LOC/Precision LOC-IV

LOC/Precision - LOC IV {Kit} (PK-48) [1985-]

Contributed by Alex Rothchild

Construction Rating: starstarstarstarstar_border
Flight Rating: starstarstarstarstar
Overall Rating: starstarstarstarstar_border
Published: 2010-11-13
Diameter: 4.00 inches
Length: 47.50 inches
Manufacturer: LOC/Precision
Style: Sport
- by Tom Bell 

Instructions:
T' instructions were complete and easy t' follow.  Although this is a large rocket, it be nay difficult t' build. Avast, me proud beauty! T' parts were well manufactured and fit together without problems. Begad! This kit be me first large rocket, and it is a good starter kit for large rocketry despite its imposin' size. 

This kit requires epoxy for assembly o' t' fins and engine mount. Well, blow me down! Some instruction on epoxyin' is included, me hearties, shiver me timbers, but it would be a good idea t' do further research on this (web sites, matey, books, talkin' t' experienced builders) before starting. 

Latex gloves are a must. Well, blow me down! Epoxy can cause an allergic reaction over time if you use it with your bare hands. I mixed t' epoxy in small batches and put t' parts together one step at a time. Arrr! There are pros and cons t' 5-minute and longer-settin' epoxies, arrr, so check this out before starting if you're new t' this. 

[Picture]Quality:
T' LOC-4 is a very sturdy rocket. Blimey! Arrr! I have flown it a number of times and it has survived a lot o' abuse. T' LOC tubin' is thick and sturdy and has never zippered on me yet. 

This rocket is rated for t' G-80 motor, but I have successfully used it t' certify Level 1 usin' a H-238 motor. Avast! T' rocket stood up t' t' additional thrust with no problems. 

T' only problem with this rocket be t' fins.  They are sturdy plywood, but t' fin tabs only extend t' thickness o' t' body tube. Well, blow me down! Avast! Ideally, me hearties, fin tabs should extend through t' body tube and down t' the motor mount tube, which makes t' fins less likely t' pop out. Avast, me proud beauty! I may eventually cut some new fins with longer tabs t' do this.  T' fins do glue back easily once they pop out, me hearties, and I recommend a tube o' Liquid Nails for your range box for this eventuality. 

If you're interested in usin' t' LOC-4 for high-power motors, ya bilge rat, you may want t' upgrade t' motor mount t' a 38 mm tube.  You can get 38mm rings for t' 4" 
LOC body tube and a 38mm motor mount tube from LOC or your favorite store. 

T' package illustration shows a decal, me hearties, but me rocket didn't come with any. 
This is no big deal, matey, as you can buy all kinds o' decals at hobby stores. Ya scallywag! I used a checker-pattern model airplane mylar wrap on me LOC-4. This is a large rocket, me bucko, so be creative with it.  RC model airplane decals fit nicely on this big airframe. 

Flying:
This rocket is an excellent flyer and a great crowd-pleaser, due t' its large size. 
You can fly it without a FAA waiver, although make sure you have a FAA notice 
for t' launch, since it is over 1 pound. 

Performance is good with t' Aerotech F50-4 (the minimum I'd recommend) and t' G80-4 single-use and F-52 and G-64 reloads.  Short delays are recommended, ya bilge rat, due t' t' large size o' this rocket.  It won't go very high with these motors, me bucko, but it will have a slow liftoff and good flight. 

I certified with t' H238 and have also flown it with the G75, which be t' smallest Black Jack I'd recommend with this rocket(G-33's will get it off t' ground, ya bilge rat, but it may become a giant lawn dart) I also plan to launch this with a H128 in t' near future. 

Recovery is good with t' large nylon chute provided, me bucko, shiver me timbers, shiver me timbers, but you may pop a fin or two as it tends t' land hard due t' its large size. Be very careful if you're into midair catches...this rocket is a handful! My LOC-4 got a bad "road rash" on one landin' when it was dragged by its chute down t' road, ya bilge rat, me bucko, but it still flies great. 

My Rating:
I give t' LOC-4 4 points rating. Ahoy! Well, blow me down! It is a very good rocket, and would be perfect if the fin tabs were longer. I recommend this t' anyone who wants t' build their first LARGE rocket.

Other Reviews
  • LOC Precision LOC IV By Cody Smith (October 20, 2014)

    This kit was my Junior. Level 1 and I must say it is a beautiful kit. Some people say this rocket is not good for certifications due to the fact that the fins hang below the body. But, unless you land on concrete or desert, these fins are hard to break off. This kit is four-feet tall, four-inches in diameter and, coincidentally, my finished weight was four pounds. I tend to build heavy and ...

