By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by CML

Where can I get a Merco 61 mk 11 Silencer?

All Topics | Latest Posts

Search for:  in Thread Title in  
Eddie Clanzy-Hodge28/10/2017 14:36:27
11 forum posts

Just joined UKCAA and I am contemplating building a model that I flew in the early 1970's. A Moonglow VI with the Merco 61.

I still have the Merco and I have just taken it apart and cleaned it all up. The original black dust-bin silencer bit the dust when I crashed the Moonglow.

The only think stopping me now is a silencer. Does anyone know where I can get one?

Thanks in advance

Eddie Clanzy-Hodge

Percy Verance28/10/2017 17:20:06
avatar
7099 forum posts
142 photos

Well I have one of the said dustbin silencers Eddie, but it's currently fastened to my Merco .61!

Mine also has the ED big bore carb too, and goes well - or at least did the last time I flew it.

I always thought the Moonglow was a bit earlier than the 70's Eddie? I think Mike Birch was on the Capricorn by then, but I've been wrong before.......

Edited By Percy Verance on 28/10/2017 17:22:16

Martin Dance 128/10/2017 17:46:19
170 forum posts
33 photos

I know it's an obvious thing to say but keep an eye on ebay, one came up recently. ATM there is a nice looking example of a Mk4 61 complete with said dustbin silencer £16 at the moment.

Peter Christy28/10/2017 17:54:50
1124 forum posts

I recently bought a BCM silencer from Just Engines for my Super-Tigre 45, the originals no longer being available. Although specified for a 20-50 size engine, I also trial fitted it on an HB61, and it was perfect!

A modern .45 is around the same power output as an older cross-flow 61, like a Merco, Webra, HB, etc, so it should be fine.

Its a little bit pricey, but very well made, pretty quiet, and doesn't seem to restrict the engine significantly.

Here:

**LINK**

at the bottom of the page.

Thoroughly recommended!

--

Pete

Eddie Clanzy-Hodge28/10/2017 18:14:46
11 forum posts

Thanks for the prompt replies.

I will look at the BCM silencer from Just Engines. I know that I could put another engine in the plane but this is all about nostalgia and I want to recreate my old Moonglow with my original engine as much as I can.

It may well have been pre 1970. I do remember that another member of the Leighton Buzzard club built a Superstar at about the same time and I don't think the Capricorn had come out then. It was all a very long time ago! However it could have been around 1969-1970. I got the brand new Merco mk II from Harry Brooks at a "special" price and that prompted me to build the Moonglow!

The other possibility is that I use the Merco in Harry Brooks' REB. Has anyone tried building one of those yet?

Percy Verance28/10/2017 18:35:10
avatar
7099 forum posts
142 photos

Hi again Eddie

The Capricorn first appeared around 1973 I think Eddie........

Never had a Capricorn, but I did have the Mick Reeves International kit, which was a slightly larger version.

I also had a Kwik Fly back in the late 70's/early 80's. Great flyer.

 

Edited By Percy Verance on 28/10/2017 18:38:23

Peter Christy28/10/2017 18:41:32
1124 forum posts

I know what you mean! I'm currently flying a KingPin with a Webra 61 that I bought back around 1967! I remember being told when I bought it that I was mad! It was £15 new, and a Merco was only £12. But my reason for buying is was that I had previously had a 2nd hand Merco 49, and had no end of problems with it! It would run fine on the ground, and you could tip the model inany attitude you liked, and it would keep going - but as soon as you got daylight under the wheels, it would lose power to the extent the model wouldn't clear the hedge at the end of the strip!

I'm not saying all Mercos were like that, but this one was, and even our club expert couldn't sort it!

Here we are 50 years later, and the Webra is pulling like a train!

