Air Tanker 32 and 40, an F7F-3

F7F-3 N7195C, air Tanker 32
F7F-3, N7195C, air Tanker 32 at Santa Rosa, Calif. May, 1973.

We are adding four more photos today from the Flight Test Museum at Edwards Air Force Base — F7F-3 (N7195C). It was operated by Sis-Q Flying Service as Tanker 32  in May, 1973, and as Tanker 40 in August, 1975.

F7F-3 N7195C, air Tanker 40
F7F-3, N7195C, air Tanker 40 at Lancaster, Calif. August, 1975.
F7F-3 N7195C, air Tanker 40
F7F-3, N7195C, air Tanker 40 at Lancaster, Calif. August, 1975.
F7F-3 N7195C, air Tanker 40
F7F-3, N7195C, air Tanker 40 at Lancaster, Calif. August, 1975.

From Wikipedia:

The Grumman F7F Tigercat is a heavy fighter aircraft that served with the United States Navy (USN) and United States Marine Corps (USMC) from late in World War II until 1954. It was the first twin-engine fighter to be deployed by the USN. While the Tigercat was delivered too late to see combat in World War II, it saw action as a night fighter and attack aircraft during the Korean War. Armament was heavy: four 20 mm cannon and four 50 caliber (0.50 in; 12.7 mm) machine guns, as well as underwing and under-fuselage hardpoints for bombs and torpedoes.

The F7F-3 Tigercat variant:

Single-seat fighter-bomber aircraft, powered by two Pratt & Whitney R-2800-34W radial piston engines and featuring an enlarged tail fin for improved stability at high altitudes, 189 built.

Grumman F7F-3N Tigercat
Grumman F7F-3N Tigercat, 2007. Photo by Dziban303.

Surviving aircraft:

Beginning in 1949, F7Fs were flown to the then-U.S. Navy storage facility at Naval Air Station Litchfield Park, Arizona. Although the vast majority of the airframes were eventually scrapped, a number of examples were purchased as surplus. The surviving Tigercats were primarily used as water bombers to fight wildfires in the 1960s and 1970s and Sis-Q Flying Services of Santa Rosa, California, operated an F7F-3N tanker in this role until retirement in the late 1980s.

About the Pratt & Whitney R-2800-34W radial piston engines

The Pratt & Whitney R-2800 (US military designation) Double Wasp (civil designation) is an American twin-row, 18-cylinder, air-cooled radial aircraft engine with a displacement of 2,800 in³ (46 L), and is part of the long-lived Wasp family.

The R-2800 saw widespread use in many important American aircraft during and after World War II. During the war years, Pratt & Whitney continued to develop new ideas to upgrade the engine, including water injection for takeoff in cargo and passenger planes and to give emergency power in combat.

Photos from the early 1970s of Tanker 31, an F7F-3

air tanker F7F-3 N6177C
Tanker 31, F7F-3, N6177C. May, 1973.

(Originally published at 6:17 p.m. MDT June 24, 2019)

Today we have four more photos from the Flight Test Museum at Edwards Air Force Base — Tanker 31, an F7F-3 (N6177C). The hand-written notes on the back of the pictures say “Owned by Sis-Q Flying Service, Santa Rosa, California”. The photo from October, 1971 also says “Aero Union Corp., Chico, California”.

air tanker F7F-3 N6177C
Tanker 31, F7F-3, N6177C. October, 1971. The initials “JB” are on the back of the photo.
air tanker F7F-3 N6177C
Tanker 31, F7F-3, N6177C. March, 1972. The initials “JB” are on the back of the photo.
air tanker F7F-3 N6177C
Tanker 31, F7F-3, N6177C. May, 1973.

 

Photos of some of the first F7F-3 air tankers

(Originally published at 4:17 p.m. MDT June 20, 2019)

Today we have another couple of photos from the Flight Test Museum at Edwards Air Force Base — an F7F-3 (N7625C) registered to Fred Arnberg Inc out of Yreka, California. In these photos there is a small “2” on the tail and also on the nose wheel cover.

A photo at Goodall.com.au shows an F7F-3 registered to Fred Arnberg with the same N number but with different livery and a large “22” on the tail. That website says Arnberg operated the first F7F-3 Grumman Tigercats as air tankers for several seasons in the early 1960s. This particular aircraft was purchased February 27, 1962 and by September 24, 1962 had hit trees and crashed near Callahan, California.

F7F-3, N7625C
F7F-3, N7625C, registered to Fred Arnberg Inc out of Yreka, California.

In the photo below you can see painted on the underside of the right-side wing.

F7F-3, N7625C
F7F-3, N7625C, registered to Fred Arnberg Inc out of Yreka, California.

And here is one more F7F-3 known as Tanker 22. It is N7238C operated by Cal-Nat Airways out of Grass Valley, California. Other owners were Dick Gordon of Santa Rosa, California and Sis-Q Flying Service of Montague, California.