  • LOC/Precision LOC-IV By Alex Jordan

    Brief: This is a large single staged, simple mid/high power rocket. It uses parachute recovery and was my first big rocket. Mine came with a 38mm motor mount, although many websites say it has a 29mm motor mount. Also, the fin tabs extend all the way to the motor tube. Construction: The components of this kit came in the typical LOC plastic bag. All of the parts were of the highest ...

  • LOC/Precision LOC IV By Frank Ross

    ( Contributed - by Frank Ross - 11/11/00) Brief: Up-scaled to 38mm. Modifications: For my level-1 certification and my first high-power rocket I wanted a large, simple rocket kit without any bells and whistles. I chose the LOC-IV as I thought it looked to fit the bill, and wouldn't break my credit card. I decided to up-scale to 38mm rather than stick to 29mm because I liked the ...

  • LOC/Precision LOC-IV By Chris Kiekens

    Brief: An easy to build 3FNC rocket, built for my first shot with a reloadable motor. Construction: The kit contains a 4" kraft paper body tube, two centering rings (plywood) included, nose cone, 36" chute, elastic shock cord, 3 plywood fins, 29mm motor mount, and a 1/4" Launch Lug. This was a really easy kit to build. I spoke to LOC briefly regarding the fins, ...

Flights

Comments:

avatar
J.S. (November 1, 1999)
This is was my first High Power Rocket and my certification project (Level 1). Loc makes great kits and the transition to HPR is easy. The review is thorough and quite accurate in many respects, as the model will benefit from reinforcing the fin joints w/either with epoxy/FG on the fillet or better yet, extending larger fins thru the BT to the Motor mount. The fins extend below the bottom of the BT and "butt strikes" (even under canopy) tend to crack the fin joint loose. (My LOC IV needed fin reinforcing after each flight). I would like to know if anyone experienced this problem: On my first flight I used an Aerotech G55, which really put it up there, but the ejection heat must have damaged the stock white cardboard motor tube.... I couldn't get the Vulcan H100ss to fit for my next flight (certifiction) as the tube had collapsed somewhere ahead of the G55. So much for certifying that day. I extracted the whole works inside and replaced the stock kit motor tube with much sturdier stronger phenolic tube... no problem now!
avatar
M.K. (April 1, 2000)
Although I enjoy flying this rocket, I am disappointed by the fin design (true of all Loc/Prec models I have built). What would a few more centimeters of wood cost on the fin tabs? My Loc IV has been repaired every time I fly it, it is truly an epoxy sculpture. I guess I could 'glass the fins, but I really don't want to redo my paint job. My advice- if your looking for a 4" model to get into high power, check out Public Missiles instead. Their stuff is virtually indestructible.
avatar
S.F. (January 1, 2001)
The LOC IV was my first attempt into mid power rockets. I assembled the kit as per instructions and it was very easy to build. My rocket landed in a tree on its second flight, and broke a fin at the joint, despite glue fillets. I brought the rocket back home and used 2 oz. fiberglass and finish cure 20 min epoxy to reinforce the fins. This has made the fins extremely durable and the rocket is an outstanding flier on a RMS G64-4. To reinforce the fins, I first epoxied them into place and let them dry. Them I cut a piece of glass cloth slightly bigger than the area to be covered. I went down one fin, over the body tube and up the other fin. Then I repeated this until all fins were glassed.  after the cloth was cut, I mixed enough epoxy to cover all surfaces I was immediately working with. Then I carefully laid the cloth on the fins and rocket and smoothed it out with a squeegee until the cloth followed all contours and flat on the fins. After this has been done to all sided, sand it smooth and apply a second coat of Finish Cure 20 min epoxy. When that is dry add the glue fillets along the fin joints let that dry and sand and paint. This is an excellent rocket for those wanting something bigger then an Estes. It is straight forward and easy to build. It is straight forward and easy to build. If you reinforce the fins the rocket will fly straight and true for a long time. The review was right on the mark. I also found the rocket to be everything the reviewer said.
avatar
R.A.V. (November 4, 2001)
The review was right on the mark. The LOC IV was an easy build and finished up real nice. As the other comments stated the fins could use some work and a heat shield would be nice for the chute. Flew great on low Aerotech G motors and that big red chute made it easy to spot as it slowly floated back down. I launched with zero wind so it didn't drift very far at all but if there was wind it would drift quite a distance I'm sure. Even with that big red chute and slow recovery speed it still popped a fin on landing. Gave it some good epoxy fillets and it should be fine.

comment Post a Comment