Loc-Precision "Aura" Question

Loc-Precision "Aura" Question

Post by Rose Michael » Thu, 04 May 2000 04:00:00



Just got through finishing this kit, My question is about the MM 1
adapter, Can someone explain how it works, Will this enable me to use
BOTH 24mm & 29mm engines?!?  Has anyone had problems with friction
fitting motors with this kit? I loved putting this kit together and will
probably buy a couple more in the future, I've read all the reviews on
Essence's page and seems like this
friction fitting wasn't a big issue. Any thoughts?

      Thanks, James.............................

 
 
 

Loc-Precision "Aura" Question

Post by al » Thu, 04 May 2000 04:00:00





Quote:
>Just got through finishing this kit, My question is about the
MM 1
>adapter, Can someone explain how it works, Will this enable me
to use
>BOTH 24mm & 29mm engines?!?  Has anyone had problems with
friction
>fitting motors with this kit? I loved putting this kit together
and will
>probably buy a couple more in the future, I've read all the
reviews on
>Essence's page and seems like this
>friction fitting wasn't a big issue. Any thoughts?

>      Thanks, James.............................

I haven't built(nor familiar with it) this kit or used the
adapters..so i probably shouldn't even open my mouth.  But,
Kaplow Klips for positive motor retention have been mentioned
here many time than i want to even talk about.  Since the bird
is already built retrofitting for positive motor retention might
be a problem.  If you do have to rely on friction fitting, all i
can say is make sure you have plenty of friction(i don't know if
your using rms or single use motors, as i stated i'm not
familiar with the rocket)make sure that it takes some serious
effort to get the motor and/or adapter tube to where it needs to
be so it will reduce the chances of having the motor kick out
during ejection...sorry i couldn't be of more help...i'm sure
someone will post something worth reading...i just saw that you
had no responses and figured i'd give my 2 cents if no one else
does.

good luck,

alan

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Loc-Precision "Aura" Question

Post by BRMut » Fri, 05 May 2000 04:00:00


Hi,
  Kaplow klips on an Aura are a problem, due to the small diameter.  I was able
to fake it by using some lock nuts from a computer SCSI cable (the ones that
firmly attach the cable to the socket on the computer).  With a bit of filing,
I got them to fit between the motor mount tube and the airframe.  I forget
which size cap***fit, but one did...

Fly straight and true!

MikeyR

 
 
 

Loc-Precision "Aura" Question

Post by Barry Lync » Fri, 05 May 2000 04:00:00


The MM 1 adapter is simply a cardboard tube with an outer diameter of 29mm
and an inner diameter of 24mm.
Friction fitting motors is a process whereby you wrap masking tape around
the 24mm motor typically in a spiral configuration.  The trick here is to
make the motor slide tightly enough into the MM 1 that it will not be
expelled during the ejection charge stage but not so tightly that you cant
get it back out later.  If the 24mm motor you are using does not have a
thrust ring you also need to build one up on the nozzle end using several
wraps of masking tape.
The next step is to friction fit the MM 1 into the rocket.  This is
essentially the same method also utilizing the thrust ring wraps.  Remember,
as the motor burns it heats the tape which also increased the amount of
friction between the motor and the adapter.

An alternate method is to simply slide the 24mm motor into the MM 1 as far
as your thrust ring will allow and tape that ring to the end of the adapter
with several wraps of tape.  If I am using one of the longer 24mm motors
that extends beyond the length of the MM 1 (such as a G55 which will make
that Aura beg for mercy), I just run a few wraps of tape at the other end of
the motor as a kick ring.  The addition of motor retention clips is quite
popular and easy to do.  Personally, I have rockets with and without and
have only had one motor kick out.  The one time it did kick out was on a
cluster of D12's.  When they all expel their ejection charge at once the
weak one sometimes goes - even with many wraps of tape.

Good luck - you will enjoy flying this one on D,E,F and G motors - (some H's
can pull the fins off by putting more pressure on the cardboard laminations
than they can handle - my Onyx lost a fin on an H180 the other day).  If you
go bigger, I would add some fiberglass or use a single use motor.  I think
this was the original "mach buster".

--
Barry E ***
NAR#76085 SR L2 TRA# 7961 L2
http://www.FoundCollection.com/~be***/


Quote:
> Just got through finishing this kit, My question is about the MM 1
> adapter, Can someone explain how it works, Will this enable me to use
> BOTH 24mm & 29mm engines?!?  Has anyone had problems with friction
> fitting motors with this kit? I loved putting this kit together and will
> probably buy a couple more in the future, I've read all the reviews on
> Essence's page and seems like this
> friction fitting wasn't a big issue. Any thoughts?

