14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

I picked this up from e-bay not knowing if it even ran but the seller said it had compression so what the heck,take a chance,take my turn.anyway,Its spinning a 15x8 prop at 7900,APC.Ill try a little bigger.Weight with ign,prop,mufflers,RTR without battery is 5.5 lbs.[:o]But,on the tag it says serial no.1,and it does run.:)Length from back of mount to back of prop,5-3/4 inches.The front case and rear case are stock echos with a homemade block in the middle.Ive also included a pic next to a satellite remote for size comparrison and a better pic of engine.This is my first attempt at a video with my wifes sony digicam.[ive never used it].Im still trying to upload the pic.


http://s110.photobucket.com/albums/n...=echotwinC.flv

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Well heres the pic of the engine with the remote.I tried to put it in the first post but i quess you cant have to many items in a post?The center piece of the engine is just a square block of aluminum as a spacer.The intake manifold is made out of copper fittings for water pipe,the round parts for carb and engine for intake are made of aluminum and there all jb welded or sweated.I put a new carb on it,11.11 venturi,number 28 in throat.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Well Buck you have my full attention

Some good close ups will really be sweet.

One more thing ... Please Hurry. [)]

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

I knew you would be the first to post since i saw your id in the users veiwing this thread.Heres some more pics.Ill have to amke a change to the mufflers as these are the ones that have staggered bolts.So right now one exhaust is facing rear and ones facing front.Im going to gut,then install copper pipe brazed at the rear with a 90 degree turn down spout.I have a friend[lives in oregon]sending me some more echos.Im going to see if the 16cc or 22cc pistons and cylinders will swap.Even though its a twin,14cc echos are not powerhouses.Even timesed 2.
Come on av8tor,captjohn,tim,ect...i know you guys cant pass this up.Oh yeah,i put in a new set of franks rings also so maybe it will help after they seat.I only have about 10oz of fuel through it so far.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

I'm really interested in this project because I have several 40cc Echo blowers that I would like to make a twin out of.

I'm working on a new, to me, project and it is begging for a nice smooth running twin.
http://www.rcuniverse.com/forum/m_7380472/tm.htm

It is set up for a G-62 but a smooth running twin would just be so much better.

Any way the 40cc Echo blower is a 3 ring engine and as a twin would be perfect for this project.
Top speed is not important swinging a large prop around 6000 is.

Any way check out the link and let me know what you think.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Now thats a really nice looking one of a kind kinda plane.Ive never seen one.Well the biggest reason i bought this little twin was not because i have a plane for it{wich i dont].Is because i wanted somthing to copy.Ive kinda figured that somwhere there was or a way to make a simple twin.Now this has one part that is a little difficult because of machining.I have my small lathe and a drill press.I have another project im working on,thats to copy this but using a simplier case.I will be welding the crank like the BME thread.I bought 3 more 14cc to try this very cheap so if i screw somthing up i can at least sell one working 14cc echo with spare parts.The object here is going to be to make a twin with nothing but a drill press,some minor welding,hole saw,simple tap and die.Just basic shop kinda tools.So far i have the crank done except for welding,now i need to find me some 2-1/4 aluminum square stock.Is this the pic of your 40cc.The brochure says for the biggest prop,22x10 @6000 RPMS with a top flite or zinger prop.Must be the 3 rings for the great compression.The highest RPM says 20x6@8050 RPMS.Horspower=3.2@8000.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

That's a cute little twin Buck. Good luck with your project!

AV8TOR

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Thanks av8tor.This is how long it took me to get this running since i talked to ya last.I have 4 echos coming from Bob in Oregon.2-22cc and i belive 2-16cc.im going to see if any of the pistons and cylinders will exchange.Boost up the HP but not the weight so much.If my personell twin copy works out who knows whats next:D.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Than't the one.
Although I've never seen one converted.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

who made the center section?

