I am at present checking into the possibility of using such engines for
my Zenith 750. I just started the kit, but it will not take me long.
Past suggestion to me indicated a single rotor 13b is what I need. I
need about 125 HP + or - ??? The airframe can accept up to 140 HP and
max 280 lbs. 2 rotors may be too heavy ?
By going this route, I am really stretching the word "experimental"
What I am looking for
1) an engine, and who can overhaul it to aircraft standard.I hear these
engines are almost as fuel tolerant as turbines. So can I pour anything
flammable into the gas tank?
2)engine mount and redrive.(I don't want to go near anything made in
China!) Standard Cont 0-200 mount I just send the factory a cheque!
3) ignition system and fuel injection system, (do I need to mix oil with
gas? what oil are being used for lubing the tip seals?) Canadian company
called EM-3
4) the spec for radiator cabin heater and muffler,I want a warm and
quiet airplane.
5) a rough price for the everything Fire Wall Forward. What about
insurance ?? I already know if it is the FAA in the US, an engine like
this , they would stick the builder with 40 hours of testing instead of
25 hours. So I fly a week more.
The standard engine for this bird is Cont 0-200, 100 HP, but this bird
will eventually go on floats, so the extra power will be needed.
I am buying the Aviator's Guide to Mazda Rotary Conversion soon.
The other choices of engines are Corvairs (120HP), Rotex 912 S (used)
100HP, Viking Honda Fit engine, Lycoming 0-320 150 HP, but I hate the
expensive 1940 technologies.
Thanks for your help.
Tony Lam
An 801 is more suitable for a 2 rotor. See attached pictures.
Contact Richard Sohn for a one rotor for a 750.
Richard Sohn <res12@fairpoint.net>
N2071U
www.fairpoint.net/~res12/home.html
1) Many people can overhaul it as stock is well up to or exceeds aircraft
standards.
Gasoline is required. Best is P-port.
Read: http://www.rotaryeng.net/fund-of-intake.html
2) Engine mount DoRite in Ventura Ca. Any tig welding shop.
Read: http://www.rotaryeng.net/mm-instruct.html
Redrive: Real World Solutions.
3)Real World Solutions. Mixing 2 cycle oil with gas is best.
4)Book How To Cool Your Wankel from Mazdatrix or direct from me.
5)$6,000 to $10,000 US.
Paul Lamar
Tony,
Just a gentle bit of advice, do not go anywhere near the Viking
engine. The engine is possibly OK, but the manufacturer and support if any
is definitely Suspect. I and 250 others had personal experience with the
previous Subaru engines. Again nothing wrong with Subaru, but plenty when I
PAID $25,000 for a firewall package that was never complete, I had to alter
things that many times that I spent another 4 years in altering the package
as the Manufacturer continually changed his mind as the clients did all the
R & D for him. Before I even flew the 1st package I was informed that the
PSRU he supplied was junk and he would graciously send me a new version for
$4.500 plus freight of course.
If you want verification, I can supply a
closed web site you can apply to join where what remains of the 250
"victims" are still trying to self help each other as Mr Eggenfellner
refuses to even talk to most of us let alone support what he sold. THe
only reason he is still breathing is that he is 12000 miles away, or he
would definitely have been "caressed" with a brick. The only ones who had
any support whatever were those who lived within driving distance. He is
still sitting on approx 10 deposits 0f $10,000 each for propellers that he
cannot supply. Refunds? what refunds?
If you think I am still upset, you should have met me 4 years ago. The
only thing that has helped heal the wound are people like Paul who are
genuine helpers and actually know what they are talking about.
Neil Unger.
Dear Paul,
The info below is only useful to anyone North of the border, you might
not have to bother to send it to everyone.
I found a site Atkins Rotary , they are showing a turn key single
rotor for $8500. But they listed the output at 7000 RPM at only 96 HP??
I read somewhere a single rotor standard port would easily give 130
HP.(my target HP) I don't even have to put up with the temperamental "P"
port. Why they only got 96 HP??
I am working with an all up weight limit
of 280 lbs. Someone in the recent past told me a 2 rotors would bust
that limit easily.I also have to add the redrive and radiator's weight
as well. I also heard the 13b single rotor engine is hard to come by in
Canada.I will eventually have to get a US mail box. I tried getting the
Aviator's Guide to Maz. Rot. from Rot Av, and a DVD, what an insult, the
int'l shipping for *each* is $36 while the DVD is $26 and the Book is
$35.They even said that is the best they can do.
The US shipping is $6.
Both item they could have it in an envelope and give to the post office.
Another thing we discovered in Canada, the parts shipped by Rot Av is a
prime example, if they go by UPS, they have their own brokerage in
Canada, something come in listed as aircraft parts, they tend to put
some crazy high value on it, a real shock. Amazon US wanted $44 for a
USED copy!! I have some 4 lettered words for them.
I recently needed an inside door handle for my Suzuki Sidekick, I found
one for $2.50 somewhere in Calif.I almost went for it until I found out,
after the brokerage fees and duties, the result is close to $40 !! I
must get my own US mail box. Now you see why I try to get Canadian
sources if I can.
I am fairly satisfied with an engine using mogas, and I am aware it is
not practical to get the 22:1 compression ratio from the rotary for it
to self ignite. I still have 2 spark plugs, so if I get the diesel/jet A
to say 12:1, it will burn with the help of a spark, especially if some
gas is in the mixture to help. To be able to use more than one fuel is
always handy, assuming not much extra engine complexities.
Tony Lam
---------------------------------------------------------------
The p-port is not "temperamental". In fact a RX8 type side exuast p-port
intack engine is no more "temperamental" than a stock 13B which has a side intake
port and p-port exhaust. The reason a p-port intake works better than side intake
port is the pressure difference across the intake port is lower than that across the
exhaust port.
The reason the Atkins one rotor is only 95 HP at 7000 RPM is precisely because it is
not a P-port intake.
It is possible to get about 250 HP with 2 rotor at 7500 RPM with a bridge port but
the porting cost is expensive as is the more complicated long intake manifold. It is
much better to p-port it and be done with the hassle.
Did you read http://www.rotaryeng.net/fund-of-intake.html as I suggested above?
The reason I did not suggest a 2 rotor for Zenith 750 above is for the FWF weight
reason on the 750. A single rotor also cost more money than a two rotor.
BTW do not change the subject heading if your are talking about the same subject.
Add the new comments to the end of the thread.
You are not likely to "get the diesel/jet A to say 12:1". Filling the recess in the
rotor to increase the CR will likely extinguish the flame.
You are also unlikely to get it run without high pressure direct injection.
http://www.rotaryeng.net/interesting.html
I suggest you down load:
https://docs.google.com/file/d/0Bzy-cXUDftdrMTFlMDQ5MWItZTc3ZC00YjkxLTg5ODMtMjUyZDcyNWJhOWVm/edit?hl=en_US&pli=1
or http://tinyurl.com/brvpbv6
Or http://foxed.ca/REbyKenichiYamamoto-1981.pdf
Or http://foxed.ca/index.php?page=rx7manual
and read them.
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.