Tartan twin 77

Tartan twin 77
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Tartan twin 77 - 6/16/2003 2:05:20 AM

genek

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From: AZ
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I was wondering if anyone has used the old Tartan 77 twin gas engine. Is the two cylinder more of a headache than singles? It seems a bit heavy but if it will turn a big prop I'm happy. What size prop would you use, are these engines reliable? Thankyou, Gene K

RE: Tartan twin 77 - 9/10/2006 4:50:03 AM

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From: pensacola, FL, USA
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i have been looking for either a tartan or a mac twin engine, and i was wondering if you would consider in selling your tartan or if you found a way to get it to run?

Thanks
Robert

(in reply to genek)

RE: Tartan twin 77 - 9/10/2006 12:06:10 PM

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From: cape caoral, FL, USA
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I have a tartan I bought from a friend. It is a real stump puller. I use a 20x8 APC, never measured thrust, but it pulls Midwest Extra-300 very well. It a an alchol model and the only trouble is the inverted carb. Takes a lot of prime to get started. I built a heavy duty electric starter from a riding mower and now no problems. I always said if it went bad I would just clean it up, mount it on a piece of mahogany and put it on the mantle

) It's a beautiful engine. Good luck, red

(in reply to rglgatortail)

RE: Tartan twin 77 - 9/10/2006 7:27:26 PM

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From: Bremerton, WA, USA
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I have a Tartan Twin and a Tartan single. The twin is on a G-Shark. Hauls it around with authority. It is a simple engine to set up and handstarts easily. I have no problems choking it as it has a built in choke. It has one minor draw back. Being a reed valve engine, it will run backwards. You have to be careful handstarting it or having the idle a little low so it backfires and starts running the wrong way. If it starts backwards it can back off the table or wander away from you in the wrong direction. Happened to me once. About 1/4 throttle and it started backwards. Kind of exciting.

It doesn't run on regular glow fuel. The recommended fuel is straight methanol with 8% castor oil. I mix my own fuel but you could buy FAI fuel and mix it with a gallon and a half staight methanol. That will give you 8% oil.

The prop I use is an 18x8 Zinger.

My old man has an OLD Morrisey Bravo with a Tartan twin on it. The plane is over 16 years old and the engine is older and it runs great.

(in reply to coralcape)

RE: Tartan twin 77 - 9/11/2006 12:36:16 PM

dennis

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First of all the Tartan twin is probably the lightest twin of 2.7 C.I that you will ever buy or fly. It has one of the highest power to weight ratios of any motor in it's displacement.
It does start backwards but only of you dont put some heft into your flip of the prop, it's easier at times to bump it off compression and let it kick to life. To reverse it just close the throttle to where it's about ready to quit and drag the spinner. It will bump and go the right direction. Usually we never have to touch the spinner the motor will do it it'self.
Really better to use a 20 inch prop or better, an 18/8 will tend to run it close to the bloodline of 11K and you can really ruin your day when the shafl lets go.
Never use nitro in the motor. It has an 11.1 compression ratio and will seriously overheat and fry the right cylinder if you do insist on doing it.
Motor comes in two states of tune. The standard Tartan and the Super tartan which has a true Schnurle port and a slightly better carb arrangement and higher finned heads. There are some nice after market items available for the motor and decent mufflers from Bisson. The stock are for looks and to say that there are mufflers with the motor. Don't use them if you want to keep your field. If that doesn't matter then ler her rip and enjoy the wail of a twin at full song.
Cline regulators are the sole importers of the motor and they don't list prices but ask you to call, reason, they are pricey at $750.00 plus.
Motors show up somewhat often on the bay and here in the classified section with prices usually at $300.00 to $550.00.
Oh and one more thing, a 2.7 C.i glow motor is not known for it's fuel efficiency. We used 32 to 50 of of fuel for our planes and it was cheaper to buy a 55 gallon drum of menthanol and a case of Klotz KL100 and mix our own fuel. You need less then 10% oil in a properly broken in motor and I usually used 7%,'I have about 5/6 of the twins in both varients and about the same on singles.Also a diesel twin and single, however your not ready for that, are you?
Dennis

(in reply to loughbd)

RE: Tartan twin 77 - 9/15/2006 3:26:47 AM

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From: Aurora, OR, USA
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Also the Tartans with the tall head fins are 3 ci. and will pull a 20 lb. plane out of sight! Engine should be prop for 8000 rpm. See instructions with engine. Don.

