ADDITION OF IN-FLIGHT REFUELING SYSTEM

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP89B00980R000300010018-2
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 5
• Document Creation Date: December 15, 2016
• Document Release Date: October 9, 2003
• Sequence Number: 18
• Publication Date: January 16, 1961
• Content Type: FORM

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ENGINEERING STUDY
WCKHEID AIRCRAFT CCiRP.
-101
CHANGE PROPOSAL UiJ
DATE
1-16=61
AFFECTS' WSPO PROJECT FX]
NAME OF MAJOR COMPONENT
PART OR LOWEST SUBASSEMBLY
PART NO. & MODEL OR TYPE
AIRPIANE
- - - -
TITLE OF PROPOSAL: 7
ADDITICE OF IN-FLIGHT REFUELfl G SYSTEM
NATURE OF PROPOSAL
SEE PAGE 2
REASON FOR PROPOSAL
To provide in-flight refueling capabilities on two U-2C aircraft per customer
request. The proposed IFR configuration is based on design studies authorized
by approved Change Proposal LAC-91.
ESTIMATED COST AND TIME _INVOLVED
c
IG S
ADDITIONAL FUNDING REQUIRED :
IC
ESTIMATED COST FOR KITS OR PARTS See Page 1~
ADDITIONAL FUNDING REQUIRED None (SP-1918 & SP-1917)
ITEMS AFFECTED BY PROPOSAL
SAFETY
MISSION
EFFEC-
PERFORM-
ANCE
OPERATING
PROCEDURE
INTER.
CHANGE.
WEIGHT OR
WEIGHT &
TOOLS &
SUPPORT
MAINTE.
NANCE
SERVICE
LIFE
FLiCHT
MAINTE-
TIVENESS
ABILITY
BALANCE
EQUIPMENT
PROCEDURE
MANUAL
NANCE
MANUAL
a
Q
a
a
a
a
a
EST. MAN/HRS. REQ'D. TO ACCOMPLISH CHANGE IN FIELD
SOURCE OF PARTS FOR K;_6
AVAILABILITY WEEKS AFTER APPROVAL
LAC
See Page 4 STA
DISPOSITION OF SPARES AFFECTED AP P r? rc or rec u rcvi.4,. o s a re s A 14
None ~.er list .ten baggy S.
INITIATED BY : APPROVED
A p p r o v e d PRO=
For Release 2004/05/13 IA-RDP89B009 OO$00010018-2
SP-E-1A
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Approm
e
 LAC-101
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1. Develop and install an in-flight refueling system on two U-2C aircraft.
The design to be based on use of the KC-135 tanker flying boom equipment,
and to provide for refueling the main wing tanks only, utilizing a hyd-
raulically extendable and retractable nozzle receptacle installed on the
top centerline of the fuselage above the sump tanks. Refueling the main
wing tanks requires modification of existing fuel system plumbing to feed
from these tanks first. To maintain satisfactory flight characteristics
for all fuel loadings with the revised "using" sequence, the zero fuel
weight C.G. limits will be changed to approximately 26.0-26.5% MAC (actual
limits to be determined by flight testThe aircraft will be ballasted
for the most forward loading condition to bring it within the above C.G.
limits. This loading condition is assumed to be as follows:
All other load configurations will require a weight and balance check prior
to flight, with the addition of temporary ballast if necessary.
This Change Proposal also includes (1) incorporation of an additional 514
cubic inch container in-the ship's oxygen system which will provide an 02
supply with adequate reserve for the longest refueling mission, and (2)
installation of an electric driven submerged fuel boost pump with cockpit
control switch. This will provide the pilot with optional back up for the
existing hydraulic driven pump in the event of loss of hydraulic pressure
or unsatisfactory fuel flow conditions.
To assure optimum utilization of the proposed IFR capabilities, consider-
ation should be given to the following:
a. Fuel Logistics: A problem may exist since the U-2C normally
operated on LF1A or JPTS fuel, whereas the KC-135 normally
operates on JP-1 (but is capable of using either fuel).
b. Rendezvous: Problems experienced in a trial rendezvous of a
U-2C and KC-135 Tanker under ideal daytime conditions and
using a 2-way radio communications indicate considerable
difficulty may be encountered on actual refueling missions
when attempting to rendezvous without use of homing facilities.
f!. Modification of the aircraft (U-2C) to consist of the following:
a. Fuselage: Provide hole in structure at top centerline between F.S.
365 and 389, beef up structure locally and add mounting provisions
for refueling Receptacle. Install vapor tight container to seal
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 LAC-lOl
Approved For.Release 2004/05/13 : CIA-RDP89B0098cR00030001 Q 23 of 5
NATURE OF PROPOSAL: (Cont.)
off vapors from engine section. To accomodate installation of a -
(refueling) fairing and maintain service accessibility, relocate
openings for the refrig. coolant discharge, refrig. regulator access,
cabin air discharge louvers, oil tank filler, P-2 exhaust vent, and
engine section cooling scoops. Install ducting as required by re-
location of outlets and scoops.
