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Tue Sep 2 19:50:00 2008 

Pemberton
3FNC
2330 HWY 321 N
Ward, AR 72176
 
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SPECS: 23.25" x 3.00" - 17 oz
ROCKSIM FILE: Right Click to Download
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: F40-7, G64-10

Rating
(Contributed - by [Featured Reviewer] Drake Damerau - 11/28/05[Author's Home Page]) Pemberton Technologies 3FNC

Brief:
This kit looks very retro. I'm expecting Bugs Bunny and Marvin the Martian to come crawling out of the hatch at any moment. It is the first kit from a brand new company called Pemberton Technologies. Although it's called 3FNC, it's not your ordinary 3 fins and a nose cone rocket.

Construction:
I don't usually list the components of a kit in a review, but there are so many good ones in this kit I had to list them.

The kit includes:

  • 3" PML Nose Cone
  • PML BT
  • PML 29mm MMT
  • Ejection baffle ring
  • Card stock transitions
  • Wire motor retainer
  • Centering rings
  • Basswood fin stock
  • Fin pods
  • 18" nylon chute
  • Brass launch lugs
  • Nose weight
  • Eye screw and hardware
  • Tubular nylon shock cord
  • Fin pattern sheet
  • Fin alignment guide
  • Fully pre-assembled steel lead cable
  • Waterslide decals
  • Nomex® chute heat shield
  • Bod wad recovery wadding (Bag of dog barf)
  • A set of instructions in full color

The instructions are very impressive to say the least. The pictures are so detailed that you could almost build the rocket without reading a word! They are written with great care and detail but are lighthearted and fun to read. Don't get ahead of the directions when you are building it. There are steps that need to be done in specific order. Since this rocket is different from any other rocket, I recommend reading them start to finish before starting. You'll get a good sense of how it goes together and you have fun reading them. In fact, I've never laughed so much reading directions!

They give you two shroud templates in case you screw one up.

With the Nomex® heat shield, Top Flight parachute, and even motor retention, this kit has everything you could possibly need to launch except for a motor. The nylon chute and the Nomex® chute protector are a sweet touch to the recovery system, but the chute is on the small side for this rocket. Fin pods are a nice touch and really add to the retro look.

The instructions explain that you absolutely must coat the basswood fins in thinned epoxy or it will shred. This is a difficult and time consuming process. I opted to take my chances and soak the fins in thin CA glue. I can't say for sure that it is just as strong but it should be. What I can say for sure is that its ready to sand within an hour, the sanding goes much quicker and it ends up being lighter. A word of caution: These are large fins and will take quite a bit of CA. I strongly advise doing this outside if you choose to go this route.

The kit comes with brass launch lugs. A lot of people like these and I have used them in the past, but I decided to use regular cardboard ones because it reduces the weight and they provide a strong bond. Brass needs to be roughed up to get a good bond and even with that, adhesives just don't stick to brass. This is not a problem with the kit, just a personal preference.

I added an extra 50 grams of nose weight so I could fly bigger motors. Mine came in at 490 grams completed.

Finishing:
After sanding the fins smooth, the kit was a breeze to finish. Since there was only a few inches of body tube, I opted to fill the spirals with spot putty. A few coats of primer sealed it up. I used Rustoleum Metallic Silver to paint the whole rocket. I then applied the decals and she was complete. The decals are nice quality and went on nicely but don't keep them in the water longer than necessary because the colors will run.

Construction Rating: 4 ½ out of 5

Flight:
The whole recovery system concept on this rocket is as innovative as I have ever seen. I found the recovery assembly difficult to pack. The steel leader kept getting in the way of the motor tube during assembly, but this is something I'm sure I'll get used to doing. The first flight was on an F25 to about 1,900 feet and straight as an arrow.

Recovery:
The recovery went flawless, but it landed a bit hard and one of the fins stuck in the ground. The CA must have done its job because there was no damage at all. I received several complements on the kit and the flight. Since I usually design odd things like this, everyone assumed I designed it. A few people had to know where I got it when I told them it was a kit. I did not use ant wadding in it, but there was no burn marks on the chute. You have the see the ejection design to appreciate it.

Flight Rating: 5 out of 5

Summary:
The quality of this kit and it parts is as good as it gets. Add to that the uniqueness of the design and the extras like the Nomex® chute protector, and you got yourself a top shelf product. (And imagine, this is only their first kit!)

CONs: I don't like paper transitions. I didn't feel that this would detract from my rating because it's only a personal preference. A balsa transition would have been better, but you can't have everything.

Overall Rating: 4 ½ out of 5

[Submit your Opinion]

GUEST's OPINION:
12/06 - "Flash update on the 3FNC! In response to feedback from our customers and testers the 3FNC has been re-engineered with Through The Wall (TTW) fin mounting for a more robust fin/BT joint. Thanks to James, Chan, Doc, Dennis and all the small creatures that inhabit my refrigerator. " (PEMTECH)

GUEST's OPINION:
01/06 - "Much thanks to Doc for his input and suggestions, his advice has brought about several improvements in the design. The 3FNC kit now comes standard with upgrades such as plywood fins instead of basswood (no more epoxy coating!), Kevlar® cord instead of the steel cable (now maybe Doc can pack the chute), a recovery system alteration (keeps the nose cone from spearing unsuspecting bystanders and adds cool retro domes) and a 22-inch chute. The paper reducer will remain, sorry Doc and no Marvin the Martian, the Disney cops have already threatened to break my kneecaps." (R.L.P)

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[Enter Flight Log]           Don't see your recently submitted flight log? Click Here
Date Name Motor Ejection/
Altitude
Wind Notes
10-29-2005 Drake Damerau AT SU F25-6 Apogee - Perfect 5-10 mph winds - Perfect textbook flight!
06-19-2005 Layne Pemberton AT RMS E18-4 Didn't Record 5-10 mph winds - First flight of the 3FNC. Round and round we go. 24mm casing experienced blow-by, thrust never came up to steam and the rocket did four loops at about 7 feet. Power Pranged but didn't suffer any damage.
10-21-2005 Layne Pemberton AT RMS F40-7 Didn't See 0-5 mph winds - Flashed off the pad in arrow straight flight and lost from sight. Perfect deployment and rocket missed power lines by mere feet. Basswood fin had broken off, time to go to plywood.
06-17-2006 Layne Pemberton AT RMS F39-6 Apogee - NC Down 5-10 mph winds - Working toward proving this kit on smaller motors. F39 gave a lovely slow liftoff , plenty of airspeed, very stable, textbook deployment and recovered within spitting distance of the launch pad. Another perfect flight, next stop an F22.
06-17-2006 Layne Pemberton AT RMS F22-7 None - Unknown 5-10 mph winds - Igniter wires remained attached to igniter, the tug angled the nozzle and she went Ground Piggy. She went horizontal for a bit then impacted at full speed. Snapped off the fins but no other damage.
06-19-2005 Layne Pemberton AT RMS F40-7 Didn't See 5-10 mph winds RIP - WHOOSH! My design is vindicated! She flashed off the pad trailing white smoke and disappeared. Parachute sighted and tracked all the way into the clutches of a Giant Tree Monster. Time to Build another. Status: Tree/Roof
06-24-2005 Chan Stevens AT EconoJet F20-7 Very Late 5-10 mph winds - Weathercocked sharply, should have used a -4 delay. Clean deploy but landed on road, now 1FNC until repaired.
 

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