Jet turbine starting equipment ?

Hi. Could not find a proper group to ask, sorry :
The old Boeing 707 and perhaps others had a tiny 3000+ psi air
compressor on board driven by a hydraulic motor to start engines with
NO ground equipment assist.
Which current aircraft have a similar compressed air starting system
on board ?
Thanks.

Externet wrote in news:a78f196e-92e0-46d3-9c4d-
:

Hi. Could not find a proper group to ask, sorry :
The old Boeing 707 and perhaps others had a tiny 3000+ psi air
compressor on board driven by a hydraulic motor to start engines with
NO ground equipment assist.
Which current aircraft have a similar compressed air starting system
on board ?
Thanks.

No civil AC I know of, except some russian light planes.

Bertie

Externet writes:

The old Boeing 707 and perhaps others had a tiny 3000+ psi air
compressor on board driven by a hydraulic motor to start engines with
NO ground equipment assist.

What drove the hydraulic motor?

On May 9, 4:44*pm, Mxsmanic wrote:
NO ground equipment assist.

What drove the hydraulic motor?

The Transfunctioner G. Transport jets use both engine driven and
electric hydraulic pumps. I have never started a jet with compressed
air. Have you BTB ?
Frank

"F. Baum" wrote in news:c41f80e7-c680-47f1-8611-
:

On May 9, 4:44*pm, Mxsmanic wrote:
NO ground equipment assist.

What drove the hydraulic motor?

The Transfunctioner G. Transport jets use both engine driven and
electric hydraulic pumps. I have never started a jet with compressed
air. Have you BTB ?
Frank


No. I knew a guy who ferried a lot of them and he's done it. IIRC he says
it's all pretty quick! My company uses an umbilical every now and again.


Bertie

"Robert Moore" wrote

I have done numerous "high pressure" starts in the old B-707. The air
compressor filled a "high pressure tank" and the tank then was sufficient
to start just one engine. After that, that engine's bleed air was used to
start the remaining engines.

Did the 707 not have an onboard APU?
--
Jim in NC

"Morgans" wrote in
:


"Robert Moore" wrote

I have done numerous "high pressure" starts in the old B-707. The air
compressor filled a "high pressure tank" and the tank then was
sufficient to start just one engine. After that, that engine's bleed
air was used to start the remaining engines.

Did the 707 not have an onboard APU?

Some did. Most not.


Bertie

Robert Moore wrote in
46.128:

"Morgans" wrote
Did the 707 not have an onboard APU?

None in regular airline service. I have seen a couple of
707s converted to corporate service where the forward cargo
hold was converted to hold a retractable APU that was pulled
outside the cargo door for engine starts and then shut-down
and stowed away.


I've een told, but haven't seen, that some have the 727 type installation.


Bertie

On May 9, 7:59*pm, Bertie the Bunyip wrote:
None in regular airline service. I have seen a couple of
707s converted to corporate service where the forward cargo
hold was converted to hold a retractable APU that was pulled
outside the cargo door for engine starts and then shut-down
and stowed away.

I've een told, but haven't seen, that some have the 727 type installation.

Bertie

I understand the 727 was originaly designed without an APU and they
squeezed one into the wheel well. This was the main reason it couldnt
be used inflight. This was from a systems instructor who had alot of
folklore on the 727 (Including the picture of 30 or so people hanging
on the airstair inflight during the fall of Siagon).
FB

"F. Baum" wrote in
:

On May 9, 7:59*pm, Bertie the Bunyip wrote:
None in regular airline service. I have seen a couple of
707s converted to corporate service where the forward cargo
hold was converted to hold a retractable APU that was pulled
outside the cargo door for engine starts and then shut-down
and stowed away.

I've een told, but haven't seen, that some have the 727 type
installation.


Bertie

I understand the 727 was originaly designed without an APU and they
squeezed one into the wheel well. This was the main reason it couldnt
be used inflight. This was from a systems instructor who had alot of
folklore on the 727 (Including the picture of 30 or so people hanging
on the airstair inflight during the fall of Siagon).


Could be. I only flew th e200 and they all had them. Of course, you
didn't really need one in flight anyway. There were plenty of electrics
available from the three engines anyway.

Bertie