Relocate upper navigation light to top of new fairing aft of Recept-
acle. Construct and install fairing to house refueling Receptacle
and HF antenna tuner. Revise plumbing, wiring, and comptessor bleed
air duct in the upper engine section as required to avoid interferences.
b. Fuel System: Revise plumbing arrangement to feed the main wing tanks
into the left-hand (high level) sump tank, and the auxiliary tanks into
the right-band (low level) sump tank. Install refueling Receptacle Assy,
(GFAE), disconnect pressure seitch, flow regulator, check valves, and
connecting plumbing to right and left hand main wing tanks. Install
shut-off valves and associated float valves with related plumbing in
main wing tanks. Install electric driven fuel boost pump in R.H. sump
tank with related plumbing. Replace chip catcher with 200 mesh strainer
and install manual fuel shut-off between sump tanks and strainer.
c. Hydraulic System: Revise the hydraulic panel and install solenoid
control valves and related plumbing to connect with the refueling
Receptacle actuating cylinder and nozzle latch cylinder.
d. Cockpit & Electrical: Construct and install IFR control (switch)
panel in L.H. console. Modify instrument panel by installing IFR
system indicator panel in space presently occupied by the Magnetic
Compass. This requires addition of new mounting provisions and re-
location of the Magnetic Compass to the upper right periphery of
the panel. Construct and install new instrument panel glare shields.
Install refueling Receptacle Signal Amplifier in cockpit. Install
fuel level float switches in L. and R. main wing tanks for indicating
full and half-full conditions. Install wiring from cockpit to the
refueling system fuel and hydraulic valves, nozzle receptacle, and
tank mounted float switches. Install electric fuel boost pump con-
trol switch and related wiring.
e. Oxygen System: Install one additional 514 cubic inch oxygen bottle
in the L.H. cheek with related mounting bracketry, valves, and plumb-
ing.
3. No Service Bulletin required. All work to be performed at the factory on
the basis of engia4eering drawings.
11..
This ECP does not include changes required to the KC-135 or installation
of any electronic equipment for rendezvous.
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g; 4of5
GFAE EQUIPMENT LIST
AF Stock No.
Part No.
Description
Quantity
Per A/C
1560-652-0951
vM65350-14
Receptacle Assy.
1 Ea.
:L56o-341-6238
vM65395 - 21
Guide Assy
1 Ea.
1560-345-2541
VM65379-3
Shim (Cover)
12 Ea.
vM3817o-12
Cylinder Assy
1Ea.
1560-345-2542
VM65382-1
Spring May
1Ea.
1560-345-2538
vM65305-1
Strut Assy (Down Lock)
1 Ea.
1560-345-2537
vM653o4-1
-Strut-Assy (Up Lock)
1 Ea.
1560-345-2536
vM653o1-21
Torque Shaft May
1Fa.
5306-625-5426
vM653o9-1
Bolt (Stop)
2 Ea.
5560--345-2541
VM65379-2
Shim (Stop Bolt)
2 Ea.
1560-345-2544
VM65399-21
Bearing Support May
1Ea.
The GFAE test nozzles listed below are required to ground check the aircraft
refueling system. It is essential that a set of one each be supplied on a loan
basis to the Contractor as soon as possible after start of aircraft modification.
It is also recommended that a set of one each be considered for the using detach-
ments.
AF Stock No. Part No. Description
4920-547-9016 VME500015 Nozzle - Test, Refueling
4920-587-4923 VM19607 Nozzle - Test, Electrical
ESTIMATED COST OF TWO INFLIGir REFUELING KITS (SP-1918)
I)es ign
Mfg. Assem. & Installation
(Includes material & parts)
Flight Test
TOTAL PRICE SP-1918
SCHEDULE
1. Prototype - May 22, 1961
2. Subsequent Article - Depending upon availability of aircraft and workload.
The modification,.elated estimates and schedule outlined in this proposal
are based on the timely receipt of the GFAE Equipment listed in this ECP.
STAT
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 LAC-101
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RECCNIl4MED SPARES SP-1917:
The recommended spares are to be ordered by the depot on Purchase Order Requests.
(Note: The spares listed below have been ordered to take advantage of price
breaks).
Description Qty.
Valve - Hyd. Selector 4
Valve - Hyd. Selector 4
Switch - Pressure 8
Valve - Press. Fueling 8
(Make from 5-256-51)
Valve Shut off 4
Valve - Float 3
Limiter - Flow 3
Switch - Float 6
Relay 4
Amplifier 4
Switch 4
Switch 4
Light Assem. 4
Relay 6
Switch- Receptacle 8
Switch - Receptacle 8
Unit Price
Total Price
STAT
3.4120-4
3.8140-2
3.43oD-22A-52
F[-254
1.2257-29
2-153-101
6487
x'73470
MH18D- 26.5
A20-1B
A4o2P4SRB-4
4TL1-3D
R3315
9220-3620
tHS35
]3157
COST RECAP:
Total Price SP-1918
Total Price SP-1917
PRICE SP-1917
STAT
STAT
Approved For Release 2004/05/13 : CIA-RDP89B0098OR000300010018-2