LOC IV information

LOC IV information

Post by John B Hoga » Fri, 21 May 1999 04:00:00



I am looking for information about the building and flying of the
LOC IV.  I like the graduator so much and am looking forward to
certifying level 1.

Any ideas for Mods to the kit to tweak it?

What about engine recommendations and performance?

Thanks for all the help!  This news group is great!

John

 
 
 

LOC IV information

Post by Balthez » Fri, 21 May 1999 04:00:00


John Hogan wrote asking about a LOC IV:

Quote:
>Any ideas for Mods to the kit to tweak it?
>What about engine recommendations and performance?

I built mine stock except I epoxied stitching canvas to the inner fin tabs for
reinforcement. Have flown it 3 times on a H97, G75 and a G80. All were good
flights. There are a bunch of folks here who did L1 with a IV - including
myself.
--

Bruce Kirchner
TRA L1 #5888       NAR #69850
Michigan Team 1   HUVARS
Visit My Rocketry Home Page - http://members.aol.com/balthezar/index.html

 
 
 

LOC IV information

Post by Ted Cochr » Fri, 21 May 1999 04:00:00



Quote:
>I am looking for information about the building and flying of the
>LOC IV.  I like the graduator so much and am looking forward to
>certifying level 1.

>Any ideas for Mods to the kit to tweak it?

Like Bruce, I certified on this rocket.

I built it zipperless. Later I added an Olsen altimeter for a couple of
flights, in a removable, self contained box bolted in the front of the
forward BT. You also might want to reinforce the inside of the fin/BT
joint if you plan to use big motors, small chutes, or fly off hard
surfaces.

Quote:

>What about engine recommendations and performance?

My fairly heavy (3.3lb) version gets 1300 ft on an H128.  Also likes an
H180 and a G75.  G80 was a little underpowered (especially the second
time, when it chuffed a bit before getting off the ground).  Used short
delays in all cases.

--tc

My opinions only.

 
 
 

LOC IV information

Post by Bryan Da Ma » Fri, 21 May 1999 04:00:00


Hey John. I built mine stock with the exception of I used CA to attatch
extensions from the fin tabs so they will reach the motor mount tube. I
figerglassed all fins, extended root and all. Also, I inserted the rear
centering ring until it butted up against the rear edge of the fin tabs. I
once read here that somebody suggested adding a third centering ring, which
would go right on the top of the fin tabs to better overall strength. Seems
like a fine idea. My LOC IV weight is 2.7 lbs loaded with an H128 reload. I
certified L1 with it on the first of this month and she survived. I've flown
it six times now including the cert flight. G80s or G64s work well. An F
blue thunder motor is decent for a loud flight in a smaller field. Very cool
rocket, the LOC IV is. I might have to take a look at the Graduator, too.

Bryan Chuck
NAR 73541 L1


Quote:
> I am looking for information about the building and flying of the
> LOC IV.  I like the graduator so much and am looking forward to
> certifying level 1.

> Any ideas for Mods to the kit to tweak it?

> What about engine recommendations and performance?

> Thanks for all the help!  This news group is great!

> John

 
 
 

LOC IV information

Post by Torey Kort » Fri, 21 May 1999 04:00:00


Hi, John:
  I have a LOC IV that has been through hell and back; still flying!
Great bird.  Anyway, if you want to use yours for higher power than G,
you will definately want to get some 1/8" aircraft plywood and make a
set of fins for it that go all the way to the motor tube.  Invest in a
spare centering ring and mount it immediately forward of the fins.
Fillet the fins and forward CR INTERNALLY before installing the aft
centering ring.  Use some type of motor retention system to keep the
motor from spitting out at ejection, it's much easier and more reliable
than using masking tape.  If you want to step up to some really major
power, consider a 38mm motor mount and centering rings.  You will
definately need the fins to mount on the motor mount tube for this one,
and fiberglass them or use G-10 material.  You may want to ditch the LOC
shock cord mount and drill a hole in your top centering ring and install
a 3/4" screw-eye there.  For extra insurance and system flexibility, use
a quick-link to bolt it in place.
  I hope this is some help to you.
  Keep 'em flying, -Dave Stout-
Quote:

> I am looking for information about the building and flying of the
> LOC IV.  I like the graduator so much and am looking forward to
> certifying level 1.

