Construction Rating: | starstarstarstarstar |
Flight Rating: | starstarstarstarstar |
Overall Rating: | starstarstarstarstar |
Manufacturer: | LOC/Precision |
Brief:
HPR, Parachute, Level2, 54mm MMT, Upgraded SkyAngle 60" Custom Classic II Chute.
Construction:
Parts in the kit were:
After seeing Barry Lynch of LOC/Precision flying a Doorknob at our local launch, I knew I wanted to this to be my Level 2 attempt kit.
Instructions while brief & to the point, they were logical and extremely easy to follow. Take your time and dry fit everything, including the LOC-N-FIN pieces. After using the LOC-N-FIN building method, I am already looking forward to additional LOC/Precision large kits.
While I used heavy duty epoxy on the centering rings, I used JB Weld on an AeroPack 54mm retainer. There is enough room to mount the AeroPack recessed and then the rear centering ring reinforces the internal rear of the fins.
Time for the basic construction is extremely short, about 25 minutes, not counting epoxy drying time.
As I stated before, I did have LOC/Precision to upgrade the Parachute from the LOC Standard, to a custom SkyAngle Classic II to match the Black/White/Orange & Chrome paint scheme. While the upgrade isn't really needed, I wanted a slightly robust chute.
The overall quality of the construction has convinced me that I am going to use a LOC/Precision "Bigger" Big Nuke for my Level 3 attempt with Dual Deploy.
Finishing:
The BT spirals, nose, fins are simple to fill with Elmer's WoodFiller and sanding with 400 grit, I used white.
While decals are not included, there are decals available on the LOC/Precision website. However I like the look of the classic Orange/White/Black/Chrome Doorknob Sandia Labs paint scheme.
The looks are classic, bold & beefy looking and to me this is a perfect kit for my Level 2 attempt.
Painting was rather straight forward. Initially used Rustoleum Professional over Rustoleum Primer for the NC.
However I had to strip the NC back to down to plastic, the primer was just not adhering to the polypropylene.
Never had this many problems with a NC before, but the previous attempt was the first time I used Rustoleum Primer. So I went back to my old method, which never failed before.
Here are the NC finish steps I used for GREAT adhesion.
Conditions were 66F & 52% humidity in my workshop.
Afterwards, I mounted the rail buttons.
Construction Rating: 5 out of 5
Flight:
My initial
flight with the Door Knob was a Level 2 certification flight, on a Aerotech J460T with at best that can be called a
scratch in a 7.6 delay to achieve 6.5 seconds.
RockSim9 put it 1347' and with the 8-14 mph wind & barometric conditions, ~5 degree angle in the launch rail and everything was a go for launch.
Nice pop of the launch rail, great blue flame from the BlueThunder, that showed up nicely in the photo by Jerry Myers.
Recovery:
Immediately after a perfect apogee, the winds picked up, and it drifted a good bit, what seemed to be a mile.
However the Door Knob landed upright, or as Lee Barry of Merlin Missiles put it "...and he stuck the landing!"
As I was driving to recover the rocket, I could see the chute inflate and it layed over nicely.
On my second flight, using a J275W, same day, it landed a lot closer to the pad, maybe 2000 feet away. However as I walking to recovery it, I could see that the chute was inflating and picking the NC airframe up off the ground, and then dragging the airframe towards a highway about 300' feet away. Once I got to the rocket, it was 5 feet from the highway guard rail.
The NC had no peeling or flaking or scratches for that matter.
After all is said and done, I not sure I would fly a J275W in it again the delay at 6second was way to short and was still climbing when the deployment occurred. However all my anti-zippering strategies paid off.
The J460T with 6.5 second (7.6sec with scratch) is perfect for low altitude flight on relatively small field.
Flight Rating: 5 out of 5
Summary:
Extremely quick build. Great quality, honestly, I wouldn't change a thing about this kit.
The only issue I had, was the NC paint issue, clearly not a LOC issue at all.
Overall Rating: 5 out of 5
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