LOC motor retention

LOC motor retention

Post by Jerry O'Sulliva » Mon, 12 Jul 1999 04:00:00



You can install t-nuts in the lower centering ring and use screws and
washers. I usually use 1/4" t-nuts.

Cheap and reliable. You still have to friction fit SU motors though.

Jerry

Quote:

>My first HPR purchase (a LOC-IV) has introduced something I hadn't
>expected - no engine hook in a HPR kit.  Wrapping the motor and
>friction-fitting is fine for smaller rockets, but seems inappropriate
>for something like this.

>I hope to certify with this, and don't want to embarrass myself.  Help
>via information or links would be appreciated.

>Jamie

 
 
 

LOC motor retention

Post by Bob Chmar » Mon, 12 Jul 1999 04:00:00


I'd recommend the use of Kaplow Klips.  Great for reloadable motors.  They
can also be used with SU motors although you still need to make a masking
tape thrust ring.

Find a post by Bob Kaplow and you'll find a URL to a web page with details.

--
Bob Chmara
NAR, HUVARS, TRA, Team1, L2, http://www.chmara.com/bt/rocketry
(remove SPAMFREE for personal replies)
The test of sincerity is the weight of the platitude. -anonymous

|My first HPR purchase (a LOC-IV) has introduced something I hadn't
|expected - no engine hook in a HPR kit.  Wrapping the motor and
|friction-fitting is fine for smaller rockets, but seems inappropriate
|for something like this.
|
|I hope to certify with this, and don't want to embarrass myself.  Help
|via information or links would be appreciated.
|
|Jamie
|

 
 
 

LOC motor retention

Post by Peter Cl » Mon, 12 Jul 1999 04:00:00


Quote:
>My first HPR purchase (a LOC-IV) has introduced something I hadn't expected -

no engine hook in a HPR kit.  Wrapping the motor and friction-fitting is fine
for smaller rockets, but seems inappropriate for something like this.

My L1 cert rocket used a hook, but I didn't trust it, so I friction fitted it
as well.  When I recovered it, the 29/180 motor was out from under the hook,
had moved 3/8", and was held in place with the friction wrap.  Since then I
friction fit the motor **and** then tape it to the aft end of the tube with
more masking tape. Haven't had any movement with that, and others have said
that works with 38mm, too.
Peter W. Clay NAR 18619 SR L1
"Experience is a good teacher, but her fees are high."

 
 
 

LOC motor retention

Post by Tad Danle » Mon, 12 Jul 1999 04:00:00


Quote:

> My first HPR purchase (a LOC-IV) has introduced something I hadn't
> expected - no engine hook in a HPR kit.  Wrapping the motor and
> friction-fitting is fine for smaller rockets, but seems inappropriate
> for something like this.

> I hope to certify with this, and don't want to embarrass myself.  Help
> via information or links would be appreciated.

> Jamie

Check out INFOcentral at RocketryOnline.  Then look under "Construction"
and "Motor Retention".  http://www.rocketryonline.com

Good luck!

--

Tad Danley, K3TD

Please note anti-spam device in use!

 
 
 

LOC motor retention

Post by Bob Kapl » Mon, 12 Jul 1999 04:00:00



Quote:
> I'd recommend the use of Kaplow Klips.  Great for reloadable motors.  They
> can also be used with SU motors although you still need to make a masking
> tape thrust ring.

> Find a post by Bob Kaplow and you'll find a URL to a web page with details.

Re the other followup that suggested 1/4" hardware. WAY overkill for 29mm.
I've used 6-32, and tha does fine for me. Besides, if you use 1/4", then you
need brass strip considerably wider than the 1/4" stuff I usually use.

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

vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
Kaplow Klips:   http://members.aol.com/myhprcato/KaplowKlips.html
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

NIRA:           http://www.nira.chicago.il.us  NAR:    http://www.nar.org

 
 
 

LOC motor retention

Post by Woody Mille » Mon, 12 Jul 1999 04:00:00


For the larger body LOC stuff, the t-bolts work great (Little Nuke,etc),
but the smaller ones (the Legacy for example), I attach threaded studs
to the moter mount, so that they stick out 1/2" or so..  For the Legacy,
I used #6 screws, about 2 1/2" long, with the heads cut off..    Built
the motor mount as normal, then used a dremel to cut a slot for the
screws... (2 - 180 dg apart)
Using a loc 29-24 adapter, I put a 1/4 or so piece of 29mm tube on one
end, and buy using wingnuts on the studs, can secure 29 or 24mm RMS
motors...
Quote:


> > My first HPR purchase (a LOC-IV) has introduced something I hadn't
> > expected - no engine hook in a HPR kit.  Wrapping the motor and
> > friction-fitting is fine for smaller rockets, but seems inappropriate
> > for something like this.

> > I hope to certify with this, and don't want to embarrass myself.  Help
> > via information or links would be appreciated.

> > Jamie

> Check out INFOcentral at RocketryOnline.  Then look under "Construction"
> and "Motor Retention".  http://www.rocketryonline.com

> Good luck!

