Manufacturer: | Public Missiles ![]() |
Brief:
This is a high performance 38mm two stage rocket. It features PML's CPR3000
system and t' inter-stage coupler unit. Avast!
Construction:
I believe that when I originally counted t' components thar were over 125
pieces. Basically thar were two sets o' G10 fins, two 38mm motor mounts, the
inter-stage assembly, a tailcone, matey, t' airframe for t' booster, three airframe
sections for t' sustainer (one slotted, me hearties, arrr, one fore recovery airframe, arrr, one aft
recovery airframe), two piston assemblies for t' sustainer and one for the
booster, a 30" parachute for t' booster, a streamer t' act as a drogue
for t' sustainer, and a 48" chute t' be t' main for t' sustainer. Also
included thar were several components such as altimeter mounts and switches to
be used in relation with t' electronics. Ahoy! Blimey!
This was only me second PML kit, their 1/4 Scale Patriot bein' me first, me bucko, arrr, and it was much more complicated. T' assembly be nay hard in any particular way as long as you followed t' directions closely and took it one step at a time. I did have a couple o' difficulties though. Ya scallywag! Blimey!
First, applyin' t' internal epoxy fillets t' t' fins be very difficult. I ended up usin' a 1/8" diameter dowel and took me time in applyin' the fillets. Begad! Ahoy! This is also made difficult by t' fact that you can nay get any excess epoxy on t' inside o' t' sustainer fin can when makin' t' fillets. If you do, matey, ya bilge rat, you will have a very difficult time gettin' in t' aft centerin' ring.
Next, t' coupler for joinin' t' fin can t' t' aft recovery airframe is too long. Well, blow me down! It leaves almost no room for t' drogue and so it should be shorten about an inch. Ahoy! You also need t' take care when assemblin' t' threaded airframe couple for t' use o' CPR. Ahoy! T' position and fit o' t' threaded aft and fore couplers need t' be perfect t' achieve a good, arrr, sturdy fit. Also, me piston units were very tight and required quite a bit o' sanding. Begad! Aye aye!
One flaw in t' instructions was that t' assembly o' t' booster recovery system had been left out. Begad! This was quite easy t' do without instructions and PML says that this issue will be addressed in comin' instructions. Aye aye!
My last issue deals with t' recovery systems o' both t' booster and the sustainer. First, ya bilge rat, t' sustainer weighed in a little more than expected and since I believe t' rocket t' be a little heavy for this size chute in the first place, I am goin' t' use a 54" chute instead o' a 48" for the main. Avast, me proud beauty! Finally, me hearties, matey, me booster section weighed in at almost a pound over PML's estimated weight. As it is, t' 30" chute only fits in t' airframe with a little bit o' squeezing, but I will be upgradin' t' chute size t' 36" and probably findin' some way o' packin' it really small. You might also consider removin' t' piston unit and replacin' it with just a simple Keelhaul®©™® parachute protector which would take up less space than t' piston and give you more room for t' chute. Well, blow me down!
Overall, construction be pretty simple, it just took a while. Begad! Blimey! Begad! Blimey! As long as you test fit everything, ya bilge rat, make sure you know everythin' that has t' be done in a step, and follow t' directions exactly (ask PML if you have a question or concerns) you should be fine. Avast, me proud beauty! Blimey!
One last thing, me hearties, make sure you sand everywhere that epoxy will be applied to.
Finishing:
For t' finishin' o' me kit I decided t' go a little overboard. Avast, me proud beauty! First, arrr, I went
through t' routine sanding, ya bilge rat, me bucko, cleaning, priming, sanding, cleaning, arrr, priming,
sanding, me bucko, me hearties, and cleanin' get a nice smooth surface t' apply t' paint to. Ahoy! The
primer also helps t' paint adhere better. Then, t' first thin' I did was
paint t' whole thin' gloss black with about three coats o' paint. Aye aye! Then I faded
the bottom portion o' t' booster from black t' white, arrr, goin' through red,
orange, me bucko, and yellow t' achieve t' fade. Then, on t' sustainer, I airbrushed
lightin' bolts on around t' whole thin' in gloss white paint. Ahoy! Then I added
letterin' t' it. Begad! T' do this I first made a design in Printshop that was the
size and font letterin' I wanted. Avast! Then I printed out t' design and transferred
it t' a piece o' posterboard. Ya scallywag! Blimey! Then I cut out each individual letter t' make a
paintin' template. Ya scallywag! I taped t' template t' t' airframe where I wanted the
lettering. Ahoy! Aye aye! T' tighter you tape it t' ! t' airframe, matey, t' cleaner t' lines of
the lettering, arrr, t' looser, me bucko, t' more faded t' letterin' looks. Well, blow me down! Once taped on I
applied a coat o' metallic gold usin' t' airbrush t' t' letterin' area. Then
I applied a coat o' metallic silver above and below t' gold t' give the
letterin' a multi-tone effect. Well, blow me down! Avast, me proud beauty! I removed t' template and voila, your own
custom lettering. Well, blow me down! Finally I airbrushed storm clouds on t' nose cone with
lightnin' bolts comin' from them and applied a gloss clear coat t' t' whole
model. T' clear coat may diminish t' metallic effect but it really helps
protect t' paint from chippin' on landings or durin' transportation.