>       Thanks, James.............................

 
 
 

Loc-Precision "Aura" Question

Post by Alex Merica » Fri, 05 May 2000 04:00:00


I added a thrust block at the top of the motor tube.  It is set to handle
single use F or G motors.  For short motors I use spacer tubes.  I friction
fit the motors with a wrap or two of tape.

I've flown this way on D's and F's.  I like the rocket too much to fly it on
a G!  Flies nicely on D's, really moves on F's.

Quote:

> Good luck - you will enjoy flying this one on D,E,F and G motors

--
Alex Mericas
NAR 62956 Level 2
President, Austin Area Rocketry Group
 
 
 

Loc-Precision "Aura" Question

Post by Rick Jame » Fri, 05 May 2000 04:00:00




Quote:
> Just got through finishing this kit, Has anyone had problems with
friction
> fitting motors with this kit? I loved putting this kit together and
will
> probably buy a couple more in the future, I've read all the reviews on
> Essence's page and seems like this
> friction fitting wasn't a big issue. Any thoughts?

>       Thanks, James.............................

I don't like friction fitting because I don't like the mess caused by
all that tape.  But that's just my opinion.  I understand it works
quite well for some people.
I built the LOC Aura using an AeroTech engine clip.  I wouldn't
rcommend it.  I regret doing it.  Not only that, it doesn't work.  It
kicked out my casing at Black Rock last year.
I just finished building an Estes Black Brant that I wanted to be able
to use any length 24mm motor (I have my eye on the Rocket Vision
motors).  I wanted a positive retention.
I drilled two small holes in the side of the body body tube about an
inch or so back from the aft end - being careful to not go through the
motor tube - and epoxied in two t-nuts.  Then a brass strip with a hook
at one end and two matching holes can be screwed into the side with the
hook holding the motor in place.
I haven't flown it yet but I am confident that it will work.  I'm
tempted to buy another LOC Aura just so I can do it right this time.
It would be better to do this before finishing the rocket, but I think
you could retro it in easily enough.
Hope this helps
--
Rick James
NAR#73338

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Loc-Precision "Aura" Question

Post by Bob Kapl » Fri, 05 May 2000 04:00:00



Quote:
> I haven't built(nor familiar with it) this kit or used the
> adapters..so i probably shouldn't even open my mouth.  But,
> Kaplow Klips for positive motor retention have been mentioned
> here many time than i want to even talk about.  Since the bird

IIRC (I cloned an Aura, but never had the real thing), it's a tight space,
and instead of a plywood ring it's got the big fat cardboard rings, like
scaled up estes AR2050 rings. The cardboard might be solid enough that you
could just drive say a 4x40 sheet metal***into it to hold Kaplow Klips
or other retainer. There just isn't much room for anything else.

Likewise with the MMA-1, which is just a 29mm OD tube with 24mm ID. I've not
come up with anything to fit that adapter. I did permanently attach a ring
of 29mm MMT to the end of the adapter, giving it the same kind of shoulder
as a reload casing.

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

Kaplow Klips:   http://www.FoundCollection.com/(baffle too!)
NIRA:           http://www.FoundCollection.com/  NAR:    http://www.FoundCollection.com/

 
 
 

Loc-Precision "Aura" Question

Post by Stefan Wimm » Fri, 05 May 2000 04:00:00


Sorry, I didn't find the time to build a full webb-page around it, but here
are two picturtes that show how I did PR on a V2 which is still under
construction. I plan to use a loop of some small diameter iron wire (like
the one used to bundle flowers) to secure the motor (RMS or SU with tape
thrust ring) in the rocket.

http://www.GeoCities.com/CapeCanaveral/6368/v2posr1s.jpg
http://www.GeoCities.com/CapeCanaveral/6368/v2posr2s.jpg

of course y'all know my other PR-Page at:
http://www.GeoCities.com/CapeCanaveral/6368/posret.html

HTH,
Stefan

--
Stefan Wimmer                        ADVA AG Optical Networking

WWW     http://www.cellware.de/      12489 Berlin, Germany

Visit my private Homepage:  Love, Electronics, Rockets, Fireworks!
http://www.geocities.com/CapeCanaveral/6368/

 
 
 

Loc-Precision "Aura" Question

Post by Jay War » Fri, 05 May 2000 04:00:00


Quote:

> Just got through finishing this kit, My question is about the MM 1
> adapter, Can someone explain how it works, Will this enable me to use
> BOTH 24mm & 29mm engines?!?  Has anyone had problems with friction
> fitting motors with this kit? I loved putting this kit together and will
> probably buy a couple more in the future, I've read all the reviews on
> Essence's page and seems like this
> friction fitting wasn't a big issue. Any thoughts?