> --

> Tad Danley, K3TD

> Please note anti-spam device in use!

 
 
 

LOC motor retention

Post by compute » Tue, 13 Jul 1999 04:00:00


Quote:

> My first HPR purchase (a LOC-IV) has introduced something I hadn't
> expected - no engine hook in a HPR kit.  Wrapping the motor and
> friction-fitting is fine for smaller rockets, but seems inappropriate
> for something like this.

> I hope to certify with this, and don't want to embarrass myself.  Help
> via information or links would be appreciated.

> Jamie

Jamie, I suggest you do this:

http://www.everett.net/users/bloomer/767fat.htm

With friction fit as well.

Steve Bloom

 
 
 

LOC motor retention

Post by Chuck Andru » Wed, 14 Jul 1999 04:00:00


Quote:
>----------


>Sent:       Sunday, July 11, 1999 3:16 PM

>Subject:    Re: LOC motor retention

>My L1 cert rocket used a hook, but I didn't trust it, so I friction fitted it
>as well.  When I recovered it, the 29/180 motor was out from under the hook,
>had moved 3/8", and was held in place with the friction wrap.  Since then I
>friction fit the motor **and** then tape it to the aft end of the tube with
>more masking tape. Haven't had any movement with that, and others have said
>that works with 38mm, too.
>Peter W. Clay NAR 18619 SR L1
>"Experience is a good teacher, but her fees are high."

This method WILL fail.... it's a just a matter of WHEN.

Don't rely on tape!

Chuck

- Show quoted text -

Quote:

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LOC motor retention

Post by Martin L. Schrade » Thu, 15 Jul 1999 04:00:00


I only have one HPR launch to my credit, but it was good enough to get me my TRA
Level Two. I flew a PML Explorer (now out of print) on a 38 mm H123, retained by
tape, more tape, and plenty of tape. Plus, I added some tape to be safe.
 
 
 

LOC motor retention

Post by Bill Kirb » Thu, 15 Jul 1999 04:00:00


Hmmm.... one flight to certify 2 levels, and an H motor at that.  Pretty
slick, man.



Quote:
> I only have one HPR launch to my credit, but it was good enough to get me
my TRA
> Level Two. I flew a PML Explorer (now out of print) on a 38 mm H123,
retained by
> tape, more tape, and plenty of tape. Plus, I added some tape to be safe.

 
 
 

LOC motor retention

Post by Martin L. Schrade » Sun, 18 Jul 1999 04:00:00


Oops! Sorry. It was a Level One cert.

(Class Two? Group Three?!? I think maybe I belong to too many organizations...)

 
 
 

LOC motor retention

Post by Michael Hedge » Mon, 20 Sep 1999 04:00:00


T-nuts its the only way
Quote:

> >----------


> >Sent:  Sunday, July 11, 1999 3:16 PM

> >Subject:       Re: LOC motor retention

> >My L1 cert rocket used a hook, but I didn't trust it, so I friction fitted it
> >as well.  When I recovered it, the 29/180 motor was out from under the hook,
> >had moved 3/8", and was held in place with the friction wrap.  Since then I
> >friction fit the motor **and** then tape it to the aft end of the tube with
> >more masking tape. Haven't had any movement with that, and others have said
> >that works with 38mm, too.
> >Peter W. Clay NAR 18619 SR L1
> >"Experience is a good teacher, but her fees are high."

> This method WILL fail.... it's a just a matter of WHEN.

> Don't rely on tape!

> Chuck

> > _____________________________________________________________
> > Deja.com: Share what you know. Learn what you don't.
> > http://www.deja.com/
> > * To modify or remove your subscription, go to
> > http://www.deja.com/edit_sub.xp?group=rec.models.rockets
> > * Read this thread at
> > http://www.deja.com/thread/%3C19990711161636.13966.00010412%40ng-fq1....
> >%3E

 
 
 

LOC motor retention

Post by Michael Hedge » Mon, 20 Sep 1999 04:00:00


Use Pam on  the threads  its great
Quote:

> >----------


> >Sent:  Sunday, July 11, 1999 3:16 PM

> >Subject:       Re: LOC motor retention

> >My L1 cert rocket used a hook, but I didn't trust it, so I friction fitted it
> >as well.  When I recovered it, the 29/180 motor was out from under the hook,
> >had moved 3/8", and was held in place with the friction wrap.  Since then I
> >friction fit the motor **and** then tape it to the aft end of the tube with
> >more masking tape. Haven't had any movement with that, and others have said
> >that works with 38mm, too.
> >Peter W. Clay NAR 18619 SR L1
> >"Experience is a good teacher, but her fees are high."

> This method WILL fail.... it's a just a matter of WHEN.

> Don't rely on tape!

> Chuck

> > _____________________________________________________________
> > Deja.com: Share what you know. Learn what you don't.
> > http://www.deja.com/
> > * To modify or remove your subscription, go to
> > http://www.deja.com/edit_sub.xp?group=rec.models.rockets
> > * Read this thread at
> > http://www.deja.com/thread/%3C19990711161636.13966.00010412%40ng-fq1....
> >%3E