flyrotary@lancaironline.net Mailing List Archive

Kevin,

I would have to agree with Bill here.

Even with the throttle on the carb completely closed any vacuum leaks could cause the engine to over rev without a load.

I tried a Weber carb at first on my 13B but had trouble with it.

You need to have an adjustable fuel regulator and be able to set the fuel pressure just right or the fuel pump will over power the float and cause excessive fuel to be delivered.

And getting the jetting right is a tedious trial and error process.

I found the EFI to be much easier to get working.

YMMV.

Jim
--- On Tue, 1/5/10, Bill Schertz <wschertz@comcast.net> wrote:

From: Bill Schertz <wschertz@comcast.net>
Subject: [FlyRotary] Re: first start check list
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Date: Tuesday, January 5, 2010, 10:01 AM

Kevin,

DON'T start it without a prop or club on the engine, too easy to overrev it. (Are you sure the rev limiter works?) There have been several engine ruined this way.

If you start it with plain water, be sure to COMPLETELY drain and dry it after the test, I had done water pump tests with water, drained it, but enough held up to cause corrosion internally. Really should have the corrosion inhibitors of antifreeze in it.

FWIW

Bill Schertz
KIS Cruiser #4045
N343BS
Phase I testing

From: kevin lane

Sent: Monday, January 04, 2010 10:59 PM

To: Rotary motors in aircraft

Subject: [FlyRotary] first start check list

I am just about ready to try my first attempt at starting my renesis. for my first phase, at least, I've chosen to use a side draft Weber carb and DIS ignition system, which Lynn designed using an MSD ign box for the primaries and 2 Chrysler elec ign's for the trailing plugs. I thought I'd ask before introducing gasoline to my "creation" of any steps or checks I need to do first. the engine and mount are bolted to a mockup plywood firewall held up with steel legs. the psru is installed, as well as the radiators [oil & water]. exhaust is just headers for now [pointing down]. when I crank it over all the plugs are firing [especially the MSD powered ones, which fire multiple times below 1000rpm]. the carb is brand new, with whatever jets they come with. haven't designed a leaning capability yet.

1. I need to add a oil pressure gauge right away. I'll need water temp after it gets running for any length of time. put mineral oil in for initial break-in [turrentine engine, never run]

2. oh yeah, get it out of the basement! guess airport best for making lots of noise

3. fire extinguisher

4. got the 6k rpm limiter plugged in to the MSD

5. fill with water

6. fabricate some remote throttle cable? or do you just stand there and manipulate it by hand?

guess I fine tune timing after it is running with a strobe light? I've marked the firing points on the flexwheel. the pick-ups can be adjusted some if needed.

I assume I don't need a prop or club at this point, right?

thought a small gravity fed fuel tank would work at first.

should I buy new plugs? the used ones that came with the engine seem to spark OK.

could I run this early on with the water pump attached to say a 50 gallon tank of cold water rather than trying to get it radiator cooled?

kevin [it won't be loud, will it? ☺]