Return-Path: Received: from ms-smtp-01.southeast.rr.com ([24.93.67.82] verified) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2546718 for flyrotary@lancaironline.net; Mon, 25 Aug 2003 21:26:46 -0400 Received: from o7y6b5 (clt78-221.carolina.rr.com [24.93.78.221]) by ms-smtp-01.southeast.rr.com (8.12.5/8.12.2) with SMTP id h7Q1JG4Q017642 for ; Mon, 25 Aug 2003 21:19:19 -0400 (EDT) Message-ID: <000f01c36b70$d6dfb480$1702a8c0@WorkGroup> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Ready to fly Date: Mon, 25 Aug 2003 21:24:47 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01C36B4F.4F8AF100" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01C36B4F.4F8AF100 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageHi Rusty, Looks like things are getting all sorted out - only leaves flying = {:>). I get between 30 and 50 hours on the Stock Mazda plugs running 100LL 99% = of the time. I found out that having a resistor spark plug wire as well = as the resistor plugs apparently degrades the spark energy sufficiently = to limit me to 20 hours on plugs. However, once I swapped out the = resitor plug wire for the "spiral wrapped" wire, the life of the plugs = appears to have increased. They don't burn up or even become heavily fouled, when your rpm drops a = bit and the EGT on a rotor drops around 300F you know its time to change = the plugs. Its intermittent and is sure to happen where it can make you = pucker the most. After the first half dozen times it happens its not = that bad as you know what it is - the infamous SAG! (Sparkplug = Attention Getter!). It appears (Ed Anderson's theory) that the lead = eventually causes the ceramic cone to become coated with lead = metal/crystals. They eventually reach the point where they bleed off = some of the spark energy as it is building on the electrodes in the = milli(micro) seconds to get sufficient voltage to jump the gap. This = bleed off sometimes causes the plug not to fire and when it starts = happening frequently you loose power and EGT (I guess the EGT decreases = because unburned fuel is cooling the header?) Anyhow, nothing to worrry about if you have less than 20 hour on the = plugs. I also used to carry autogas to the airport which was a pain, = but decided that one fuel fire was sufficient for a life time and now go = the safer route of having a grounded truck/fixed installation for my = refuling. Ed ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Monday, August 25, 2003 9:07 PM Subject: [FlyRotary] Ready to fly Greetings, I fixed my brake line today, taxied around, transferred some fuel, = swung the compass, cleaned the canopy, etc. Nothing left to do but hope = my Lightspeed headset makes it back from repair, strap on the Nomex, and = parachute, then see if it flies. Probably Sat. =20 In engine news, I still have some issues around the staging point. = The engine doesn't threaten to quit. It just isn't smooth. I sent the = injectors off to RC Engineering today, and they'll have them Wednesday. = At least by sometime next week, I should know the true flow rate of the = underachieving MSD's. If they really don't flow what they're supposed = to, It's possible that RC Engineering can modify them to flow the same = as the stock Mazda's. If that's the case, I'll probably have them do = it. It would sure be nice to have matching injectors. =20 A question for Ed, and anyone else who uses 100LL regularly. How many = hours do you get on your plugs? Do they burn up, or just get fouled? = Can they be cleaned? =20 I've been running premium auto fuel, but it's almost $1.90/gallon, and = a big pain to haul around, not to mention dangerous. I'm thinking that = 100LL would be even better for the turbo than 93 octane premium, but I = don't want to have fouled plugs all the time. How many people are using = 100LL? Thanks, Rusty (6+ hours on the engine, and feeling bad about kidding Tommy = about his high pre-flight time) ------=_NextPart_000_000C_01C36B4F.4F8AF100 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Hi Rusty,
 
    Looks like things = are getting=20 all sorted out  - only leaves flying {:>).
 
I get between 30 and 50 hours on the = Stock Mazda=20 plugs running 100LL 99% of the time.  I found out that having a = resistor=20 spark plug wire as well as the resistor plugs apparently degrades the = spark=20 energy sufficiently to limit me to 20 hours on plugs.  However, = once I=20 swapped out the resitor plug wire for the "spiral wrapped" wire, the = life of the=20 plugs appears to have increased.
 
They don't burn up or even become = heavily fouled,=20 when your rpm drops a bit and the EGT on a rotor drops around 300F you = know its=20 time to change the plugs.  Its intermittent and is sure to happen = where it=20 can make you pucker the most.  After the first  half dozen = times it=20 happens its not that bad as you know what it is - the infamous = SAG! =20 (Sparkplug Attention Getter!).  It appears (Ed Anderson's theory) = that the=20 lead eventually causes the ceramic cone to become coated with lead=20 metal/crystals.  They eventually reach the point where they bleed = off some=20 of the spark energy as it is building on the electrodes in the = milli(micro)=20 seconds to get sufficient voltage to jump the gap.  This bleed off=20 sometimes causes the plug not to fire and when it starts happening = frequently=20 you loose power and EGT (I guess the EGT decreases because unburned fuel = is=20 cooling the header?)
 
Anyhow, nothing to worrry about if you = have less=20 than 20 hour on the plugs.  I also used to carry autogas to the = airport=20 which was a pain, but decided that one fuel fire was sufficient for a = life time=20 and now go the safer route of having a grounded truck/fixed installation = for my=20 refuling.
 
Ed
 
 
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Monday, August 25, 2003 = 9:07=20 PM
Subject: [FlyRotary] Ready to = fly

Greetings,
 
I fixed my = brake line=20 today, taxied around, transferred some fuel, swung the compass, = cleaned the=20 canopy, etc.  Nothing left to do but hope my Lightspeed headset = makes it=20 back from repair, strap on the Nomex, and parachute, then see if it=20 flies.  Probably Sat. 
 
In engine = news, I still=20 have some issues around the staging point.  The engine doesn't = threaten=20 to quit.  It just isn't smooth.  I sent the injectors off to = RC=20 Engineering today, and they'll have them Wednesday.  At least by = sometime=20 next week, I should know the true flow rate of the underachieving = MSD's. =20 If they really don't flow what they're supposed to, It's possible that = RC=20 Engineering can modify them to flow the same as the stock = Mazda's.  If=20 that's the case, I'll probably have them do it.  It would = sure be=20 nice to have matching injectors. 
 
A question = for Ed, and=20 anyone else who uses 100LL regularly.  How many hours do you get = on your=20 plugs?  Do they burn up, or just get fouled?  Can they be=20 cleaned? 
 
I've been = running premium=20 auto fuel, but it's almost $1.90/gallon, and a big pain to haul = around, not to=20 mention dangerous.  I'm thinking that 100LL would be even better = for the=20 turbo than 93 octane premium, but I don't want to have fouled plugs = all the=20 time.  How many people are using 100LL?
 
Thanks,
Rusty (6+ = hours on the=20 engine, and feeling bad about kidding Tommy about his high pre-flight=20 time)
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