do i need a different engine
 

im building a goldberg cub.my father asked me what i wanted for christmas so i said an engine for my build.god bless him but i said 4 stroke and he bought me an mds .58.problem is i cant find any parts to extend the muffler out of the bottom of the aircraft.please help

RE: do i need a different engine
 

I find that a 70ish 4-stroke is IDEAL for this plane (Note, this is one of the best planes EVER with the clipped wing modification)

I think you have 2 choices, Mount the engine inverted and let the muffler stick out the side, or see if wherever your dad bought the engine will let you trade it in on a 70 4-stroke

RE: do i need a different engine
 

Dubro makes some muffler extension material that you could use to extend your muffler out farther.

Here is a link to several alternatives

http://www2.towerhobbies.com/cgi-bin...=++&search3=Go

RE: do i need a different engine
 

If you can get rid of the MDS do it. Out of four of them I have had only one run correctly and even that one is very picky as to the tank location, it's the 68. I have had three of the 58s, still have one. Two of them broke the case and muffler and this one I have will only run on the bench, not in A plane.
The carbs are such A bad design that Horizon quit selling them. With A good carb they run great but they are more work then they are worth. A good four stroke is A better choice so ask Dad to take you down and return it while you can.
You can contact Horizon and they can fill you in on all the problems they had, they aren't shy about telling you.

RE: do i need a different engine
 

Typically, a sidemounted engine can use what we call a "pitt's style" muffler when you need to get the exhaust down and out, and where there could be interferance such as a firewall. They are the cleanest set-up to use, and I'm sure alot of Cubs are using them. Now...... that said.... I don't know how available one would be for the MDS, or if you want to keep your MDS...

I'm in agreement with above posts, MDS is one of the tougher engines on the market to get to run correctly/consistently... one of my flying bros(very close friend) took 2 of them back to the LHS due to probs..... If anything.. go with a TowerHobbies brand engine... they run very decent for the money.... a four-stroke is very good for that Cub too, but you can figure about double on the cost of reasonable 4-stroke vs. reasonable 2-stroke. Example... a good Magnum 2stroke .46 is about $80(HobbyPeople) and a Magnum.61 4stroke is about $140-150.

RE: do i need a different engine
 

MDS does not have the nicknames "Metal Door Stop" and "Many Dead Sticks" and "Mostly Don't Start" for nothing.

That said (you have my condolences if you decide to keep the engine), measure the distance between the exhaust/muffler bolt holes and check the other makes (OS, etc) to see which ones have the same distance. The OS is PROBABLY going to be your best bet as the majority of these engines are "supposed" to be OS clones.

RE: do i need a different engine
 

Dido on the MDS problems. Had a MDS 58 a few years ago and could not get it to run right, Wound up selling it on Ebay to someone who really wanted it despite my warnings that it wouldn't run right.

Like others have said, go with a 70 or similar 4 stroke. I had an OS 70 Surpass 4 stroke on a H9 80" cub and was a perfect match. Great running motor and you could slow it way down for that nice scale fly-by with the motor putting along.