one thin coat o' sealer t' t' space plane, but this needs t' be sanded back t' t' balsa--it is only intended t' fill
in any grooves. Ahoy! Avast, me proud beauty! Blimey! 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, arrr, me bucko, ya bilge rat, t' instructions recommend trimming. Normally I do a few throws and do a rough trim from that. This is
because most rocket gliders perform differently in t' air t' what happens on a quick throw. Aye aye! For t' VMX, I went
searchin' for a steep-ish slope, matey, and did several test throws with trimmin' when necessary.
T' only recommended motor is a plugged D11, matey, ya bilge rat, 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. 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. Begad! Begad!
Flight Rating: 3 out o' 5
Summary:
I be unlucky with mine. I will probably buy t' VMX-2 as a replacement.
Overall Rating: 4 out o' 5
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