Bunky.F.Knuckle
150cc
I said from the beginning, to myself, that I would post up a thread on the ZDZ 112 Champion. For those that don't know, or knew..... I won a FaceBook contest that ZDZ in the Czech Republic put on back in Feb. I finally received my 112 a few weeks ago, and after staring at it for a few days in awe, I decided that it was time to finally mount up this beast.
Start with a 108" EG Aircraft Extra 330SC. It began life with an EME 120 with WrongWay RC tuned pipes and DA 100 headers. The EME (which I bought brand new) had approx 10 gallons thru it, prior to me mounting it in the SC. It was previously mounted in my 108" Yak 55M. Should have never gotten rid of the Yak and the EME. But it is all hind sight. Then I mounted one of my trusty 3W 106's in the Extra. I began to have ignition troubles (at idle, runs on 1 cylinder) with the 106. It is ONLY 9 years old, and has way too many gallons of fuel burnt thru it. So, I pulled it, and installed my DA 120 (which was in my 108" Corvus) and had 8 dead stick landings. The 8th one resulted in a rekit of the Corvus. So, I mounted up the DA in the SC, trimmed my baffling, got it all nice and snug upto the juggies. Needless to say, I didn't trust the engine to continue to fly my style of flying. So, fortunately, a good friend of mine loaned me his DA 120. So, I've had it mounted in my airframe for about a month now, and I don't want to keep his engine any longer, so this is why I'm mounting the ZDZ in the SC now. Plus, I kinda like how the tuned pipes sound with this airframe. So, I'm mounting the tuned pipes back in this airframe and hooking them up to the ZDZ 112.
Preliminary mounting looks like the engine will fit in the previous mounting holes. Boy was I el-wrongo. 3W/DA/DLE/EME and so forth all share the 70x80mm (width/height) mounting platform. The ZDZ 112 does not. It is approx 60x85mm. So, I had to knock out my previous blind nuts in the firewall, dowel it and redrill for the ZDZ. I figured that I would try some 5mm or 10-32 screws for mounting this go around. I have 10-32 blind nuts and hopefully long enough stand offs and screws. Well, it seems that 2" screws aren't going to be long enough. But, 1.5" stand offs are going to be just right.
Well, instead of having to search for longer 10-32 screws, why not try mounting a 112cc engine like the 50/55c class engines are. A stand off that is threaded internally on both ends. I think this will work quite well, use a 1" long grade 9 10-32 cap screw from the inside of the firewall, thru the blind nut, inserted into the stand off. Then a 3/4" long grade 9 10-32 cap screw on the engine side mounted into the stand off. Lock washers and blue loctite are used without question. Then I will have to relocate my throttle servo, shorten up my fuel line, trim the firewall to fit the carb and then finally mount the arms sent with the engine to the carb for the choke and throttle butterflys. I was hoping that I could get this going for a possible Saturday test, but I have to work, and I would also like to work on my trailer, before it gets too stinking cold here in Ohio. But Sunday may work out best for me, providing I get it all done and ready to rock.
Pics coming. I am transferring pics from an 8GB card in my phone to a new 256GB card, all via my laptop.
@Flyrcjoe @Terryscustom
Start with a 108" EG Aircraft Extra 330SC. It began life with an EME 120 with WrongWay RC tuned pipes and DA 100 headers. The EME (which I bought brand new) had approx 10 gallons thru it, prior to me mounting it in the SC. It was previously mounted in my 108" Yak 55M. Should have never gotten rid of the Yak and the EME. But it is all hind sight. Then I mounted one of my trusty 3W 106's in the Extra. I began to have ignition troubles (at idle, runs on 1 cylinder) with the 106. It is ONLY 9 years old, and has way too many gallons of fuel burnt thru it. So, I pulled it, and installed my DA 120 (which was in my 108" Corvus) and had 8 dead stick landings. The 8th one resulted in a rekit of the Corvus. So, I mounted up the DA in the SC, trimmed my baffling, got it all nice and snug upto the juggies. Needless to say, I didn't trust the engine to continue to fly my style of flying. So, fortunately, a good friend of mine loaned me his DA 120. So, I've had it mounted in my airframe for about a month now, and I don't want to keep his engine any longer, so this is why I'm mounting the ZDZ in the SC now. Plus, I kinda like how the tuned pipes sound with this airframe. So, I'm mounting the tuned pipes back in this airframe and hooking them up to the ZDZ 112.
Preliminary mounting looks like the engine will fit in the previous mounting holes. Boy was I el-wrongo. 3W/DA/DLE/EME and so forth all share the 70x80mm (width/height) mounting platform. The ZDZ 112 does not. It is approx 60x85mm. So, I had to knock out my previous blind nuts in the firewall, dowel it and redrill for the ZDZ. I figured that I would try some 5mm or 10-32 screws for mounting this go around. I have 10-32 blind nuts and hopefully long enough stand offs and screws. Well, it seems that 2" screws aren't going to be long enough. But, 1.5" stand offs are going to be just right.
Well, instead of having to search for longer 10-32 screws, why not try mounting a 112cc engine like the 50/55c class engines are. A stand off that is threaded internally on both ends. I think this will work quite well, use a 1" long grade 9 10-32 cap screw from the inside of the firewall, thru the blind nut, inserted into the stand off. Then a 3/4" long grade 9 10-32 cap screw on the engine side mounted into the stand off. Lock washers and blue loctite are used without question. Then I will have to relocate my throttle servo, shorten up my fuel line, trim the firewall to fit the carb and then finally mount the arms sent with the engine to the carb for the choke and throttle butterflys. I was hoping that I could get this going for a possible Saturday test, but I have to work, and I would also like to work on my trailer, before it gets too stinking cold here in Ohio. But Sunday may work out best for me, providing I get it all done and ready to rock.Pics coming. I am transferring pics from an 8GB card in my phone to a new 256GB card, all via my laptop.
@Flyrcjoe @Terryscustom