id like to know if there are drawings for it or something

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Its not visible maybe in the pics but the only info i have on it is this:
Grim Twim
Model 4
Ser No. 1
I emailed the person i bought it from about half dozen times and basiclly all i got it came from an estate sale,ect,hes from NC,east coast.I did a search on google and came up with every brothers grim,sisters grim,fairy tales,ect,no engine.Im building another twin following the desighn of this one but the midsection is going to be easier on mine.The other one will need a milling machine,lathe,ect and expensive tools.Im using my lathe for one piece of the operation on this one.The next one im going to use only a drill press and welder.But the welding could be farmed out to someone for a 12 pack.The rest would be basic hand tools and maybe a special drill bit.I have the crank ready to be welded,[ill use my stick welder].Im going to order the center aluminum stock this week.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

well i work in a machine shop so the machining part wouldnt be a problem for me.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Sent ya a PM.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Hey Buck
I took a poll and everyone thinks you should completely disassemble the engine.
Take hundreds of detailed pictures and post them for all to see. :D

Okay so I didn't take a poll, but it's still a good idea. [)]

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Yup,i was thinking about it but i would need to get all new gaskets or get some gasket material to make my own.The thin case gaskets would be more effort.I just took apart one of my echo 22cc on a hedge trimmer that needs a new front bearing so im going to see if the wrist pin,rod,cylinder bolts are the same and see if i can make it into a 44cc instead of a 28.If there the same great,if not ill look at a 16 or 18cc{if echo made one an 18]and see if there tha same.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

I believe they are larger.
But you can make bushings and make them work, Av8tor did.
The cylinders are suppose to bolt right on.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Well i went out and checked the 22cc from a hedge trimmer that needs a front bearing..The piston pin is the same size.The cylinder bolts are close enough that i might take a cylinder off the twin and try a 22cc cylinder to see if the bolts will fit.The only other difference is the 14cc just uses the wrist pin and the rod as a bushing,no needles.The 22 uses a needle bearing on the rod but the rod is bigger.So i wonder if the stock 14cc rod with no bearing is capable of handling a 22cc piston,and compression.Plus ill have to check the rim around the bottom of the cylinder,but my lathe can fix that if neccesary.Heres a pic of my crank im making for my own version of a 28cc twin.I will weld tommorow and post a pic.Its the same as the pics in the BME twin thread.All i did different was to trim off the excess couterbalance that wont be needed.Its also easier to weld.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Well i welded the crank today.As you can see in the pic i also cut off the counterbalances that wernt needed plus it was easier to weld.I also just kinda mocked it up on the scale to see about how much weight was totaling up.There are no pistons on the rods in the pic.The sweat tubing is what im going to use for the intake.Im going to order the G10 board for the intake adaptors and the aluminum square stock for the center piece this weekend.My scale is within 1 oz of the post office and the local meat market wich both have to calibrated by the AZ dept of weights and scales.So my scale is pretty close.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

You may concider enlarging the oil hole for the wrist pin and maybe even a 2nd hole.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

The top of the rod doesnt have any holes for oil at all.So your more than likely right and thats a good idea to at least put one.I ran the first one i bought today again to see if the compression was coming up any.I have about 6 oz through it now.Going to run it some more.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

If I'm right it goes on the side that the crank starts swinging up on compression.

That should be the left side facing the prop hub.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Sorry to pee on your barbeque but isn't having a common crancase on a two stroke a not so good idea? Also having a big lump of crank web unsupported by a bearing in the middle going to grenade your engine under sustained high RPM?

Rich

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Your right it could never work. [&o]

http://www.rcuvideos.com/item/80HMB3SYWNYB42GR

http://www.rcuniverse.com/forum/m_54..._1/key_/tm.htm

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

BME has been making there twins for years with nothing in the center,so has DA,3W,D&B machine,ect...my GT80 doesnt have anything but 2 case halves.Look at the BME thread here in the conversion forum where evryone was building there own and look at there cases and cranks.Im just duplicating whats already been done before.Also,where not supposed to run our engines at a sustained high rpm for a long time anyway.A person is supposed to put the right prop with the right pitch to keep the rpms around 6500-7000.Go to horizonhobby and put in GT80 in the search bar,then look at the parts and look at the case.Look at the BME cases on the thread here.I posted these pics i borrowed from the thread thanks to capt and tim.Hope this is ok to do.

RE: 14cc Echo-x-2==Echo 28cc Twin/pic/video!
 

Pass the popcorn...