>       Thanks, James.............................

I used two tiny screw-in eye bolts. One on either side of the MMT.
Dipped em in epoxy and screwed them directly into the motor mount. Then
I use light gauge safety wire to tie in the motor. You ought to see her
fly on a G80!
--
Jay Ward, KE4ZOG, TRA # 5725, L2, IAR #68
Father, Husband, Brewer, Rocket Scientist <G>
check out the Brewery http://www.gate.net/~jaywward
rockets http://www.gate.net/~jaywward/coresample.htm
 
 
 

Loc-Precision "Aura" Question

Post by Rick Jame » Fri, 05 May 2000 04:00:00


James,
You didn't ask about this, but I'm going to tell you anyway.  The kit
comes with a streamer.  The first time I flew it was on a dry lake bed
and I used the streamer.  Upon landing, one of the fins broke off de-
laminating the body tube.  It was easy enough to fix, but I use a 15"
parachute now.
--
Rick James
NAR#73338

Sent via Deja.com http://www.deja.com/
Before you buy.

 
 
 

Loc-Precision "Aura" Question

Post by eric » Fri, 05 May 2000 04:00:00





Quote:
>Just got through finishing this kit, My question is about the
MM 1
>adapter, Can someone explain how it works

The kit is a little light on instructions on this. Here's what I
did:

1) I built myself a thrust ring at the back of the adapter, by
epoxying on a ring (built out of surplus estes body tube) about
1/4" wide. I also used a bit of masking tape on the adapter to
make it fit snugly inside the rocket mount.

2) Take a standard estes thrust ring for a 24 mm tube, and epoxy
it into the top of the MM1. I only pushed the thrust ring in for
half of its thickness, and then used liberal amounts of epoxy to
bond it into the adapter.

3) Get a standard estes tube coupler for a 24 mm tube. It's
about 1" long. If you put this into your adapter now, a D engine
will stick out just enough to remove it, and you can remove the
coupler if you want to use larger 24mm motors.

4) I use a bit of masking tape around the D to make sure it's
secure.

As others have mentioned, this rocket is a de-finning machine;
it comes down really fast. Mine definned on its first launch,
landing in a soft grassy field.

I reinforced it by drilling a line of 1/16" holes along the side
of each fin, and then another line of holes through the root of
the fin. A liberal amount of epoxy with cut fiberglass was
pushed into the holes. That seems to have fixed it; the last two
launches have ended up with the fin securely embedded in the
ground.

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Loc-Precision "Aura" Question

Post by nojun » Fri, 05 May 2000 04:00:00


Quote:

> As others have mentioned, this rocket is a de-finning machine;
> it comes down really fast. Mine definned on its first launch,
> landing in a soft grassy field.

> I reinforced it by drilling a line of 1/16" holes along the side
> of each fin, and then another line of holes through the root of
> the fin. A liberal amount of epoxy with cut fiberglass was
> pushed into the holes. That seems to have fixed it; the last two
> launches have ended up with the fin securely embedded in the
> ground.

After every one I saw fly popped off a fin, I made some mods to mine,
and made it through-the-wall/to-the-motor-mount.  Abby used epoxy rivets
as you described and *still* popped a fin on landing.  My fins are only
a little bit shorter.  I also filled in the rear end of the body tube
behind the rear centering ring with epoxy/microballoons blend.  I
drilled a small hole in the epoxy that I use to***in a motor
retaining wire ("J-clip").  Works fine, and when the hole gets a little
sloppy from use I can drill another without any hassle.

--
Mike
NAR #70953 - Sr/Insured/Level-1 ~ SeaNAR - The Seattle NAR Section #568
NO Junk Email, please! Real email to: amphoto [at] blarg [dot] net.
<WARNING: Do not look into laser beam with remaining eye!>

 
 
 

Loc-Precision "Aura" Question

Post by Tom Binfor » Sat, 06 May 2000 04:00:00


Quote:

> After every one I saw fly popped off a fin, I made some mods to mine,
> and made it through-the-wall/to-the-motor-mount.  Abby used epoxy rivets
> as you described and *still* popped a fin on landing.  My fins are only
> a little bit shorter.  I also filled in the rear end of the body tube
> behind the rear centering ring with epoxy/microballoons blend.  I
> drilled a small hole in the epoxy that I use to***in a motor
> retaining wire ("J-clip").  Works fine, and when the hole gets a little
> sloppy from use I can drill another without any hassle.

I haven't seen one pop a fin. Is the glassine removed from the bonding
area?
We've successfully flown Auras on G500s and all flights were with the
supplied streamer.

Tom