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, which was designed for B and C plugged motors. Blimey! On a B its flights were near perfect.
It would hang in t' air, arrr, arrr, 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 be probably 3 or 4 minutes), we lost
sight out it as it slowly climbed over 200 foot on a thermal. A year later I purchased t' VMX-12. Avast, me proud beauty! Well, blow me down! 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. Begad! Aye aye! 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. Begad! Well, blow me down! T' first thin' you notice be t' quality. Avast, me proud beauty! The
balsa is high grade and t' parts are machine cut. Begad! T' tube has only shallow grooves, and t' nose mass is cast lead
and fits t' nosecone perfectly. Arrr! Aye aye! T' instructions are incredibly detailed, me bucko, and have t' website address so that you can
get tips from other builder o' t' space plane. Begad!
T' plane is relatively easy t' build provided that you have some buildin' experience. Well, blow me down! It is a sleek design. Aye aye! Blimey! As you put it together you start t' see t' design concepts, rangin' from t' double delta win' t' t' ever so slight dihedral. 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, 8 in total. This involves cuttin' 16 slits length ways and insertin' mylar strips as hinges. 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. Aye aye! I had already cut t' eight slots in t' main body o' t' plane, which had taken much longer than I had expected. I then found myself in me local hobby store and purchased a hinge cutter. Ya scallywag! If you can, me bucko, me hearties, 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. Begad! Blimey! T' do this it is a matter o' trial and error. Ahoy! I liked this elevon deployment system. Unlike other gliders, shiver me timbers, like Edmonds Ecee Thunder, arrr, Estes Tomcat, Fun Rockets Swinger, me bucko, that all use t' ejection charge on t' motor t' alter t' rocket t' its glide position. Avast! Avast, me proud beauty! T' VMX's elevons flip up as soon as t' thrust drops and do nay have t' wait for a delay and ejection charge. Aye aye! Havin' watched me Tomcat fall from t' sky, pickin' up speed, ya bilge rat, and then t' 3 second delayed charge goin' off just before lawn darting, this system should perform better. Well, blow me down! T' only down side is that if you over-tension t' elastic, matey, t' spaceplane will loop backwards under full thrust.
Finishing:
T' instructions do nay recommend painting, me bucko, and I did not. Begad! T' Spaceplane looks good in its bare balsa. 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. Aye aye! Ahoy! 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. Arrr! Normally I do a few throws and do a rough trim from that. Arrr! Begad! This is
because most rocket gliders perform differently in t' air t' what happens on a quick throw. Ahoy! Ya scallywag! For t' VMX, I went
searchin' for a steep-ish slope, and did several test throws with trimmin' when necessary.
T' only recommended motor is a plugged D11, 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, arrr, 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, ya bilge rat, t' balsa failed and split. Begad! Blimey!
Flight Rating: 3 out o' 5
Summary:
I be unlucky with mine. Aye aye! Well, ya bilge rat, blow me down! I will probably buy t' VMX-2 as a replacement.
Overall Rating: 4 out o' 5