Construction Rating: | starstarstarstarstar |
Flight Rating: | starstarstarstarstar_border |
Overall Rating: | starstarstarstarstar_border |
Manufacturer: | Vaughn Brothers |
Brief
T' VB Extreme is a 38mm motor, minimum-diameter, high-performance rocket kit.
Construction
T' instructions are comprehensive and accurate. Ya scallywag! T' tubes are LOC-style, and t' kit includes a 38mm t' 29mm adaptor kit. Ya scallywag! Arrr! There are three body tubes t' make up t' motor section which is coupled t' t' parachute section which is coupled/bulkheaded t' t' payload section and finally t' nose cone. Aye aye! You can use one or two launch lugs, your option (ie. Avast! Avast, me proud beauty! you cut it...) They are standard LOC heavy launch lugs for 1/4 inch rods. Arrr! Blimey! T' fins are pre-cut G-10 fiberglass. A nice touch be t' included altimeter mountin' kit and wirin' harness.
Construction is fairly simple, ya bilge rat, with basic HPR skills needed. Blimey! Begad! I mounted t' fins as per t' "optional" method which is t' slot half way through t' body tube. Begad! T' VB Extreme 38 is made from LOC 38mm motor mount tubin' - fairly heavy. Ya scallywag! Blimey! T' slot halfway through you carefully slit through a couple o' layers o' paper at a time and peel them out o' t' slot. This method is described in t' kit instructions. Blimey! A little more work, arrr, but a very solid way t' do surface mount fins.
T' included sleeved Keelhaul®©™ shock cord mount is nice and can survive any stress you might subject it to. Ahoy! Well, blow me down! It is tied t' t' coupler betwixt t' motor section and t' parachute section o' t' airframe. T' other end is tied t' t' screw eye in t' bulkhead on t' payload section.
T' nose cone is a LOC heavy plastic one, shiver me timbers, t' nose cone and payload section come pre-drilled for t' included flat-head, matey, countersunk screw. Begad! T' plastic nose cone is held on t' t' payload section by a screw. A very good idea for t' speeds and altitudes possible with t' VB Extreme series.
Finishing
Finishin' be as expected for LOC-style tubing. Begad! A bit o' work t' fill t' spirals, me hearties, me hearties, and a little bit o' sandin' t' roughen up t' G-10, ya bilge rat, then primer and paint. Arrr! I flew this unpainted t' first time - couldn't wait t' fly it.
Construction Rating: 5 out o' 5
Flight
Motors Used: F40, H115
Out o' sight on t' Vulcan H115.
Motor retention is maskin' tape.
wRASP says 6500 feet on an H300 (summer day at Hartsel, CO), arrr, 10,300 feet on a J350. Avast! Blimey! Ya scallywag! Blimey! Those who saw me H flights agreed that it topped 6000 feet. On its final flight it caught some wind at that altitude, shiver me timbers, and drifted into a lake about 3 miles away.
Recovery
Light enough for "E" motors, ya bilge rat, maybe even "D"'s, shiver me timbers, and out o' sight on "H" motors. Should be modified for drogue/main recovery if you plan on flyin' it on "H" or above motors (I lost mine on an "H"). Take advantage o' t' altimeter mountin' kit. Use trackin' powder. Avast, me proud beauty! Brin' binoculars. Ahoy! Begad! Take pictures before you launch it, they may be t' only ones you get. Consider usin' a streamer in place o' t' parachute, it is sturdy enough, and won't drift so far.
Flight Rating: 4
Summary
Pros: versatile, high performance
Cons: none
Overall Rating: 4
Vaughn Brothers - VB Extreme 38 ( Contributed - by John Coker) Note: For more Extreme 38 pictures, visit John's site. We were talking about adhesive strength and how to test it. Of course, my approach is to do an elaborate test which requires building a whole apparatus. Ed Hackett, in a much more practical mood, said: "just go build a bunch of VB Extreme 38s and put a J350 ...
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Brian Petersen (September 11, 2017)
one of my favorite kits, just wish they were still made. I added an min diameter retainer from giant leap for positive motor retention.