white_25x10.gif (830 bytes) white_25x10.gif (830 bytes)
white_25x10.gif (830 bytes)
head_title.gif (3326 bytes)

Engine Mount Kits: EMK7-18-70 - $7.95

FlisKits is proud to introduce a full line of cluster motor mount kits for the model rocket cluster fanatics (just like us!).

The EMK7-18-70 Engine Mount Kit allows you to design or convert most any BT70 based model rocket for cluster flights using seven 18mm!   All FlisKits engine mount kits come with highly detailed instructions to allow for easy construction, super strong mounts and long life.

EMK7-18-70
The EMK7-18-70 engine mount uses SEVEN BT-20-0275 engine tubes, with engine blocks for each tube, centered in a round  pattern with rings designed to fit standard BT-70 body tubes with a 0.021" wall thickness.  This unique engine mount design comes to us from Robert Alway who first noticed that a cluster of 7 BT-20 tubes almost exaclty matches the outside diameter of a BT-70.  This means that you could not slide this cluster into the tube as it would not fit.  HOWEVER, if you replaced the outer 6 engine blocks with stage couplers, the outside diameter of the group of couplers is a near perfect match for the INSIDE diameter of the BT-70.   Problem solved!  Further, with the motor tubes exposed you get a very unique look to your cluster bird and also have a simple and accurately marked place for your fins (between the motor tubes!)   This mount does NOT include engine hooks but engine hooks can be added to the mount if desired.

FlisKits would like to thank Robert Alway for permission to recreate
his unique design in this accessory kit.

IMPORTANT: Anytime you are designing a cluster model or converting a model from single motor to cluster motor use you need to verify the stability of your model before flight.  Adding more motors to the model increases the weight in the rear of the model moving the Center of Gravity (CG) further back and may cause instability in your model.  If you are converting a known stable model, the easiest method to assure stability is to fully load the unmodified model for flight (motor installed, recovery device, etc) and balance this model on your finger.  This balance point is the CG of your model and you should mark this.  Then install the cluster engine mount and prep your model for flight again.  You will note that the CG has moved towards the back of the model.  Add nose weight to the nose cone until you have moved the CG back to its original point.  If you are designing your own model you should make yourself aware of model rocket stability and the relationships between the Center of Gravity and the Center of Pressure and how to measure both.


The EMK7-18-70 motor mount kit comes complete with:
QTY Description
7 BT-20-0275
1 EB-20-0025
6 CPL-20-0125
6 VPF-1870 vent plugs
1 Detailed instruction set

7-1870_front.jpg (58296 bytes)

This image shows the front and rear of the EMK7-18-70

7-1870_detail1.jpg (47043 bytes)Here is the assembled unit

7-1870_detail2.jpg (33046 bytes)

This is what it looks like installed into
a BT-70 body tube.

 

 

 

rockets! ROCKETS! lookit all the rockets!
"FlisKits make the best kits!"
TM

| Home | Products | Services | Ordering | About |
| Safety Code | Site Help | Archive | Photo Album | Feedback |
| EDUCATORS | NAR | Tripoli | ROL|
| TRF | EMRR |
| Warranty | Liability | Site Use |



FlisKits, Inc., Model Rocket Kits & Supplies
6 Jennifer Drive, Merrimack, NH 03054  -  (603) 494-1145
Copyright, 2006, All rights reserved - Web site developed by Toad's Tavern Graphics