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Engine basics => Engine set up tips => Topic started by: Allen Eshleman on August 04, 2009, 04:31:26 PM

Title: B 40 Needle Valve
Post by: Allen Eshleman on August 04, 2009, 04:31:26 PM

I am breaking in a new Brodak 40.  I put it on an old profile plane as a test stand.  It starts easily.  I have run it 6 times for 6 1/2 minutes. 

However, the needle valve does not stay in one place.  How can I tighten it?

Title: Re: B 40 Needle Valve
Post by: Jim Oliver on August 04, 2009, 04:45:42 PM

There should be/have been a locking collar (nut) for the needle valve which, when installed properly, will allow the N V to be adjusted but retain the selected position by applying pressure to the spraybar into which the N V fits..........  

http://www.brodak.com/shop.php?pageNum_ProductInfo=5&totalRows_ProductInfo=93&CategoryID=63
http://www.brodak.com/shop_productdetail.php?ProductID=6277

The bottom link should show a close-up view..........
Cheers,
Jim

Title: Re: B 40 Needle Valve
Post by: Allen Eshleman on August 06, 2009, 06:17:42 AM

Thanks Jim,
      I tightened it up.  It now has 15 short runs.  Five or so more to go and it will fly.  I have it on a very old "Cosmic Wind for break - in.  The profile format made an easy test stand.  I will fly it there for awhile.  Then it is destined for a Nobler.