> Any ideas for Mods to the kit to tweak it?

> What about engine recommendations and performance?

> Thanks for all the help!  This news group is great!

> John

 
 
 

LOC IV information

Post by Bob Kapl » Sat, 22 May 1999 04:00:00



Quote:
> I am looking for information about the building and flying of the
> LOC IV.  I like the graduator so much and am looking forward to
> certifying level 1.

> Any ideas for Mods to the kit to tweak it?

See the article in my .sig about adding a third centering ring, baffle, and
of course Kaplow Klips.

Quote:
> What about engine recommendations and performance?

Just about any 29mm motor F-H with a short delay will do fine, with the
exception of the F14J and maybe F22J which is just too low thrust.

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html
NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

LOC IV information

Post by Jim Yan » Sat, 22 May 1999 04:00:00



Quote:


>> I am looking for information about the building and flying of the
>> LOC IV.  I like the graduator so much and am looking forward to
>> certifying level 1.

>> Any ideas for Mods to the kit to tweak it?

>See the article in my .sig about adding a third centering ring, baffle, and
>of course Kaplow Klips.

>> What about engine recommendations and performance?

>Just about any 29mm motor F-H with a short delay will do fine, with the
>exception of the F14J and maybe F22J which is just too low thrust.

>        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

>Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html
>NIRA:           http://www.nira.chicago.il.us   NAR:    http://www.nar.org


A question;how does one determine how long a delay to use?(for any rocket)

JimYanik,NRA member

 
 
 

LOC IV information

Post by Bob Kapl » Sat, 22 May 1999 04:00:00


Quote:

>>Just about any 29mm motor F-H with a short delay will do fine, with the
>>exception of the F14J and maybe F22J which is just too low thrust.

> A question;how does one determine how long a delay to use?(for any rocket)

Other than SWAG, you run a flight simulation for the rocket, and pick the
delay that is closest to what the simulations predicts. remember that delays
aren't usually what the manufacturer claims; you need to check against the
certification data from NAR or TRA to find what REAL delay is closest.
[that's why John Cato and I spent so many years harassing TRA over not
telling the delay results on motor certs. Thanks to Sue, they are now
available]

You also have to factor in wind and tipoff. Both will produce non vertical
flights, leading to apogee coming sooner than expected, requiring a shorter
delay. So if it's a toss-up, go short.

In general, big, fat, underpowered rockets need short delays. A Fat Boy on
anything short of an Andy S. kitbash, a LOC-IV on anything short of a full
H, Happy Meals, etc. all fall into this category.

        Bob Kaplow      NAR # 18L       TRA # "Ctrl-Alt-Del"

Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html
NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

LOC IV information

Post by Steve Bloo » Sat, 22 May 1999 04:00:00


Hi John,   I did my cert flight with a LOC IV also.  With the help of some
local gurus, I did some fin and motor mount mods and added a chute shelf
baffle.  I also added the T-nuts ala Klipper and made some hooks out of bent
up cotter pins.  Here's some pictures of a very similar rocket, Eric's SST.
It is essentially built the same way.  It's built of LOC IV parts, just a
little shorter.     http://www.everett.net/users/bloomer/bigplan.htm

Good luck.

Steve Bloom
Seattle Area Rocketeer
Skunkworks West
http://www.everett.net/users/bloomer/index.htm
For despaming:  Remove the pluralizing letter from bloomers

Quote:

>I am looking for information about the building and flying of the
>LOC IV.  I like the graduator so much and am looking forward to
>certifying level 1.

>Any ideas for Mods to the kit to tweak it?

>What about engine recommendations and performance?

>Thanks for all the help!  This news group is great!

>John