SPA Engine (2 stroke .61 side exhaust)
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SPA Engine (2 stroke .61 side exhaust)
What would you put in a Dirty Birdy or a Mach 1? New or vintage, doesn't matter just trying to get some ideas. - something that's relatively easy to obtain.
I've been mulling over the K&B Twister 6050, HP Gold Cup, SuperTigre S61 (already own), or even a Fox Eagle (I aint skeerd), Rossi ect, you know, something with charactor. I also want it to pull the plane around like a rag doll. : )
I've been mulling over the K&B Twister 6050, HP Gold Cup, SuperTigre S61 (already own), or even a Fox Eagle (I aint skeerd), Rossi ect, you know, something with charactor. I also want it to pull the plane around like a rag doll. : )
#2
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RE: SPA Engine (2 stroke .61 side exhaust)
Keep the DB light. Around the 7 lb arena. Mine weighed in at 7#-4oz, put a ST S61 with tune pipe (it was a quiet pipe so called),l 11x7 3/4 prop plane equipped with retracts.
Today I would do the same, only use APC 11x8.
Main thing is keep the plane light and don't worry about the wind. It'll dom just fine.
I have a new all wood DB in the box to be built, and have a ST S61 wating for it with Robart mechanical retract (two wheel) same as old.
Crashlander
Today I would do the same, only use APC 11x8.
Main thing is keep the plane light and don't worry about the wind. It'll dom just fine.
I have a new all wood DB in the box to be built, and have a ST S61 wating for it with Robart mechanical retract (two wheel) same as old.
Crashlander
#3
RE: SPA Engine (2 stroke .61 side exhaust)
i've got a just barely broken in hirtenburger .61 w/ muffler that has outstanding pull. i would sell it cheap. it's not a gold cup though.
david
david
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RE: SPA Engine (2 stroke .61 side exhaust)
I flew my Dirty Birdi's with a Webra Speed .61, flow thru muffler (no tuned pipe), Southern retracts. Perfect combo. I used a Kraft .61 (now RJL) on my Mach 1. Not as strong as the Webra. I have a new Webra Speed .61 for my "on the board" Tiporare.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
Allthegoodnamesaretaken,
I have a Dirty Birdy 60 kit from Bluejay. I plan on putting Rhom-Air retracts and a pumped K&B61 in it without a pipe. I plan on keeping the model as light as possible. I just hope the old K&B will be enough..
I have a Dirty Birdy 60 kit from Bluejay. I plan on putting Rhom-Air retracts and a pumped K&B61 in it without a pipe. I plan on keeping the model as light as possible. I just hope the old K&B will be enough..
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RE: SPA Engine (2 stroke .61 side exhaust)
I also have an OS .55AX, and it is a great engine for overpowering .40 size airplanes, I've also had two Dirty Birdi's, but I don't think you can build a Dirty Birdi light enough to have it perform as it would with an average .60/.61 size engine much less with a high performance .61.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
Depends on how you want to use the DB. If you want to compete, I recommend a high performance .61, such as Webra Speed, HP Gold Cup, Rossi, Jett. If you're just going to sport fly, your ST should be fine.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
I agree... there quite a few really good engines out there.... including the OS .75AX. I have one of these as well. Need to be careful though, if you expect to compete, the .75 will be illegal in all the "old time" pattern events.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
I downloaded BPA "rules" a few days ago, and I'm pretty sure the .61 limit for two-strokes is in effect.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
You're right... I concede.
By the way, what a beautiful job you're doing with your Phoenix finishing thread. I applaud you.
ChiefK
By the way, what a beautiful job you're doing with your Phoenix finishing thread. I applaud you.
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
Thanks Chief. That Phoenix 6 has traveled around with me for about 30 years. Finally getting back to it. I have more Phoenix' here, and may get another 6 together after this one. There is two Vertigo's here also, so lot of stuff to do.
I have more projects to do here around the house, and I work part time, so the building has gotten a little slow right now. Should try to get the fuselage painted next week if it drys out here. Lot of storms in the last 10 days, and now another down by Cuba, looks like it will miss us. I have been thru hurricanes, five in Wilmington, NC and three here. House is 155 knots proof, metal roof and all the good stuff. I am attaching the control surface's soon on the P-6, run nylon tubing where needed, get some JR DS821's.
Thanks for the nice comments, stay tuned.
Crank
I have more projects to do here around the house, and I work part time, so the building has gotten a little slow right now. Should try to get the fuselage painted next week if it drys out here. Lot of storms in the last 10 days, and now another down by Cuba, looks like it will miss us. I have been thru hurricanes, five in Wilmington, NC and three here. House is 155 knots proof, metal roof and all the good stuff. I am attaching the control surface's soon on the P-6, run nylon tubing where needed, get some JR DS821's.
Thanks for the nice comments, stay tuned.
Crank
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RE: SPA Engine (2 stroke .61 side exhaust)
I've had both the DB and the Mach 1. They're both great planes, but I think my DB's flew better than my Mach 1. I see Crank is recommending the other way. You'll have to make up your own mind.
ChiefK
ChiefK
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RE: SPA Engine (2 stroke .61 side exhaust)
ORIGINAL: ChiefK
I've had both the DB and the Mach 1. They're both great planes, but I think my DB's flew better than my Mach 1. I see Crank is recommending the other way. You'll have to make up your own mind.
ChiefK
I've had both the DB and the Mach 1. They're both great planes, but I think my DB's flew better than my Mach 1. I see Crank is recommending the other way. You'll have to make up your own mind.
ChiefK
I too prefer the DB over the Mach 1, in flight performance. The DB is more symmetrically designed. The Mach 1, while beautiful, is a very assymetrically designed model. Give me symmetry and a long fuselage any day.
Ed Cregger
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RE: SPA Engine (2 stroke .61 side exhaust)
ORIGINAL: Ed Cregger
I too prefer the DB over the Mach 1, in flight performance. The DB is more symmetrically designed. The Mach 1, while beautiful, is a very assymetrically designed model. Give me symmetry and a long fuselage any day.
Ed Cregger
ORIGINAL: ChiefK
I've had both the DB and the Mach 1. They're both great planes, but I think my DB's flew better than my Mach 1. I see Crank is recommending the other way. You'll have to make up your own mind.
ChiefK
I've had both the DB and the Mach 1. They're both great planes, but I think my DB's flew better than my Mach 1. I see Crank is recommending the other way. You'll have to make up your own mind.
ChiefK
I too prefer the DB over the Mach 1, in flight performance. The DB is more symmetrically designed. The Mach 1, while beautiful, is a very assymetrically designed model. Give me symmetry and a long fuselage any day.
Ed Cregger
Yes the Mach 1 is sexy. That's why I want to build one. I hear nothing but good things about the flight performance of the Dirty Birdy and it has some very classy lines as well.
Well, as soon as the brown truck gets here I'll get started. Maybe a build thread is in order? Haven't seen one yet on the DB.
I'd like to do retracts too. But I'd like to make it a tail dragger to save weight. I'm sure that's been done before.
Thanks for the input guys. : )
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RE: SPA Engine (2 stroke .61 side exhaust)
You're going to use a NovaRossi with a tuned pipe and then leave the wheels hanging in the wind?????? Say it isn't so.
ChiefK
ChiefK