Hi bill
I had a rotary engine rebuilder here in Australia do the boring and placement of the p ports, I could find out exactly where they were placed if you like, as for the extra ports they were jammed with aluminium foil to a depth of approx 20 mm from the iron surface and then jb weld filled theme approx .5mm from the surface. The water jackets directly around the ports were also filled with job weld flush with the housings, so far to date I have pulled the engine apart after about 60 hrs to rectify a heating issue I had ( my fault, when I rebuilt it originally I had swapped the rotors around doh, was getting warmer than it should due to more exhaust overlap)
I'll see if I can find some pictures of my ports before I installed them
Cheers
Sent from my iPad
Christian,
While you are doing that, you could also
include some info on your pporting of the Renesis. How did you know where
to bore the holes for proper timing and how did you seal the water
jacket? I assume that you just plugged up the original ports with JB weld
or something?
Thanks,
One of the other Bills
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent: Wednesday, October 07, 2015
9:04 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: To P or
not...
can you give details
on your custom built hotdog with inox? baffling.
Sent: Tuesday, October 06,
2015 11:08 PM
Subject:
[FlyRotary] Re: To P or not...
I would agree, yes it
worked out to be allot more simpler running 2 x 2" runners than playing
with 4 in my opinion and easier to manufactur etc
From modifying my
engine from a not so good 6 port intake to a simple 2 port intake I gained a
good 30-40 hp and 15 k top end
The noise also isn't
that bad on my renises as I've attached a custom built hotdog underneath with
inox baffling which works well
Trying to ensure I
have a complete knowledge before I make my decision,
The P port as shown
for the website is exactly what we are looking for. Straight forward power at
high rpm. The noise is a factor of energy output which is the same.
If I tune a 4 port
runner system and get x amount of air into the engine I give y amount of fuel
and I have z amount of power and engine exhaust/noise to handle.
If I use a P port and
get x amount of air and give y amount of fuel it is the exact same z
output. It was just easier to get x amount of air into the system.
Or am I completely off
base.
Bob,
One thing that everyone should get clear is that for aircraft PPorts are almost
always superior. At higher RPMs. Also Pports will idle just fine. Good balance
and vibration control are the key to good idle. The engine won't make a lot of
power at low rpm but that isn't a problem for an aircraft. The rotary makes a
better aircraft engine than a car engine!
Bill Jepson
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