Return-Path: Received: from [199.185.220.240] (HELO priv-edtnes46.telusplanet.net) by logan.com (CommuniGate Pro SMTP 4.1.1) with ESMTP id 2531778 for flyrotary@lancaironline.net; Mon, 18 Aug 2003 02:05:55 -0400 Received: from Endurance ([209.53.248.90]) by priv-edtnes46.telusplanet.net (InterMail vM.5.01.05.17 201-253-122-126-117-20021021) with SMTP id <20030818060551.ZSXS2283.priv-edtnes46.telusplanet.net@Endurance> for ; Mon, 18 Aug 2003 00:05:51 -0600 From: "Haywire" To: "flyrotary" Subject: EWP seized Date: Sun, 17 Aug 2003 23:05:44 -0700 Message-ID: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001B_01C36514.1686A520" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.2416 (9.0.2910.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 Importance: Normal This is a multi-part message in MIME format. ------=_NextPart_000_001B_01C36514.1686A520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Hi Guy's I promised to report fairly on this EWP installation, so here is the bad news. As it's performance up to now as been very promising, I'm by no means ready to abandon the idea. I went to the airport this afternoon to take care of a few minor items, then decided to pull it out to do another full power (30"MAP, no boost) run-up just to confirm cooling performance. I only ran it for 4 minutes and satisfied with the performance of the system, I reduced to an idle to let it cool. Coolant temps began to drop from 100C (212F) and I turned my attention to other items. About 1-2 minutes later I scanned the instruments and noticed that the coolant temp was up to 115C (240F). A quick look at the fuse panel showed the LED indicating a blown fuse for the EWP. I shut down and quickly changed the fuse, then resumed power to the EWP without starting the engine. I couldn't immediately tell if it was pumping as the mechanics for a commuter airline that I share hangar space with were doing a run-up on a 1900 making too damn much noise for me to hear the pump. When the temps didn't begin to lower, I put on some heavy gloves and released the pressure from my cap. Once I had it opened I was able to add water with a hose, while squeezing the lower coolant hoses in an effort to burp out some steam and replace with cooler water. At this point it was very apparent from the lack of flow that the pump was not pumping. After temps had subsided, I pulled it back inside where it was quieter and could tell that the pump was not turning at all, however it hadn't blown the new fuse? After temps had cooled a little more, I drained the coolant and removed the EWP. The impellor was seized solid, I couldn't budge it at all. I took it home with me to pack it up to send back for warranty, but when I got home I took another look at it and it was no longer seized. I hooked it up with a couple of 1" hoses and a 5 gal bucket of water. It works fine pumping approx 14 usgal/min. It been running like that now for almost 3 hours with no problems. I do find that the motor gets too hot to hold your hand on continuously, but it has been like that since I first used it. While I don't really like this motor high temp, I realize it is not uncommon for small motors so I wasn't too concerned. Now I wonder if it was a factor, combined with under cowl temps from my run-up. I'm not certain what to do next. I'm not sure if Davies Craig will warranty this as it appears to work now, however I'm not certain that I want to fly with this one either. I'm definitely not prepared to give up on the EWP, but I just want to make sure I've got a good one for flight. As I've been trying to get my inspection for several weeks now, and he may be coming up in the next few days, I'd like to reinstall it for the inspection to get it over with. I've sent this report to Leon, hoping that he can check directly with Davies Craig about this and see if they can send me a replacement, and I will return this one as soon as I receive it. I'd really hate to turn away the inspector if he wants to come up this week. S. Todd Bartrim Turbo 13B RV-9Endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Whatever you vividly imagine, Ardently desire, Sincerely believe in, Enthusiastically act upon, Must inevitably come to pass". ------=_NextPart_000_001B_01C36514.1686A520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Guy's
    I promised to report = fairly on this=20 EWP installation, so here is the bad news. As it's performance up to now = as been=20 very promising, I'm by no means ready to abandon the idea.=20
    I=20 went to the airport this afternoon to take care of a few minor items, = then=20 decided to pull it out to do another full power (30"MAP, no boost) = run-up just=20 to confirm cooling performance. I only ran it for 4 minutes and = satisfied with=20 the performance of the system, I reduced to an idle to let it cool. = Coolant=20 temps began to drop from 100C (212F) and I turned my attention to other = items.=20 About 1-2 minutes later I scanned the instruments and noticed that the = coolant=20 temp was up to 115C (240F). A quick look at the fuse panel showed the = LED=20 indicating a blown fuse for the EWP. I shut down and quickly changed the = fuse,=20 then resumed power to the EWP without starting the engine. I couldn't=20 immediately tell if it was pumping as the mechanics for a commuter = airline that=20 I share hangar space with were doing a run-up on a 1900 making too damn = much=20 noise for me to hear the pump. When the temps didn't begin to lower, I = put on=20 some heavy gloves and released the pressure from my cap. Once I had it = opened I=20 was able to add water with a hose, while squeezing the lower coolant = hoses in an=20 effort to burp out some steam and replace with cooler water. At = this point=20 it was very apparent from the lack of flow that the pump was not = pumping.=20  After temps had subsided, I pulled it back inside where it was = quieter and=20 could tell that the pump was not turning at all, however it hadn't blown = the new=20 fuse?
   =20 After temps had cooled a little more, I drained the coolant and removed = the EWP.=20 The impellor was seized solid, I couldn't budge it at all. I took it = home with=20 me to pack it up to send back for warranty, but when I got home I took = another=20 look at it and it was no longer seized. I hooked it up with a couple of = 1" hoses=20 and a 5 gal bucket of water. It works fine pumping approx 14 usgal/min. = It been=20 running like that now for almost 3 hours with no problems. I do find = that the=20 motor gets too hot to hold your hand on continuously, but it has been = like that=20 since I first used it. While I don't really like this motor high temp, I = realize=20 it is not uncommon for small motors so I wasn't too concerned. Now = I wonder=20 if it was a factor, combined with under cowl temps from my=20 run-up.
   =20 I'm not certain what to do next. I'm not sure if Davies Craig will = warranty this=20 as it appears to work now, however I'm not certain that I want to fly = with this=20 one either. I'm definitely not prepared to give up on the EWP, but I = just want=20 to make sure I've got a good one for flight. As I've been trying to get = my=20 inspection for several weeks now, and he may be coming up in the next = few days,=20 I'd like to reinstall it for the inspection to get it over with.=20
    I've sent this report = to Leon,=20 hoping that he can check directly with Davies Craig about this and see = if they=20 can send me a replacement, and I will return this one as soon as I = receive it.=20 I'd really hate to turn away the inspector if he wants to come up this=20 week.
 

S. Todd Bartrim
Turbo 13B = RV-9Endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

=   =20 "Whatever you vividly imagine, Ardently desire, Sincerely believe in,=20 Enthusiastically act upon, Must inevitably come to pass".

 
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