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ORIGINAL: NM2K
The Enya 50 CX is a screamer that will swing larger lumber if the need be, but you will be wasting its power doing so. Unfortunately, Enya dropped the AAC piston/liner of previous (smaller) CX engines and reverted to the older ABC type of piston/liner setup. Still, it is a great engine and a winner in my eyes.
Ed Cregger

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ORIGINAL: Ram Jet

So you like airboats. Here's one for you. I have a new Enya 1.55 4C. How large a hull would I build to accomodate this baby? I'm serious. I bought the engine because I couldn't pass it up for the price and it's a beautiful engine and , of course, I love Enyas.

Cheers,
Bill

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ORIGINAL: earlwb

AAC is pretty good, but if you have a AAC engine overheat from a lean run too much, the aluminum cylinder sleeve won't shrink back and you lose the pinch at TDC. ABC on the other hand, the brass sleeve will still try to shrink back and you get the pinch back at TDC (at least most of the time). Aluminum has that characteristic of expansion when heated, but heated beyond a certain temperature, it tends to stay expanded more after cooling off. You sometimes see the effect when someone overheated a crankcase to replace the bearings and the discover the new bearings are a bit loose now.

Anyway that is probably why the discontinued the AAC piston and liners. Also ABC cylinder/pistons seem to produce a bit more power than the AAC ones do in some engine designs. Interesting paradox.

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ORIGINAL: 1QwkSport2.5r

The hull will need to be good size to accommodate the huge props that engine will turn. My big boat has an ST .90 on it using 12-13'' props; the hull size is 38''x18''x3.5''. I'm guessing the 1.55 will be running maybe a 16'' prop? I'd plan on 40-44'' length, 22-24'' width, and depth/draft will depend on the weight of the engine and all of the components you will need to put on the hull to run it. My above mentioned boat is about 7.5lbs RTR, you'll want to expect 10-14lbs or so for a faster hull and 20lbs for a slow stable hull.

These are guidelines. If you want other information, I can point you to an Airboat resource that has a lot of Gasser folks building big hulls for converted weedie and chainsaw engines. Just PM me.

Tim

p.s. Here are two of my 4 airboats. All scratchbuilt by me using balsa, liteply, birch ply, and lots of epoxy. These two are both SuperTigre powered, small one is 14''x26''x2.5'' and has a S.29 on it turning 9x4-9x6APC props. The big one with the S.90K is running either 12x5, 13x4W, or 13x5-6 props.
http://i153.photobucket.com/albums/s...R/IMG_0097.jpg

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ORIGINAL: Ram Jet


Beautiful hulls. I like the fact that you used epoxy. I've hear of guys usung CA glue on their hulls which I think is too brittle to withstand the beating a powerboat hull can take on choppy water. Since you offered I will PM you. I would like to learn more about airboats, some call them ''Swamp Gliders''. I was going to scale down plans from Glen-L whos sells boat plans for full scale hulls. They have a really nice airboat plan in their line. Well, better get off this boat stuff the Sky Pilots will get ticked off. PM coming.

Thank you,
Bill

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ORIGINAL: ryanbrown1

<![if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument></xml><![endif]><![if gte mso 9]><xml> <w:LatentStyles DefLockedState=''false'' LatentStyleCount=''156''> </w:LatentStyles></xml><![endif]><![if gte mso 10]><style> Style Definitions */ table.MsoNormalTable {mso-style-name:''Table Normal''; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:''''; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:''Times New Roman''; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;}</style><![endif]><p class=''MsoNormal''>Hello All,</p><p class=''MsoNormal''> I am relatively new to the hobby and have come into an old HiroboShuttle helicopter which has an Enya SS 30 engine. The engine was totally lockedup but I have managed to free it up and disassemble most of it. Are there anygood sites that sell parts for this older engine or gives repair info? I knowthat I will have to have to at least have new bearings and rings for thepiston. Is there any way to find out the specs of the two sets of bearings sothat I can explore aftermarket options? <span> </span>Anyinfo would be most appreciated.</p>

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ORIGINAL: ryanbrown1

Im thinking they are rusted...what do you think?

[img][/img]

[img][/img]

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ORIGINAL: earlwb

AAC is pretty good, but if you have a AAC engine overheat from a lean run too much, the aluminum cylinder sleeve won't shrink back and you lose the pinch at TDC. ABC on the other hand, the brass sleeve will still try to shrink back and you get the pinch back at TDC (at least most of the time). Aluminum has that characteristic of expansion when heated, but heated beyond a certain temperature, it tends to stay expanded more after cooling off. You sometimes see the effect when someone overheated a crankcase to replace the bearings and the discover the new bearings are a bit loose now.

Anyway that is probably why the discontinued the AAC piston and liners. Also ABC cylinder/pistons seem to produce a bit more power than the AAC ones do in some engine designs. Interesting paradox.

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ORIGINAL: buzzard bait

An Enya 30SS with rings? Well, the heli version must be different. Those SS models have had a lot of variants.

Are you sure the bearings are actually rusted and not just gunked up with old castor? If they really are, then yes, go with rcbearings.com for sure.

Jim

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ORIGINAL: ryanbrown1

i am not sure what a lapped iron/steel or AAC engine is but my Enya SS30 BB has (well had, it broke into peices as soon as the piston was removed) a little ring around the piston just under the top of it, where rings on regular sized engines would normaly go. There was just one ring.

I have already ordered new bearings.

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ORIGINAL: 1QwkSport2.5r

I got my Enya 60-4C in the mail yesterday.... She's quite the brute! It appears to be un-run, but its dirty and the bearings are ''gritty''. Someone put an Idlebar Fox glow plug in it which I will switch out for a normal glow plug. Compression is very good. I'll clean it up and open it up to see if there is any rust inside or not. The bearings have me leary, so if after looking it over I find the bearings to be sketchy, I'll order some new ones. The ''muffler'' doesnt look to be much of a muffler. It looks homemade from what I can tell. I doubt it will be more offensive noise-wise than any 2-stroke I have so I'll try it out as-is. If its too noisy, I'll find a muffler for it.

I'm not sure what I'll put it on just yet, I just wanted one for my collection. Its a very handsome engine. It'll keep my SS30BB company for now.


http://i153.photobucket.com/albums/s...IMG_0100-3.jpg
http://i153.photobucket.com/albums/s...IMG_0101-1.jpg

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