I just had a brilliant idea.
Unbolt the DD15 turbo
and blow down turbine and bolt it on a Mazda p-port 3 rotor of around 500
HP.
If you can do that and show a legitimate .39 BSFC on the dyno the world
will beat a path to your door.
Paul Lamar
I know you can come up with a quick and dirty turbo compound Paul. Don't
quit on the idea. Maybe this is it.
Van
I think so. It might not be perfect but it can be optimized after the
principle is demonstrated.
Paul Lamar
Big truck junkyard. I can get a whole older engine for $5K. They sell
removed parts too.
Kevin Alderman
The DD15 has only been around for 3 years or so.
Paul Lamar
Steve again
How sensitive to exhaust back pressure are diesel engines?
I wonder what order of restriction the Axial Power Turbine would introduce and how a
rotary will respond?
Obviously 13, 20B's have been happy with driving a turbo turbine but how do they
compare with an axial power turbine?
Steve Izett
Well here is some old NACA data on the subject of back pressure on TC engines.
Sorry about the crappy copy but what do you expect from government work?
I tried to clean it up but it is tedious work.
-----------------------------------------------------------------
Here is the complete raw original paper.
Somewhat easier to read the numbers.
It looks like the net power continues to increase up to a back pressure of 50 inches
of Hg.
Paul Lamar
Hi Paul
That back pressure info is interesting.
I'm still thinking that your idea is worth pursuing particularly IF the clutch
arrangement is part of the unit and not separately built into the block somewhere is.
Ready made gearbox without clutch could still present a significant hurdle.
If it is one unit, GOLD.
If someone can find one and belt it up, then leave the turbo off. Just focus on the
compounding.
Just connect it NA. That way we could see the HP benefits and get a bonus muffler.
Once that is established, add in a turbo upstream.
Steve Izett
The fluid clutch is part of the gear box.
BTW that NACA tech paper is on the web site for download if you don't have it.
http://www.rotaryeng.net/naca-report-822.pdf
This truly is a wonderful way to demonstrate the advantages of the turbo compound
rotary at relatively low cost. The key is the rotaries lack of exhaust valves.
Piston engines exhaust valves waste up to 50% of the kinetic energy in the exhaust.
That is why exhaust valves fail so often in aircraft engines.
We just need to find a engine dyno and 3 rotor p-port engine that will handle 600 HP.
I'll contact Jim Mederer at Racing Beat and see what he will charge to to assemble
the engine and test it on the dyno. He already has built a turbo p-port 3 rotor that
would be suitable for this amount of power. He may still have it or has access to it.
Pictures of that engine are attached.
We will also entertain competitive bids from anyone else that has the credibility to
do the job.
BTW I also have a complete 3 rotor engine with sequential turbos sitting in the
hangar that I will loan for a credible effort. We must however come up with
sufficient prior funding.
Paul Lamar
--
The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site.
http://www.rotaryeng.net
You Tube key word PaulLamar2
Copyright 1998-2012 All world wide rights reserved.