(in reply to dennis)

RE: Tartan twin 77 - 9/15/2006 12:11:13 PM

dennis

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quote:

ORIGINAL: Donairplane

Also the Tartans with the tall head fins are 3 ci. and will pull a 20 lb. plane out of sight! Engine should be prop for 8000 rpm. See instructions with engine. Don.

Actually they are still 2.7C.I. They use the same piston, rings and upper cylinder as the standard.

Dennis

(in reply to Donairplane)

RE: Tartan twin 77 - 9/15/2006 6:29:46 PM

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He's right about that. they are still 2.7 cid.

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RE: Tartan twin 77 - 9/15/2006 7:13:20 PM

Hobbsy

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http://www.billsroom.com/pcfs/products/Tartan/tartan.htm

According to Jim's site the twin has a 2mm larger bore and displaces 3.05 cu. in.

< Message edited by Hobbsy -- 9/15/2006 7:23:50 PM >

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RE: Tartan twin 77 - 9/17/2006 6:44:25 AM

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Dennis, Please look at bills room web sight, Tartans have been 3.05 cu. in. for at least 8 years I can think of. I bought my first one around there. My instructions say 50cc (3 cu. in.) These engines are Schnuerle scavenging and make 5.75 BHP at 9000 RPM. Don.

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RE: Tartan twin 77 - 10/8/2006 2:00:15 PM

dennis

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quote:

ORIGINAL: Donairplane

Dennis, Please look at bills room web sight, Tartans have been 3.05 cu. in. for at least 8 years I can think of. I bought my first one around there. My instructions say 50cc (3 cu. in.) These engines are Schnuerle scavenging and make 5.75 BHP at 9000 RPM. Don.

Yep they said that 10 years ago . It's still a 2.7. Just checked the piston parts numbers and they haven't changed since I got my last set.Horsepower ratings and rpm numbers havent changed either.

(in reply to Donairplane)

RE: Tartan twin 77 - 10/8/2006 5:34:35 PM

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I remember those were the hot setup years ago. I seem to recall a model magazine featuring one in something they called a Kanary bipe.

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RE: Tartan twin 77 - 10/9/2006 8:21:51 AM

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Dennis, Not sure about part numbers, but a bore of 34mm.(1.34in.) and a stroke of 27mm.(1.06in.) is 2.99cu.in. when I do the math, correct me if wrong. Not sure how tartan got 3.05cu.in. My engine is the same. Check your bore and stroke, you might be surprised. Don.

(in reply to dennis)

RE: Tartan twin 77 - 12/12/2007 1:34:38 PM

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i just bought a tartan 77 engine.. has anyone converted one of these to gas. can't tell want carb other then walbro on it. would probably have to change it and resize the plug holes.. one other question. do both cyl fire at the same time or do the alternate. would really like some info on engine if anyone knows where to find more on it.

(in reply to Donairplane)

RE: Tartan twin 77 - 12/12/2007 2:50:38 PM

w8ye

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Its a boxer. Both fire at the same time

You most likely could use the same carb if it is a Walbro and is in good shape

All you need is an C-H ignition

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RE: Tartan twin 77 - 12/14/2007 1:32:33 AM

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does anyone have one of these engines that run on gas.. or has anyone converted one from glow to gas.. think it would be cheaper to run gas in it.
found all the parts, but trying to decided if i want to convert it over to gas.

(in reply to w8ye)

RE: Tartan twin 77 - 12/14/2007 1:47:29 AM

w8ye

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Read my post above!

All you need is a C-H ignition system http://www.ch-ignitions.com/

Look here in conversion engines

http://www.rcuniverse.com/forum/m_1267448/tm.htm

< Message edited by w8ye -- 12/14/2007 1:52:35 AM >

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