I am going to fit a cannister muffler into a Edge 540, mine is distributed by Top Gun, but it is the same as the Hanger 9 Edge 540 that they no longer sell, the Edge is not designed for a cannister so lots of cutting and mods will be needed, the MTW 75 cannister will arives sometime this week and I will detail the mods on here.

Meanwhile I have modded the Edge somewhat by installing the rudder servo at the rear still with a pull pull cable system, if you are interested this mod can be found on http://www.rcuniverse.com/forum/m_4629728/tm.htm on this forum.

Mike

The canister is on it's way.
I have enjoyed reading your article. Keep the pics coming!

Pe

Thanks for the info re cannister delivery can't wait to get started, will post pics as soon as the bits arrive.

Mike

Pe

Recived all the bits today thank you, will start the installation immediatly and post pics as soon as my PC desides to play ball.[:@]

Mike

First pics of cannister installation:

first pic shows the manifold placed in postition to determine length required.

second pic shows the manifold and cannister placed in approximate positon.

third pic shows the original very noisy Bison muffler

forth pic shows the new UC place in postion. This pic shows the original structure of the plane all the original formers and tank floor, this all will be modified to accomadat the new UC and muffler system.

Mike

Two more views of the installation progressing, just need to deceid if moving the engine forward will make the instalation easier as it could bring the exhaust outlet in front of the UC, at the moment the problem is the position of the bend on the manifold being too close to F2 which is the front of the UC mount, any comments?

Mike

Just started to enlarge the hole through F3 for air flow and I suddenly thought the shape reminds me of something, but I can not think what it is.

Mike

my larger H9 EDGE- is just now getting a full pipe installation - I moved the engine forward -to clean up prop cowl interaction but the setup also allows 1" more space up front -behind the engine and shifts c/g forward a bit -the spacer is balsa block sandwiched between ply plates and screwed n glued to the cowl
The look is scale like as more new full scale performance craft have extended spinners .
The header is a stock aluminum one - but the KS ones really fitin closer - I have used many of them
the cowl originally was reworked for a Supersonic in cowl (excellent power but a weeeeeee bit loud)
Once I have the installation all boxed up- I will replace with my other new cowl
The performance with the Supersonic was not a problem the plane is a VTO setup 21.75 lbs and propped for 8400 in level flite.

More pics, I decided to reinforce the UC mount, I used a similar system too the QQ Yak in that some of the force from a landing would be transfered into the side cheeks of the aircraft by aluminium angle bolted into the side members and attached too the UC mounting bolts pic shows, other pic shows the former No 3 finally in position will possibly complete today, will post more pics as I progress later.

MIke

Further pic showing the cannister box, I decided to enclose this area to help prevent any excess heat traveling back along the fus, this area will remain open to allow heat to vent too the atmosphere, also shows the UC mount now finnished, all will be fuel proofed and painted prior to re-covering the bottom of the fus.

Mike

Two more pics showing the painted and covered sides of the completed installation prior to the bottom covering being replaced in yellow. Sound test will be carried out next week now as its good weather and I am going flying.

Mike

Completed the installation of the cannister, what I can't belive is the 1050rpm increase between the two silencers, the cannister is a much more muted sound with a much cleaner pick up from low revs this is a revelation. See movie.Click here to watch MVVS-45-Mag-with-Pitts-and-Cannister
The installation was definatly worthwhile if only for the increase in performance that an extra 1000rpm will give, that has made up my mind no aircraft without the provision for a cannister is worth considering now that I have first hand conformaion of the benifits.

Mike

EDIT: final details are:
MVVS 45 Magnezium,
TD75 Cannister,
22x10 prop turning at 6150rpm, only turned at 5100 with the in cowl pitts.
still running in on 40:1 oil should inprove even more with reduced oil content.

Welcome to the real world of power on two strokes.
On the EDGE I showed in post 7, I added a full pipe -mainly to reduce noise tho it was a given ,torque would go way up . The plane went up a full pound plus - now at 23+ lbs but power is realy spiffy- running 27x10 at 6500 static
The boys said - it's a friggen rocket .

Dick

The weight of the Edge went up by 0.6Kg thats 1.3Lb but that did include two new bulkheads and extra reinforcement for the new Carbon UC, which is much wider that the standard ali one, I am hoping to fly the Edge tomorrow, should be fun with the extra power available.

