Aitch1969

my original post was a little abrasive but reading their text they say

"MISTRAL Engines, LLC offers a family of liquid-cooled rotary-piston engines for light aircraft. The powerplants

are based on an automotive engine core, with a planetary reduction gear and a fully redundant Digital Engine

Management (DEM) system designed to meet certification

standards."

is this automotive core the 13b? all the specs on the web site match this assumption also see the engine core picture attachement

I am in full agreement "I will always root for any business that's providing alternate engine choices."

If this as i suspect a masda core then servicing may not be a problem if used as a non certified unit

The point I am failing to get accross is that we should all be further encouraged to use the mazda engine although we can only dream of acheiving such a beautiful result a little time and effort and the same operational results can be had for a fraction of the cost even when using all new components.

This should also go towards quietening the voices of those who put down the auto conversions

engine core.bmp

mistral engine.bmp

ok i am new to this forum have read ALOT and commented on a few points.

Who am I, Where am I, What am I doing?

Hedley Pepper

35 Years Old

Nottingham

England

Have been building, Designing and flying model aircraft since 1975

have been learning to fly as finances allow since 1990

Have been looking into home building since 1994

after much research in 1994 i fell in love with the cozy this has not changed, it is difficult in the UK to do anything out of the norm and back in 94 they (PFA) would not allow me to build a MKIV this is now allowed but only as a two place aircraft at 2000lb max weight (they say the back seat is not reinforced enough (ANY COMMENTS ON THIS) and 200hp max (up to 250 if i can convince PFA airframe will take it) if I want to use infinity retracts i will ave to provide structural analasis (proof) that the spar is sufficiently reinforced

COSTS lets be real here for the amount of hours i will fly the most cost effective route is to hire a plane as needed that way all the costs are spread.

but having decided i want to build because i want build not because i want to fly. then the cost of the build and subsequently operation are my concern.

ENGINE i looked at the delta hawk some years ago and my fuel cost comparison for operation in europe is still quoted on their web site it looks like these engines are finally about to be available and without doubt any I/C engine running on jet A will pay for itself in no time and more than make up for the high maintenance costs of a certified engine

Petrol (gas) in the uk is close to $8 gallon compare this to jet a fuel and factor in improved (reduced) fuel flow at a given power setting

All of this said i dont have $30000 in one go so i am looking seriously at the 13b turbo or renesis n/a but the thought of fuel cost at around $80 per hour of flight is kiling me, a price i will pay if i have to i dont want a kri kri

in all i intend to build airframe almost entirely to plans put as much time as necessary (and cash) into engine and avionics i want some kind of glass cockpit this doesnt have tobe expensive http://www.maddyhome.com/canardpages/pages/alwick/glass.html

as for retracts the jury is out but i kinda think i will go fixed per plans

WHEN WILL I BEGIN i am now in a financial position that will support this project but have nowhere to build untill I move house, i do have a friend with space to build a workshop on his land but i will have to work on that one and see how mch rent he'd want, another option s to build a single garage at present location and get started

HELP anyone in the uk know of supplier for the glass resin etc can only imagine shipping costs from us.

Ok now i feel stupid, ive found the web site.

Its not a cozy its Tracey Cook at rotary aviation see the link below

http://www.rotaryaviation.com./renesis_engine.htm

there is a good write up here more to do with the renesis than the ram air but think it would help you.

for us pusher guy,s an armpit scoop may be the way to go!?

I wish i could remember where i saw it done, it was on a renesis engine that had apeard underpowered probbly in part due to being a new "tight" engine the ram air scoop was about 20" long and a full 180 degree bend.

a noteable increase in power was noted even at take off speeds.

its also true that the previous induction route had been inefficient probably adding to the difference noted.

I wll think and look hard to try and find the link for you.

isn't e-bay wonerfull 3 days to go and already $425 +$25 to register with AS&S plus postage on 10-151b packge !!!

just found this link in the honda section and thought it should be posted here

http://www.mistral-engines.com/ (non-Mazda rotary?)

what are your opinions

1. validity of the non MAZDA claim

2. Pricing

3. 3000 hour TBO

is the mistral really an "NON MAZDA" rotary or really just well developed package around this now familiar engine? and at over $30,000 its definately TOO expensive

I think the point of te question here hs been lost.

To help promote air density to the engine could one make the air scoop bigger?

this is being asked in relation to engine performance not cooling therefore cowl exhaust is not relevant. "although if induction air is being taken from within the cowl a SMALL pressure increase may occur with a larger inlet and smaller exhaust from the cowl but mainly you'll just get buckets of extra drag"

what you are wanting is "RAM AIR " induction or "POOR MANS TURBO " i have loked at length and did find a website for 13b powered aircraft using one although i can't find it again now!

Im sure someone will correct me if im wrong but in essence a forward pointng scoop or vent colects air travelling towards it at the velocity the aircraft is travelling, this has to slow down as it has nowhere to go "untill the engine swallows it" thus it mus be compressed giving higher manifold pressures. I think a fairly long induction duct is required so that the pressure does't just back up and cause air to flow around the inlet causing unecessary drag!?

Ok ive been here a while and have spent many many hours reading id like for those of you with far more knowledge and experience to look at the following link and gve your opinions

http://www.smartplugs.com/engines/rotary/singlerotary.htm

im either going to start something or look very stupid