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ptag.dev(at)tiscali.co.uk
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 Posted: Sat Jan 23, 2010 2:42 pm Post subject: Wondering Jab 3300 etc. |
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Hi! Graham.
The return fuel line will need to be severely restricted or it will take priority over the regulator.
Regards
Bob Harrison G-PTAG Now with 914 Rotax
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Graham Singleton
Sent: 23 January 2010 00:55
To: europa-list(at)matronics.com
Subject: Re: Europa-List: Wondering
On 22/01/2010 22:11, jimpuglise(at)comcast.net (jimpuglise(at)comcast.net) wrote:
EGT and CHT are all you will need to be careful of. I am in the middle of installing a 3300 in mine; am going the Sensenitch prop as John has. One of the secrets seems to be the amount of twist in the prop near the hub, so that it throws a lot of air into the cooling ports. This is why the Senesenitch is recommended. I don't know anything about the Whirlwind. Ther are several Jabs. flying in the US with excellent performance. Many of the problems have been in monos or with VP props.
Jim Puglise A-283.
Carburation affects cooling. The carb needs air going straight in evenly, a smooth elbow into the carb doesn't work, different air velocity across the inlet which causes different mixture in the front and rear cylinders, (I'm thinking aloud here) could be that turbulent flow is needed. A plenum that feds straight not curved seems to work better. A box with in and out tubes (at)90deg works. Turbulence might help evaporate the fuel droplets spraying into the inlet manifolds. Drops won't go round corners.
There's a guy in UK who worked this out, Anthony Higgins but I don't have his contact details, ((at)#%$^&windoze crash  Rally driver and Europa builder. Are you there Tony?
Tony helped cure an overheating Jab 6, I spent hours on it and failed.
Which reminds me, I recommend you fit a fuel bleed back downstream of th engine driven pump. Pump is bolted to the engine and will get hot, fuel vaporisation is a possibility. One accident due to this suspected, not yet proven. Fuel was Avgas.
Graham 0123456789
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grahamsingleton(at)btinte
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| Posted: Sat Jan 23, 2010 3:18 pm Post subject: Wondering Jab 3300 etc. |
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On 23/01/2010 22:41, Robert C Harrison wrote: | Quote: | v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <![endif]--> <![endif]--> Clean Clean DocumentEmail false false false MicrosoftInternetExplorer4 <![endif]--> <![endif]--> st1\:*{behavior:url(#default#ieooui) } <![endif]--> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} <![endif]--> <![endif]--> <![endif]-->
Hi! Graham.
The return fuel line will need to be severely restricted or it will take priority over the regulator.
Regards
Bob Harrison G-PTAG Now with 914 Rotax
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Bob
didn't know there was a regulator on a Jab6? It has to be restricted anyway hence the name "bleed"
Graham
[quote][b]
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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