GrantB
Junior Member
Joined: February 2012
Posts: 61
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Post by GrantB on Aug 11, 2013 13:45:17 GMT -5
I was in the planning stage of a small stream liner that would use 2-3 of these turbines. After doing as much research as possible about actual HP figures and not finding any available charts I sent an email to Walker power systems which was formerly Tiernay Turbines. The man I spoke with told me that the tt-10 can only make between 25-35hp maximum. I was quite dissapointed since everywhere online mentions 80-300hp one source of these numbers is from the university of cincinatti so I figured it would be in the right ballpark.
I thought I would make this known so no one else has expectations of a higher powered turbine.
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cursorkeys
Veteran Member
Proper engines use the Brayton cycle
Joined: July 2012
Posts: 108
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Post by cursorkeys on Aug 11, 2013 15:19:04 GMT -5
That sucks for your application but a lot of the turbine power figures floating round the web seem to be , at best, optimistic. The TT-10 was designed for a 10KW GPU, so a 20HP load I guess allowing for mechanical ineffiencies.
Unless the rating is on the engine plate or in the manual its best to run some numbers and see if the figures even make sense.
edit: if you want around 300HP then how about a Beoing 502? They are still turning up at fairly reasonable prices and seem like nice, reliable little turboshafts.
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Post by turbochris on Aug 12, 2013 8:12:51 GMT -5
the 502 I see only 150 hp, T-50 higher hp but harder to find.
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cursorkeys
Veteran Member
Proper engines use the Brayton cycle
Joined: July 2012
Posts: 108
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Post by cursorkeys on Aug 12, 2013 8:45:26 GMT -5
Darn, you're right. I was spelunking in FlightGlobal and found the announcement for a '502-14' but everywhere apart from FlightGlobal shows it's really called a T50-BO-10.
According to the web the T50 was used on a really cute unmanned helicopter drone (QH-50). One of those would be good fun to play with!
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GrantB
Junior Member
Joined: February 2012
Posts: 61
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Post by GrantB on Aug 12, 2013 12:55:05 GMT -5
I will have the do a little more research about the t50. Wasn't really aware of the difference between it and the 502. I was looking into the allison 250 but was getting sticker shock. Doesn't has the same HP/$ ratio as some of the bigger turbines lol.
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Post by Richard OConnell on Aug 12, 2013 17:13:50 GMT -5
yeah, I've been drooling over the allison 250's for a while now, but they are a bit pricey. There is a Russian engine that is similar to the a250, dont remember what it's called off hand but they go for around half the price of the allison.
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Post by Johansson on Aug 13, 2013 1:45:04 GMT -5
Isotov GTD-350
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cursorkeys
Veteran Member
Proper engines use the Brayton cycle
Joined: July 2012
Posts: 108
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Post by cursorkeys on Aug 13, 2013 2:45:24 GMT -5
Only problem on the GTD-350 could be the weight, they are a hernia-inducing 140kg! Good old solid Russian engineering, the cast casing looks like it was chiseled by hand
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Post by turbochris on Aug 13, 2013 9:02:02 GMT -5
for you cursorkeys. I have about 30 pics of this poor girl. This was in the best part of warner robbins air force museum, the junkyard behind the museum w the KEEP OUT signs. Last report is the poor girl is gone. I watched the surplus listings and never saw it come up. Hopefully it's in the rebuild hanger it's an impressive piece. Then it will go to the less best part of the museum.
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Post by turbochris on Aug 13, 2013 9:03:15 GMT -5
BTW I'm looking for a good T50 myself.
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cursorkeys
Veteran Member
Proper engines use the Brayton cycle
Joined: July 2012
Posts: 108
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Post by cursorkeys on Aug 13, 2013 19:36:50 GMT -5
Great pic but a real shame about the condition it was in I hope it's being restored, that would be a pretty unique thing to have in a museum.
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Aug 21, 2013 22:48:42 GMT -5
Had a bit of a look at the Tierney tech details and the circuit breaker on the generator has an interrupt capacity of 3500amps at 28vdc which I think is 98kw or 131hp. So the engine has to be able to produce at least over that or there would be no need for the circuit breaker?
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Post by Drastyk333 on Aug 21, 2013 23:32:52 GMT -5
I agree with you on the HP out put on the TT-10 turbine.I was going to respond quite some time ago but didnt.I have a tag somewhere on my STUFF that i took off my TT-10 that the output was 100KW which equates to 134HP.For such a small engine [83lbs]they are one snorty little power plant.If you put on an exhaust nozzle that goes from the exhaust 4" down to 3" you will get aprox. 257mph exhaust out of it,Ive measured mine with a 350mph air speed indicator hooked up to a copper tubing to insert in the exhaust.The exhaust will rattle trees up to at least 350 ft away.like I say a pretty snorty turbine.
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gidge348
Senior Member
Joined: September 2010
Posts: 426
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Post by gidge348 on Aug 22, 2013 1:09:57 GMT -5
I have one as well still in the generator, had a quick look at the data plate and it only reads 10kw but I am sure this is only a de-rated value. When I start it the noise alone tells me its a LOT more than 13 hp. I have read that when tenders are called for a particular application rather going through the whole design project again the companies usually use a generic over powered unit and back it off a little.
Ian...
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Post by Drastyk333 on Aug 22, 2013 2:18:08 GMT -5
The 10KW refers to the output of the generator that is or was attached to the turbine.John
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