# Slimline motor retainers

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#### Missileman

##### Well-Known Member
I have just installed a new Slimline Retainer on my latest creation and have noticed a change in style.
The new and improved retainer now has a shoulder inside.
No more worries about how far to insert the retainer onto your motor tube, just slide it up to the shoulder and your done.
As an added bonus, now my motor will be thrusting against the metal shoulder of the retainer and not directly against the motor tube itself.
I like it

#### DynaSoar

##### Well-Known Member
Originally posted by missileman
I have just installed a new Slimline Retainer on my latest creation and have noticed a change in style.
The new and improved retainer now has a shoulder inside.
No more worries about how far to insert the retainer onto your motor tube, just slide it up to the shoulder and your done.
As an added bonus, now my motor will be thrusting against the metal shoulder of the retainer and not directly against the motor tube itself.
I like it
Then I got the new version for my Mirage. Yes, it's nifty. I've got the 38mm and the adapter for it also, but haven't used them yet.

#### eugenefl

##### Well-Known Member
TRF Supporter
I dunno. The piece looks really clean and really nice. I have been to several vendor sites before, added it to my basket, then dropped the mouse and ran away. This is one of those "things" in life that I just can't get over. I see it for what it is - a small piece of metal that probably costs little in material yet is very necessary to have. It's kinda like having to go to an auto dealership to pay $15 for a$.25 bolt because it's a specialty item.

Ok, so this reply is kind of a gripe but isn't because I have 2 rockets in the build stages that *will* have a clean finish (motor retention inclusive) that will utilize the Slimline pieces. If only I had some metals workshop skills.

#### DynaSoar

##### Well-Known Member
Originally posted by eugenefl
I dunno. The piece looks really clean and really nice. I have been to several vendor sites before, added it to my basket, then dropped the mouse and ran away. This is one of those "things" in life that I just can't get over. I see it for what it is - a small piece of metal that probably costs little in material yet is very necessary to have. It's kinda like having to go to an auto dealership to pay $15 for a$.25 bolt because it's a specialty item.

Ok, so this reply is kind of a gripe but isn't because I have 2 rockets in the build stages that *will* have a clean finish (motor retention inclusive) that will utilize the Slimline pieces. If only I had some metals workshop skills.
It's more like buying a Lexus for taking you to the store, when you could make do with an Escort. It is a well engineered piece of work that's difficult to produce well. That costs.

I like mine a lot and I'm glad I got them. Remember, I've come up with two different $2 positive motor retainers that have both been proven to work up through G power so far. I don't *need* the Slimline. It just goes really well the the whole ambiance of my modded out Mirage. #### eugenefl ##### Well-Known Member TRF Supporter Originally posted by DynaSoar It's more like buying a Lexus for taking you to the store, when you could make do with an Escort. It is a well engineered piece of work that's difficult to produce well. That costs. I like mine a lot and I'm glad I got them. Remember, I've come up with two different$2 positive motor retainers that have both been proven to work up through G power so far. I don't *need* the Slimline. It just goes really well the the whole ambiance of my modded out Mirage.
Well, I broke down and got myself 2 Slimline retainers *gulp*. I have 2 rockets coming down the line that'll need a finer touch. My <a href="https://www.rocketryforum.com/showthread.php?s=&threadid=11143">Upscale MAXI-Icarus</a> will get one and the other will go on a 2.6" dia Black Brant II that I have all the parts for.

I guess another way of looking at it is that the retainer is more of an "insurance" than anything. I look in my motor box and all I find now are RMS motors so it only makes sense.

#### Missileman

##### Well-Known Member
Other types of retention on the cheap work very well for any size motor but in special circumstances slimline or equivalent is a must.
One such instance is boattail models (not else much, that looks half way decent ,will work)
And of course that extra touch for that special build.
The latest use of mine is on an Interceptor G.
It has about 3" from the aft CR to the end of the motor tube.
This is covered with a very thin molded piece.
Slimline was about the only choice for this one.

#### eugenefl

##### Well-Known Member
TRF Supporter
Originally posted by missileman
Other types of retention on the cheap work very well for any size motor but in special circumstances slimline or equivalent is a must.
One such instance is boattail models (not else much, that looks half way decent ,will work)
And of course that extra touch for that special build.
The latest use of mine is on an Interceptor G.
It has about 3" from the aft CR to the end of the motor tube.
This is covered with a very thin molded piece.
Slimline was about the only choice for this one.
Yep, I'm hoping to bore out the MMT opening in the Black Brant II boattail to accomodate the Slimline. I got the nosecone/tailcone from Red Arrow a while back. I think I'm getting tired of taping motors too! It's always a struggle to get the motors settled in for a flight and then some to get them out.

#### DynaSoar

##### Well-Known Member
Originally posted by eugenefl
Yep, I'm hoping to bore out the MMT opening in the Black Brant II boattail to accomodate the Slimline. I got the nosecone/tailcone from Red Arrow a while back. I think I'm getting tired of taping motors too! It's always a struggle to get the motors settled in for a flight and then some to get them out.
I wish I'd have bored out the PML tail cone on the Mirage so the Slimline would fit in it up to the outer collar (see pics under Kit Reviews). It would have made a cleaner build.