Bald Eagle Aviation

[PeterA]

Rich

You see it can be done!

hope you followed the notes i sent very carefully!

well done ,just got to get it back in now

regards

fred

Yeah, but cutting a hole in the firewall is cheating.

PeterA

[Matt Gunsch]

but at least you didn't have to pull the fuel tanks to get to a valve you can see thru a access hole, but does not allow you access to remove it, just to see it............

[Lynn Allen]

Rich, what kinds of signs did you all see that made you pull the pump??

Thanks,

Lynn

[51fixer]

but at least you didn't have to pull the fuel tanks to get to a valve you can see thru a access hole, but does not allow you access to remove it, just to see it............

Ours incorporates a MK 19 mod that adds an access panel that allows you enough room to replace that pump and fix issues down there.
Rich

[51fixer]

Rich, what kinds of signs did you all see that made you pull the pump??

Thanks,

Lynn

Failed a couple air compressors due to lack of lubrication. Also has had an oil leak where you can't access it.
Rich

[Lynn Allen]

Rich, what kinds of signs did you all see that made you pull the pump??

Thanks,

Lynn

Failed a couple air compressors due to lack of lubrication. Also has had an oil leak where you can't access it.
Rich

Roger that and thanks.. Is it something that can be O/H here in the states or do we swing by Ace/Napa aircraft parts and supplies??

Lynn

[51fixer]

Rich, what kinds of signs did you all see that made you pull the pump??

Thanks,

Lynn

Failed a couple air compressors due to lack of lubrication. Also has had an oil leak where you can't access it.
Rich

Roger that and thanks.. Is it something that can be O/H here in the states or do we swing by Ace/Napa aircraft parts and supplies??

Lynn

How do you pronounce NAPA with a British accent?
Rich

[Matt Gunsch]

but at least you didn't have to pull the fuel tanks to get to a valve you can see thru a access hole, but does not allow you access to remove it, just to see it............

Ours incorporates a MK 19 mod that adds an access panel that allows you enough room to replace that pump and fix issues down there.
Rich

In my case, it was a Spit XVI, and it was a gear shuttle valve. There is a panel between the gear, you can see the valve, but that is all.

[PeterA]

[/quote]
How do you pronounce NAPA with a British accent?
Rich[/quote]

"Nay-pore"...old chap.



.

[Chris]

Of course you know that ACE is merely an acronym for "aircraft components and equipment" .

[Jim Beasley]

With any luck we found the problem. A gasket on the vacuum pump didn't have an oil feed hole in it, and this is the feed to the air compressor that was blocked. The vacuum pump has a spacer plate and it has a gasket between the bottom of the plate and the gearbox. Considering what it took to get the spacer plate off, and then what it looked like, it was done long long ago and was probably not apart since the 1980's. This plane had to have had a dry (unlubed) air compressor since this gearbox was rebuilt, presumably by the Arnold folks.

follow the finger to where the hole should be on the gasket, and where the air compressor oil feed hole is on the gearbox:


This may also explain why this plane was flown so little in the 80's and 90's and then stored. We figure it was routinely lunching air compressors. Anyone remember why SM969 was parked after the initial rebuild and then after it flew in 1992?

jb

Rich, what kinds of signs did you all see that made you pull the pump??

Thanks,

Lynn

Failed a couple air compressors due to lack of lubrication. Also has had an oil leak where you can't access it.
Rich

Roger that and thanks.. Is it something that can be O/H here in the states or do we swing by Ace/Napa aircraft parts and supplies??

Lynn

[Yak 11 Fan]

It was parked in 92 in a container (with the rest of the collection) after Doug Arnold died.
None of the aircraft flew very much.

[Airplanejunkie]

With any luck we found the problem. A gasket on the vacuum pump didn't have an oil feed hole in it, and this is the feed to the air compressor that was blocked. The vacuum pump has a spacer plate and it has a gasket between the bottom of the plate and the gearbox. Considering what it took to get the spacer plate off, and then what it looked like, it was done long long ago and was probably not apart since the 1980's. This plane had to have had a dry (unlubed) air compressor since this gearbox was rebuilt, presumably by the Arnold folks.

follow the finger to where the hole should be on the gasket, and where the air compressor oil feed hole is on the gearbox:

Awright...I'll display my ignorance of warbird systems and ask:

What does this airplane use compressed air for? Is it for pneumatic gear, flaps and/or starter, or something totally different? How common is this in WWII era (piston) warbirds?

I have virtually no warbird experience, and I personally haven't encountered pneumatic systems in smaller aircraft except on the Yak 52 (all pneumatic) and a Wilga (pneumatic starter.) Is this system similar to those aircraft or are we talking about something totally different.

Just curious.

Steve

[Jim Beasley]

The air system provides energy for the brakes, coolant doors, guns and flaps. Hydraulics only does the landing gear. Electric starter. The air system is pretty typical for British aircraft and the Rooskies took the idea for their Yaks and MiGs.

[/quote]

Awright...I'll display my ignorance of warbird systems and ask:

What does this airplane use compressed air for? Is it for pneumatic gear, flaps and/or starter, or something totally different? How common is this in WWII era (piston) warbirds?

I have virtually no warbird experience, and I personally haven't encountered pneumatic systems in smaller aircraft except on the Yak 52 (all pneumatic) and a Wilga (pneumatic starter.) Is this system similar to those aircraft or are we talking about something totally different.

Just curious.

Steve[/quote]

[Airplanejunkie]

What was the philosophy behind this?

In the case of the Yak, I was under the (very possibly wrong!) impression that they used pneumatics because pneumatics fare better than either hydraulics or batteries in extremely cold conditions.

I'm wondering about the advantages to using pneumatics over hydraulic and/or electric actuators, especially since it introduces an additional system into the equation.

Thanks,

Steve

The air system provides energy for the brakes, coolant doors, guns and flaps. Hydraulics only does the landing gear. Electric starter. The air system is pretty typical for British aircraft and the Rooskies took the idea for their Yaks and MiGs.

[/quote][/quote]