# Presentation: 546610

## MTP Installation on the WB-57 for CRYSTAL-FACE 

**MTP components are (from sky to aircraft):**
-  **Fairing:** Provides microwave transparent window instrument
-  **Sensor Unit (SU):** RF and Digital Hardware
-  **Data Unit (DU):** Control and Data Storage
-  **WB-57 Analysis Computer (WAC):** Retrieves temperature profile & sends video signal to backseat display
-  **Cables:** Connect SU to DU, DU to WAC and Aircraft Power/Control, WAC to Backseat Display

- MTP shown at 9 o’clock position on right spear pod; will be
- rotated 180 degrees on left spear pod for CRYSTAL-FACE.

- MJ Mahoney
- Jet Propulsion Laboratory, California Institute of Technology
-  Pasadena, CA
- Last Revised: March 26, 2002

## MTP Component Dimension, Volume, and Mass Summary

**Component ****	****	****Length ****	****Width****	****Height****	****Volume****	****      Mass**
- 			*(cm/in)**	**(cm/in)**	**(cm/in)     (cm**3**/in**3**)**	**     (kg/lb)*
**Sensor Unit** (with bracket)	24.0/10.0   12.5/5.0     16.0/6.5     5,083/325        5.2/11.5
**Data Unit**			20.0/8.0     35.5/14.0	10.0/4.0	7,100/448	      4.2/9.2
**Realtime Analysis Computer**	35.0/14.0	25.0/10.0 	  8.0/3.0	7,000/420	      4.5/10.0
**Cables**							      1.4/3.0
**Total**					                19,183/1193    15.3/33.7

**MTP Component Dimension, Volume, and Mass Summary**

**Other Useful Information:**
-  All MTP components use 6061 aluminum, and have received a chemical film treatment meeting MIL-C-5541E Class 3
-  All MTP components are mounted by using 10-32 Floating Nut Plates meeting NAS 1068A3
-  Mounting hardware are NAS 3 or NAS 1303 compatible, and are certified to >160 ksi
-  Since each component box is almost entirely filled and their mass ~10 lbs., the center of gravity of each component box may be considered to be the geometrical center of the box.

## MTP Fairing, Sensor Unit, and Sensor Unit Mounting Bracket on WB-57

**MTP Fairing, Sensor Unit, and Sensor Unit Mounting Bracket on WB-57**

## MTP Sensor Unit Attachment to Mounting Bracket

*(Above)* View of MTP in spear pod cone area with mounting bracket seen from behind. Black cable to Data Unit is visible going up from back of Sensor Unit.
*(Right)* View of  the Ellington-provided mounting bracket from the front. The MTP Sensor Unit (show above without cover plate) mounts to an adapter plate by four NAS 1068A3 Locking Floating Nut Plates (Small Pattern) using standard NAS 3 10-32 hex bolts. The adapter plate (not shown) in turn mounts to six fixed nut plates using NAS 3 10-32 hardware on the mounting bracket (shown).

**MTP Sensor Unit Attachment to Mounting Bracket**

- Mounting Bracket

## MTP Components in Spear Pod Adapter Ring and Backseat

*(Top)* MTP Data Unit (DU) mounted in spear pod adapter ring
*(Middle)* MTP WB-57 Analysis Computer (WAC) mounted from a plate in spear pod adapter ring.
*(Bottom)* Old MASP Electronics box.

- A NTSC video signal from the WAC is sent to the WB-57 back seat for display. This is used by the backseater to have the pilot fly at specific altitude offsets with respect to the tropopause in order to meet science objectives.

**MTP Components in Spear Pod Adapter Ring and Backseat**

## MTP Sensor Unit (SU) WB-57 Dimensions

- MTP Sensor Unit (SU) dimensions. SU mounts from bottom (see next image).

## MTP Sensor Unit Attachment to Mounting Bracket Adapter Plate

- 5.0

- 1.25

- 1.25

- 9.0

- 4.5

- 2.5

- Reference
- Target

**Bottom of Sensor Unit**

- MTP Sensor Unit weighs 11.5 lbs (with bracket) and mounts to adapter plate (below) as described earlier.

- 8.125

- 4.5

- 2.5

- 2.0

**Adapter Plate to Mounting Bracket (Top)**

- 2.0

- Top of adapter plate is 0.060 inch thick aluminum provided by Ellington. Sides are made of 1 inch by 2 inch angle bracket aluminum which is 0.070 inches thick, also provided by Ellington.

- 3.25

- 1.5

- 3.0

- 1.25

**MTP Sensor Unit Attachment to Mounting Bracket Adapter Plate**

- Side View of Adapter Plate, with holes for bolting to mounting bracket.

- All Units are inches;
- Not drawn to scale

## MTP Data Unit (DU) WB-57 Installation

**MTP Data Unit**
**        ****(Front)**

- 14.5

- 4.0

- 1.5

- 8.0

- 2

- 11.25

- 7.125

- 1

- MTP Data Unit weighs 9.2 lbs, is made of 0.085 inch thick 6061 aluminum, and is mounted with AN3 10-32 hardware. It hangs from a Ellington provided 0.100 inch thick aluminum plate which is mounted to the top of a 19-inch rack in a pod adapter ring.

- To A/C

- To SU

- 14.0

- Green circles are 4 DU attach points; 4 open circles are attach points for mounting plate to 19-inch rack.

- Front

- All Units are inches;
- Not drawn to scale

**MTP Data Unit (DU) WB-57 Installation**

##  WAC

- 19.75

-  WAC
- (Front)

- 14.0

- WAC Mounting Plate (0.100 inches thick)
-            (Mounts to 19” rack in adapter ring)

- WAC box weighs 10.0 lbs, is made of 0.115 inch thick 6061 Aluminum and is mounted with AN3 10-32 hardware. Mounting flange is 1 inch wide.

- 2.6875

- 6.5

- 3.0

- 12.0

- Forward

- 10.0

**MTP WB-57 Analysis Computer (WAC) Installation**

- All Units are inches;
- Not drawn to scale