Mike

Wrong info given in the last post its on 30:1 oil not as stated above sorry for the misinformaion.

Mike

Good info Mike.
Keep it coming.

Thanks uclid, its nice when you get a positive responce, I still have some running in to do before I can reduce the oil content, when I do I will report any improvements, I also have a couple of carbon props to try and will report any increase in revs using these, one is the same as the wooden one I am using at the moment i.e. 22x10 I also have a 21x10 I don't know if this will be a great imporvement only time will tell.

Mike

I'm thinking of this engine on the WH Yak. There is no provision in the yak for the cannister, but after hearing the sound yours makes on the cannister, I may make some mods to the WH.
I currently have the MVVS26 flying a Taylorcraft, fitted with the BCM Pitts muffler. Whilst its not too bad in terms of noise, the power is being restricted. Luckily, the Taylorcraft doesnt need all the power the engine can give, but this would not be the case with the Yak.

Mike.

euclid/Mike

I am very supprised at the amount of difference the cannister made, so much more power and the throttle responce is transformed, also you will hear of people complaining about burrbaling at part throttle, this does not happen with this set up.

The MVVS 45 Mag is slightly lighter than the equivilant's out there but it is more powerfull, it would be a good choise for the Yak, I have the 58 Pro in my QQ 85" Yak, off at the moment as I have to modify the front for a cannister now.

Mike

thanks Mike. The 45MG is winging its way to me from my local hobby store. Regardless of the plane, it seems a versatile enough engine to find its way into anything. I particularly liked the sound of the cannister, so I'm thinking the plane must be able to handle this mod with ease! (I'm no builder, even assembling the wings at the field is an acheivement as far as I'm concerned!!!).
In Australia, there is 7kg weight restiction. Anything above that needs a certificate of airworthiness. No big deal really, but enough to make a concerted effort to keep below the limit. Maybe the QQ Yak if the WH is to problematic for the cannister.

Thanks for the info on the thread.
Mike.

Euclid

Make sure the MVVS 45 you get is the magnezium case one, this is the only one they make now and is the most up to date, you can recognise it by the slightly gold colour of the crankcase and of course its weight.

The QQ 85" Yak does not have provision for the cannister, but the new 86" Yak that will be comming out in the new year will, if you need something sooner the Hanger 9 Extra 260 has provision for the cannister and has had some very good reports, I am thinking of this one myself.

We also have a 7Kg limit in the UK too fly anything over that limit needs a certificate of competence from the Large Model Association, or a British Model Flying Association B Certificate, which involves a flying test and safety questions, this applies too over 7Kg and up too 20Kg, over 20Kg needs Civil Aviation Authority permission etc:

Mike

Had four flights with this bird this week end, what a difference the extra power has made I now have unlimmited vertical I mean out of range vertical, the muted sound of the engine at height and the fact that most of the time I am now flying around at part throttle due to the extra power has made a marked impovement to the environmental impact this plane has, no noisier that any glow and certainly much more acceptable than the diesels that some of my palys insist on flying (demented wasps) the combination of the MVVS and the MTW cannister is obviously one that has had a lot of R&D carried out on it, my manifold length at 280mm is obviously on the money and I am not inclined to start playing around with it, throttle responce is the best I have ever encountered on any engine, its immediate, bodes well for its future 3D capabilities.

Please post if you need any more details. I am just about to put a MTW cannister in my QQ Yak if anyone is interested?

Mike

As a bit of friendly advice do not cut back on the oil- the engine runs best at about 30% -40% less oil will just promote wear and gain NO power .

Dick

Thanks for that, I am running at 30:1 at the moment whilst running in, MVVS spec says after using all the oil that they supply with the engine, go to 40:1 but no lower, its advice I will be following, I have found with some other 2 stroke petrol engines that going to 50:1 or even 60:1 as some manufactureres recommend does not inprove anything except less smoke, incidently the MVVS on 30:1 does not smoke unless opening up from low throttle and then only momenteraly,its obviousl burning most of the oil off so needs it.

Mike

The Canister seems to float backwards out of the teflon coupling after a number of flights, I have put a teflon tube over the outlet and zip tied this too the front bulkhead to try to prevent this from happening, will post results after I fly next.

Mike