F7F-3 air tanker (N7238C)
F7F-3 air tanker (N7238C) operated in the 1960s by Cal-Nat Airways and other companies.

(UPDATED at 10 a.m. MDT June 20, 2019)

Bill Bailey sent us an email and the photo below:

N7635C had AERO on the top of the left wing and bottom of the right wing and it has AD on top of the right wing and under the left. There were 2 AERO AD F7F-3s, N7625C , which you posted and N7626C which was later owned by Cal-Nat, still painted all Red and marked as Tanker E-42.

I found the attached photo some years ago and don’t remember who took it.

By the way, that first photo solved a question among modelers that has raged for years ….. was AERO AD painted on top of the wings.

F7F-3, N7626C
F7F-3, N7626C, operated by Cal-Nat Airways, Grass Valley, California. Purchased around 1960 from Aero Ads Inc. skywriter. Sold to Sis Q Flying Service in 1969. (according to goodall.com.au). Photo by William T. Larkins at Oakland, CA., date unknown.

Thanks go out to Bill B.


(UPDATED at  4:46 p.m. MDT June 20, 2019)

JD Davis sent us additional photos of the F7F-3. Thanks JD!

DC-7, N7626 air tanker
F7F-3, N7626, Tanker 42. By JD Davis, who said tanker pilot Ed Real took it to the ‘California 1000’ Air Race at Mojave Nov, 1971 — Qualified it but didn’t race it.

Photos of two DC-7 air tankers from 1975

DC-7 air tanker, Tanker 60, N838D
DC-7 air tanker, Tanker 60, N838D, August, 1975 at Lancaster, CA.

(Originally published at 4:58 p.m. PDT June 17, 2019)

The Flight Test Museum at Edwards Air Force Base called and asked if we were interested in accepting some old photos of air tankers that they didn’t know what to do with. I said, “Of course!”

I’ll be posting some of them off an on over the next few days and weeks.

Today we have two DC-7 air tankers that were photographed in August, 1975. The locations on many of the photos say Lancaster, California, and that is the case for these.  There is no indication who took any of the photos. The aircraft model, N number, location taken, and the month/year are hand-written on the backs.

DC-7 air tanker, Tanker 69, N45W
DC-7 air tanker, Tanker 69, N4SW, August, 1975 at Lancaster, CA.

Most of the photos were taken while the aircraft were on the ground, a few show them airborne, and only a couple show them dropping water, which were probably a test flights.

If anyone has more information about these aircraft, such as what company operated them and the pilots who flew them, that would be great.


(UPDATED at 6:20 a.m. PDT June 18, 2019)

After getting more information in the comments from Tom Story and Jon (thanks folks), it turns out that there was an error in the hand written notation on the back of the Tanker 69 print. The N number should have been N4SW instead of N45W. I fixed the caption in the photo above.

And, like Tom said, the two DC-7s were operated by Butler, according to the information at Geoff Goodall’s Aviation website. In 2012, Tanker 60, N838D, was transferred to Erickson Aero Tanker and is still in operation.

Tanker 60 DC-7 Madras, Oregon
Chuck Rhodes, Erickson Aero Tanker Maintenance Supervisor, with Tanker 60, a DC-7 at Madras, Oregon, June 13, 2016. Photo by Bill Gabbert.

In his comment, Jon said, “Tanker 69 was the one lost on the way to Medford from Klamath Falls for the end of the season party in 1979. My dad knew most of them.” Here is some of the information he referenced at aviation-safety.net:

[On September 14, 1979] DC-7 “Tanker 69” departed Redmond, OR a company business flight to Medford, OR, with an en route stop at Klamath Falls, OR. The aircraft struck trees on the crest of Surveyor Mountain and crashed. The aircraft departed Redmond for Klamath Falls about 19:45 and arrived there at 20:29. Two passengers enplaned and the aircraft departed runway 14 at Klamath Falls at 20:40.The aircraft struck trees on the crest of the 6400 feet high Surveyor Mountain about 7 minutes after takeoff.

PROBABLE CAUSE: “The flight crew’s decision to undertake a direct point-to-point high-cruise-speed flight at low altitude. The crew’s judgment in the selection of a low-altitude flight profile may have been influenced by their familiarity with the terrain.”

CLASSIFICATION: Controlled flight into terrain.

Any crash of an air tanker is awful, usually killing two or three crew members, but in this case 12 people died — two crew members and 10 passengers. May they rest in peace.

The NTSB report can be found here.


(UPDATED at  4:46 p.m. MDT June 20, 2019)

JD Davis sent us additional photos of these aircraft. Thanks JD!

DC-7, N4SW air tanker
DC-7, N4SW, variously known as Tanker 19 or Tanker 69. Photo by JD Davis. At Ontario (ONT) Sept., 1974.
DC-7, N838D air tanker
DC-7, N838D, Tanker 60, by JD Davis. At San Bernardino (SBD) Oct. 17, 1999.