Originally posted by RS2K
I've been thinking about a few things. What does a ZDZ 40 weigh? I highly dought I'd stick a 40cc engine on that plan, but it's fun to think about! How is the ignition on the MVVS VS the RCS? I think I'm just going to go with an inverted pitts muffler and use some kind of cowl. I really like Wonderufwade's toilet bowl scrubber cowl idea and might put that to use. As far as the engines go, do you think I'd have trouble putting an 8 ounce tank on the CG and also using a 2 ounce header tank? I like the idea of a header tank because I can completely drain the main tank without getting air to the engine.
Let's see.
I do have a pair of ZDZ 40s, and also weighed them this morning.
(Right now I'm assembling a GP Giles. I have an OS 1.60 on hand for it, but was contemplating installing one of my (spare) 40cc gassers. After crunching the numbers I've decided to stick with the glow engine, as the Giles doesn't like to carry a lot of extra weight.
Anyway. Here's the info.
ZDZ 40 RV:
- engine : 1304g
- six-bolt prop adapter : 42g
- ignition (Falkon) : 132g
- J&A pitts muffler (inverted) : 214g
- Diablotin muffler & fles header : 262g
Engine, ignition & pitts muffler == 59.68 oz. That's a lot of weight for this size o' plane.
I was thinking that I'd be able to easily fit the MVVS & Bisson inverted pitts muffler, but I don't remember ever actually measuring this combo against the plans. Gotta check that.
I also think that a nice fiberglass cowl would be a cool way to go. Perhaps something off of a Cap - that way you'c be able to mount the engine sideways and still have it look good
RCS vs. MVVS. Both engines come with electronic auto-advance type ignition systems. I've used 700 mAh nicad packs on both engines, with good results. Hand-starting is easy in both cases.
One note. The RCS uses odd metric spark plugs and are not cheap to replace; the MVVS uses a standard weedie-type plug which is easily available.
Header & main tanks. The carbs on these gas engines are pumped - just put the fuel tank on the CG; he engine will handle the rest. Takes a little longer to prime, but that's all.