Tartan twin 77 (Full Version)

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genek -> Tartan twin 77 (6/16/2003 2:05:20 AM)

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



rglgatortail -> RE: Tartan twin 77 (9/10/2006 4:50:03 AM)

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



coralcape -> RE: Tartan twin 77 (9/10/2006 12:06:10 PM)

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



loughbd -> RE: Tartan twin 77 (9/10/2006 7:27:26 PM)

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.



dennis -> RE: Tartan twin 77 (9/11/2006 12:36:16 PM)

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



Donairplane -> RE: Tartan twin 77 (9/15/2006 3:26:47 AM)

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.



dennis -> RE: Tartan twin 77 (9/15/2006 12:11:13 PM)


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



loughbd -> RE: Tartan twin 77 (9/15/2006 6:29:46 PM)

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



Hobbsy -> RE: Tartan twin 77 (9/15/2006 7:13:20 PM)

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.



Donairplane -> RE: Tartan twin 77 (9/17/2006 6:44:25 AM)

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.



dennis -> RE: Tartan twin 77 (10/8/2006 2:00:15 PM)


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.



Tommygun -> RE: Tartan twin 77 (10/8/2006 5:34:35 PM)

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.



Donairplane -> RE: Tartan twin 77 (10/9/2006 8:21:51 AM)

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.



thisoldman -> RE: Tartan twin 77 (12/12/2007 1:34:38 PM)

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.



w8ye -> RE: Tartan twin 77 (12/12/2007 2:50:38 PM)

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



thisoldman -> RE: Tartan twin 77 (12/14/2007 1:32:33 AM)

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.



w8ye -> RE: Tartan twin 77 (12/14/2007 1:47:29 AM)

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



thisoldman -> RE: Tartan twin 77 (12/14/2007 7:05:18 PM)

does anyone have idea on where i can get a good set of mufflers for the tartan.. the ones that came with it are like straight pipes.. sounds like im on a aircraft carrier again.. man they are loud.
looking for pitts type. if anyone know of someone that makes them for this engine would appreciate if you can give me the info or webb sight..
thanks



dennis -> RE: Tartan twin 77 (12/14/2007 7:53:03 PM)

Bisson did make them for the motor a few years ago. I'd give them a try.
Also Bob Davis a has some excellent mufflers for the motor, They aren't cheap and they are a little heavy but they will tame that motor and probably go a long way towards saving your field.
Dennis



dirtybird -> RE: Tartan twin 77 (12/16/2007 3:51:03 PM)

I had one several years ago. It had a magneto and a pull starter. I sold it without running it.



Tony D -> RE: Tartan twin 77 (4/24/2008 4:37:34 PM)

Hello from sunny Spain. Just been reading your article ofn tyhe Tartan Twin 77G. My friend who does not have on line access has a brand new motor minus a muffler. Can you advise me of where the two sites you mention are for mufflers, please so he can make enqs to get one.



thisoldman -> RE: Tartan twin 77 (4/24/2008 6:30:53 PM)

go to www.bison.com and you can get one there... al



wolfstar650 -> RE: Tartan twin 77 (4/30/2008 2:54:33 PM)

My dad has a Tartan Twin T77G 2.66ci that has a Dellorto carb and the diaphragm is shot in it. Anyone know which Walbro carb fits?



thisoldman -> RE: Tartan twin 77 (4/30/2008 11:04:44 PM)

a wt644 will fit it..



wolfstar650 -> RE: Tartan twin 77 (5/1/2008 12:29:40 AM)

Thanks for the info. I'll call him tonight and he'll get one on order. Thanks a bunch!



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