--
Pete
Percy Verance28/10/2017 19:34:40
avatar
7099 forum posts
142 photos

How odd Peter

I have a Merco .49 too, and it has to be one of the nicest engines I've ever had, with one of the sweetest/slowest tickovers of any engine I own. I flew it back in the mid 80's a lot on the front of a Telemaster 70. A nicer engine than the .61 in my opinion.

Good engines Webras. I bought a .61 Champion with the Dynamix carb when they first appeared. Wow.........

Tom Sharp 228/10/2017 21:12:49
avatar
3248 forum posts
17 photos
Posted by Percy Verance on 28/10/2017 18:35:10:

Hi again Eddie

The Capricorn first appeared around 1973 I think Eddie........

Never had a Capricorn, but I did have the Mick Reeves International kit, which was a slightly larger version.

I also had a Kwik Fly back in the late 70's/early 80's. Great flyer.

Edited By Percy Verance on 28/10/2017 18:38:23

I've still got my Mick Reeves International up the loft, but the veneer has lifted on the wings and stretched the covering, looks a right mess.

Eddie Clanzy-Hodge28/10/2017 21:44:15
11 forum posts

Hi All,

Thanks for all your comments.

I now think my winter projects will be

1. Electric Moonglow. I was given a purple power motor that probably has similar output to the Merco 61. This will be my main pattern ship for next year.

2. Merco 61 powered Harry Brooks REB. It seems sacrilege to put electric in Harry's model. I know that he used a Merco 49 at first and then a McCoy 60 for the World Camps but a Merco 61 is in keeping with the era.

How do I know. Well I built the REB fuselage for Harry when I was a teenager doing C/L with the Worthing Bald Eagles Club. One day he came to me with a very urgent request. Would I repair the fuselage fairly quickly because he had pranged it in a frequency mix-up at the field near Shoreham. I did this and gave it back to him. Little did I know at the time that he was in the UK team for the world champs at Kenley and this was his No 1 model! He never ever said anything about that. It was only later when we went to Kenley and I realised he was flying the model that I had repaired. I never really appreciated what was going on at the time and certainly not the importance of the result.

So, I have a soft spot for the REB and feel it is worth resurrecting with the Merco in Harry's memory.

Also, since I have recently restarted flying, I am currently using my old Hanno powered bitsa based on LA-1 wing + either a Summit-3 or LA-1 stab (cannot remember which) and O/D fuselage based on LA-1. The LA-1 bit the dust!

I had forgotten what it was like to fly a 1990's pattern ship. Performance is awesome when you are 73 years old!

Percy Verance29/10/2017 09:20:37
avatar
7099 forum posts
142 photos

Hi again Eddie

Exactly which Purple Power motor do you have? If it's the one I think, it'll be quite a bit more gutsy than the Merco.

John Emms 129/10/2017 10:15:36
229 forum posts

I ran one of my Mercos with the very effective P&R muffler, BUT vibration wore away some of the exhaust stub. If there is an aftermarket silencer that screws on, great, but I would be looking out for the black "Peakpower muffler" coming up in lots on E-Bay, or at swapmeets.

On the running issue: as supplied, air bleeds down the needle valve screw thread leading to unreliable throttling. The needle valve is totally sealed by cutting a short piece of fuel tubing (about 3mm), and sliding it over the thread of the needle valve.

Eddie Clanzy-Hodge29/10/2017 10:42:36
11 forum posts

For Percy

It is an old Purple power 4260-600 that I was given by a club member. Supposed to develop somewhere around 750-900 w. If the Merco developed somewhere around .9 bhp then the 750 w should work. It looks as if I will need 5S and I can prop it for more duration / less power.

Well that is my theory.

I could be wrong since my only electric experience so far is a WOT 4 Foam-e that I bought to get back into flying before trying the old pattern ship.

Peter Christy29/10/2017 10:48:25
1124 forum posts

One tip for fitting silencers so they don't come loose: 5-minute epoxy!

