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Hydro lock

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wild.blue(at)verizon.net
Guest

Posted: Tue Feb 10, 2009 3:50 pm Post subject: Hydro lock

Time: 01:56:39 PM PST US

From: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net>

Subject: Re: Blackwell Exhaust

All true Nigel.  But what happens if the piston is already on the

Compression stroke while pulling the prop through and there is

Sufficient oil collected in the combustion chamber when the piston gets

To close to TDC?  Then it's too late for an opening exhaust valve to be

Of any benefit.

Dennis

Right you are, Dennis.  "Clean" kits are no cure-all, either.  If you feel

resistance, stop, pull plugs and drains.  Surprising how much will sometimes

be in a cylinder, clean kit or not.  DO NOT  try to clear the cylinder by

pulling the prop backward--only pushes the oil into the intake manifold so

it gets a second opportunity to bend your rods or blow a jug off.  Doubly so

with tailwheels.

Jerry Painter

Wild Blue Aviation

425-876-0865

JP(at)FlyWBA.com

www.FlyWBA.com

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vectorwarbirds(at)aol.com
Guest

Posted: Tue Feb 10, 2009 4:06 pm Post subject: Hydro lock

We stock both electric and manual oil tank shut off valves for radials.  We have never had oil in a cylinder since installing them on several aircraft.  But that does not mean that we don't pull it through!  The oil tank shut off valve will pretty much eliminate oil in the cylinders and hence hydraulic lock.   My CJ never has more than two ounces in the exhaust cans even after sitting for weeks.  Smartest thing you can do is install a shut off valve.

 

 Gary 'Bunndini' Bunn

 Vector Warbirds USA

 

   

 

   

 

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mark.bitterlich(at)navy.m
Guest

Posted: Tue Feb 10, 2009 4:21 pm Post subject: Hydro lock

I've seen several M-14's with these type valves installed and I could

not agree more.  Sergei Boriak had one on his SU-31, and it worked

flawlessly.  



Do you happen to sell a KIT?  The problem I usually have come across is

the hassle of interfacing an American made valve with the Russian hoses.

Do you sell adapters, etc.,etc?  



Mark Bitterlich

N50YK

 



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vectorwarbirds(at)aol.com
Guest

Posted: Tue Feb 10, 2009 4:38 pm Post subject: Hydro lock

Yes we can make up kits to fit anything, but just for your information the AN-12 303 hose fitting will fit the stock oil hoses and vise versa.  We usually put the stock metric oil hose fitting on AN 303 hose and use a AN-12 on the other end to interface with the valve since AN fittings are easier to come by than metric.  In other words there is no problem either way.

 

   

 

   

 

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ChangDriver

Joined: 15 Sep 2007
Posts: 266

Posted: Tue Feb 10, 2009 6:49 pm Post subject: Re: Hydro lock

How much are they??

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