bunsen

I just purchased a MVVS 91 glow engine and will be installing it in a ZLIN-526AS. It has a narrow cowl so rotated the exhaust to the rear.

From the various web sites I will start with a 15 x 7 APC prop running FAI fuel

Was wondering about an appropriate glow plug. From web posts seems like an OS A8 or a OS F.

Appreciate any recommendations.

Ray

Hobbsy

My Feedback: (102)

Ray, I had one of those for a few years and it ran perfectly on 5% fuel with 20% castor and a Fox Miracle plug. Actually, it equally well on 5% fuel with 20% 50/50 syn/castor blend.

earlwb

I always use a FOX glow plug myself. With a Schnuerle type engine you don't need a idle bar on the plug. So a Fox Long plug works just fine. A Fox Miracle plug might give you a little better performance too. Unless you are getting into racing or some high performance endeavor you won't need any of the more exotic glow plugs.

fiery

My Feedback: (2)

I have an MVVS .61. It has the same case as the .91.

It is fed nil nitro FAI fuel. A Nova-Rossi C5 or C6 plug, is what the makers recommend. This brand of plug can be hard to find in the US.

A decent "warm" plug works fine. The larger MVVS glow engines do not give their best when subjected to "hot" plugs. Fancy expensive four stroke plugs are not required.

I have used Fireball Yellows (medium heat range) and K&B 1L's with complete satisfaction.

Hobbsy

My Feedback: (102)

Derrick, glad you mentioned the yellow, I tried a yellow Taipan in my MVVS .61 on 5% WildCat fuel with 18% lube it is perfect. I doubt that Ray can get one of those though.

pe reivers

Novarossi C6 plug, which is a wee bit cold, but runs like a champ. Enya 4, or OS#8.

jaka

Hi!
For an ordinary sport plane an 15x7 propeller is a bit too large. Use a 14x6, 15x4 or 15x6 APC or RAM. Larger props work too ,for instance in my You-can-Do.60 where I use a MVVS 15cc engine (.91)running on 5% nitro and 15% all synthetic oil (Motul "micro") best prop is a 16x4W APC, but that is a lightly loaded ,slow flying 3D plane.
I use an Enya 3 plug, but there are several other plugs that works too like the standard mounted Nova-Rossi 6 and 5 plug or the OS 8.
If it's the new 15cc MVVS 5% nitro is preferred instead of 0% nitro ( FAI fuel) as the engine throttles better with a little nitro. But remember if it's the older variant with two piece head (aluminium coloured) then even 5% nitro can be too much.

bunsen

Thanks for all the responses.

I just received the engine Friday from pe reivers and have it mounted in the plane.  Rotating the exhaust to the rear was a snap.

I already use an OS A8 plug in a OS MAX 32 that I have so I will try that first and also a K&B 1L or a FOX miracle plug.  I would like to use FAI fuel so will start there.  The other planes I have use 15% Nitro or FAI fuel so I am trying to minimize the fuel types.

For the prop I have an APC 15 x 6 and a APC 15 x 7 that I will experiment with. 

Thank you very much for the quick and excellent feedback.

Next step is to install a muffler.

The assistance  is appreciated 

Ray

fiery

My Feedback: (2)

Have fun experimenting with props and plugs Ray.

I love my MVVS's.