Don't use gaskets, simply de-grease the mating halves with cellulose thinners, add a smear of 5 minute epoxy all around the mating surfaces, and do up good and tight! You will have a joint that won't leak or come loose, yet if you need to remove it anytime, all it needs is a sharp tap from a suitable implement - once you've removed the fixings of course!

That's how the silencer on the Webra is fixed on that video above, and there hasn't been any sign of leaks or loosening for two years now!

Percy: Yes, I know Mercos had a good reputation - I had a Merco 35 and it was dead reliable. I don't know what the previous owner had done to that 49, but we never did get it to run properly. Swapped it out and replaced it with the Webra, and all the problems went away, so it wasn't plumbing or fuel of such like!

--

Pete

Percy Verance29/10/2017 10:53:30
avatar
7099 forum posts
142 photos

Hi again Eddie

I'm not over-burdened with electric flight experience Eddie, but that motor might be a tad on the small side. I have a Purple Power 5055 - 580 (1280watt) here, and that was recommened to me by George at 4Max/Purple Power to fly a 60 inch low wing job weighing 6.5 pounds using 4 cells and a 14x7 prop, which it does nicely. I may of course be wrong (it's happened before!) but I'd have thought you'd need at least this size of motor, although you'd be dropping the prop size a bit if you're going with 5 or 6 cells.

 

 

Edited By Percy Verance on 29/10/2017 11:01:46

Percy Verance29/10/2017 11:00:13
avatar
7099 forum posts
142 photos

Peter, I think I'd look at the crankshaft. It may be bent.......

Again, it's odd you mentioned your 35. I had one and couldn't get it to behave at all. Mind you, I think that stupid plastic carb might just have been the cause of the problems.....

Peter Christy29/10/2017 11:21:57
1124 forum posts
Posted by Percy Verance on 29/10/2017 11:00:13:

Peter, I think I'd look at the crankshaft. It may be bent.......

Again, it's odd you mentioned your 35. I had one and couldn't get it to behave at all. Mind you, I think that stupid plastic carb might just have been the cause of the problems.....

Bit late, now Percy! We're talking about something that happened 50 years ago! wink

My Merco 35 was an early one with the metal carb. Dead easy to set up, and never had any issues with it. Sold it along with a model to a clubmate some years ago now....

--

Pete

Percy Verance29/10/2017 11:30:29
avatar
7099 forum posts
142 photos

I just thought you may still have your Merco Peter. I've still got my .49 and .61...........

John Emms 129/10/2017 11:35:09
229 forum posts

For an electric equivalent of the Merco 61, you are looking in the 5S area, though the now popular 6S power systems could be underpropped to bring them "into line", and the late 60s, early 70s aerobatic models that we are looking at for the Merco 61, use what we would now consider to be very small props.

Many still don't appear to realise that what many motors now "say on the tin" isn't the power you are reasonably putting into the motor - so a "750W motor" might only be used sensibly in the 450 to 500W region. Use test data to decide what works with the prop sizes that need to be used.

Percy Verance29/10/2017 13:11:22
avatar
7099 forum posts
142 photos

Those were pretty much my thoughts too John, although as I said earlier my electric experience isn't vast.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of RCM&E? Use our magazine locator link to find your nearest stockist!

Find RCM&E! 

Latest Forum Posts
Support Our Partners
Expo Tools 14 July
CML
Overlander
Gliders Distribution
electricwingman 2017
Motion RC
Slec
Wings & Wheels 2018
Airtek Hobbies
Advertise With Us
Sarik
Latest "For Sale" Ads
Which part of building a new traditional balsa aeroplane do you enjoy the most?
Q: Which part of building a new traditional balsa aeroplane do you enjoy the most?

 Research & choosing the model
 Building the fuselage
 Installing the engine and radio systems
 Building the flying surfaces
 Covering/painting/finishing
 All of it!
 None of it. I'd rather someone else did it!
 Other

Latest Reviews
Digital Back Issues

RCM&E Digital Back Issues

Contact us

Contact us