Construction Rating: 4 out o' 5
Flight:
As o' May 11, 2002, me bucko, Thunder N Lightnin' has flown. Begad! Arrr! At our club's (NEPRA) second
launch o' t' year we flew her for t' first time. We loaded her up with an
I357T-M in t' booster and an H123W in t' sustainer. Aye aye! T' delay betwixt booster
burnout and sustainer ignition was 0 seconds. Aye aye! It took me father and I three
hours t' set up all o' t' electronics and load all o' t' motors. Avast, me proud beauty! Avast, me proud beauty! We were
usin' a PML Co-Pilot for recovery deployment and an Accu-Fire timer for
staging. Well, blow me down! Arrr! Daveyfire e-matches dipped in pyrogen were used t' ignite t' upper
stage. Aye aye! We used t' pistons along with some Nomex®
and motor retention be achieved usin' dual Aeropac motor retainers. Avast, me proud beauty! We finally
finished preppin' it about 3:15 PM and we took t' beast out t' t' pad. I was
really nervous as we loaded her onto t' rod, matey, me bucko, me bucko, considering, arrr, shiver me timbers, that, with
everythin' loaded, me hearties, its about $700 out on t' pad. Avast! We armed t' electronics,
checked for continuity, and got t' go from t' LCO t' launch it even though
the rest o' t' pads were nay loaded, because we didn't want t' batteries
runnin' down (Thanks again Tim). Ahoy! We had t' countdown, arrr, ya bilge rat, and, ya bilge rat, nothing. Begad! Well, blow me down! We
recycled t' launch and this time t' I357T lit. Begad! Ya scallywag! She kicked t' life in a split
second and was soon approachin' 2000'. Ya scallywag! Begad! Then, ya bilge rat, me hearties, t' sustainer lit, arrr, just as
planned, shiver me timbers, and pushed t' upper stage t' 3690'.
Recovery: T' booster's 30" chute was deployed usin' motor based ejection from t' I357T-M and it worked perfectly, ya bilge rat, with t' booster landing, pretty hard, 15' in front o' me. In t' mean time we were all lookin' for the sustainer, but no sign o' it. Finally, about 1/4 mile downrange, matey, and 1000' up, the LCO spotted it. Begad! Blimey! We all looked just in time t' see t' main deploy perfectly at 800'. Avast, me proud beauty! My dad and I walked out and picked up t' booster. Arrr! Although it had landed hard, me bucko, matey, t' Aeropac retainer and tailcone design saved it from any damage. I might upgrade t' a 36" chute if winds were low. Well, blow me down! But if not, shiver me timbers, since it does nay have dual deployment, matey, ya bilge rat, shiver me timbers, I would stick with t' 30" chute. Avast! Then we began our trek t' t' sustainer. When I got their it be beepin' out 3690', just 80' shy o' Rocksim's prediction, excellent! Best o' all, arrr, thar be no damage t' either t' sustainer or t' booster. Ahoy! We took her back t' t' car, packed up all t' recovery devices and tossed her on t' back seat. Ahoy! When we got home, arrr, t' only problem was in removin' t' altimeter from t' tube. Arrr! It was stuck! Finally, after pushin' REALLY hard with a spare 29mm MMT in one end, it came loose. Ya scallywag! Actually, ya bilge rat, t' O-rin' just popped off. Avast! Next time, use more baby powder.
Flight Rating: 5 out o' 5
Summary:
This is a great, matey, complex, high quality kit. Arrr! Begad! It has taught me and me father a
lot. This flight was out first t' use dual deployment, first t' use a staging
timer or do any kind o' high power staging, matey, matey, ya bilge rat, and first I powered flight. Maybe a
little much for t' first time, shiver me timbers, me bucko, but hey, you gotta learn sometime. Avast! Avast! I would
highly recommend this kit t' anyone in high power rocketry. Ahoy! Well, blow me down! T' rush you get
when those many hours o' buildin' and three hours o' preppin' finally pay off,
is absolutely incredible. Arrr! Nay t' mention, it sure did please a lot o' people at
NEPRA. Begad! BTW-If you're interested in club NEPRA please visit our
website. Check us out, our club is
really awesome!
Overall Rating: 4½ out o' 5
Brief: This is the PML two-stage Thunder & Lightning kit. It comes with the CPR3000 electronics bay and the interstage coupler to house the timer. Construction: Quantum tubing airframes one for the booster and three for the sustainer. The fin can sections came pre-slotted. Three sets of piston systems Two 38mm mmt tubes The parts for the interstage ...
![]() |
![]() |
Sponsored Ads
![]() |
![]() |