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  #11  
Old 07-02-2014, 01:52 PM
SuperCubDriver SuperCubDriver is offline
 
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Will you also do tests with different ignition systems? P-Mags? Would be interested in the differences vibrationwise.
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  #12  
Old 07-02-2014, 09:30 PM
glenn654 glenn654 is offline
 
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Not meaning to be obnoxious but I thought the 409 was supposed to put out 230 hp or am I mistaken?

Glenn Wilkinson
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  #13  
Old 07-02-2014, 10:10 PM
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I was kinda surprised by the low number there too, is the 409 Parallel or Angle valve?
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  #14  
Old 07-02-2014, 10:16 PM
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Quote:
Originally Posted by Relentless View Post
Mojo,

I can tell you the the difference between the 194hp 370 and 212 hp 409 was dramatic on climbout. I hope the couterweighted 370 will perform better.
I am confused by this comment, did you mean difference in vibration or something else?

Great job undertaking these tests, like others have said Hartzell would be very remiss if they passed over the opportunity. The strength of the team is much greater than the sum of the individuals.
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  #15  
Old 07-05-2014, 06:40 AM
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Quote:
Originally Posted by glenn654 View Post
Not meaning to be obnoxious but I thought the 409 was supposed to put out 230 hp or am I mistaken?

Glenn Wilkinson
We now have 3 versions of the 409, a standard parallel which puts out 210hp and 410lbs of torque, an angle valve version which is 230hp and 450lbs of torque, and the RSeries 409 which developes 230hp and 450lbs of torque but weights in under 300 lbs.

As a comparison we tested a ycoming 390 off one of the Aerodynamix RVs and it made a disappointing 205hp......not the advertised 215hp....
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  #16  
Old 07-05-2014, 06:45 AM
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Relentless Relentless is offline
 
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Quote:
Originally Posted by Doug View Post
I am confused by this comment, did you mean difference in vibration or something else?

Great job undertaking these tests, like others have said Hartzell would be very remiss if they passed over the opportunity. The strength of the team is much greater than the sum of the individuals.
The difference was the feeling in the seat of you're pants, everyone likes to talk about hp but what I will show the world very soon is how much better our stroker engines perform because of the torque they produce at around 2500 rpm.

Hartzell did testing on our engines back in 2009, I will be inviting them to test again once we finish Oshkosh.
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  #17  
Old 07-05-2014, 07:06 AM
BillL BillL is offline
 
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Quote:
Originally Posted by Relentless View Post
We now have 3 versions of the 409, a standard parallel which puts out 210hp and 410lbs of torque, an angle valve version which is 230hp and 450lbs of torque, and the RSeries 409 which developes 230hp and 450lbs of torque but weights in under 300 lbs.

As a comparison we tested a ycoming 390 off one of the Aerodynamix RVs and it made a disappointing 205hp......not the advertised 215hp....
That (lower speed) torque advantage will really show in cruise settings! Lots of good pireps expected from that.

A curious question, what oil viscosity and temperature do you use for the standard power testing?

Also with the higher Cubes, how do you improve the breathing to get the air to go with fuel? No secrets, just generally.

Thanks for being here BTW- it is great having some direct contact with engine builders!
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Last edited by BillL : 07-05-2014 at 07:09 AM. Reason: clairifcation
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  #18  
Old 07-05-2014, 09:03 AM
dealfair dealfair is offline
 
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Default Thank you and your crew.

I really appreciate what you all are doing and keeping us informed. One of these days I want to upgrade; and the Titan 340 is heading up my daydreams.

Best in your endeavors.
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  #19  
Old 07-05-2014, 09:15 AM
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Quote:
Originally Posted by Relentless View Post
As a comparison we tested a ycoming 390 off one of the Aerodynamix RVs and it made a disappointing 205hp......not the advertised 215hp....
Well, in fairness, they've always been advertised at 210.

http://www.lycoming.com/Lycoming/PRO...ngineData.aspx

And Titan literature advertises 205 for the base parallel valve 409, with 10.5 CR. The low weight is attractive. Does it have pendulum absorbers?

http://www.titanengine.com/wp-conten...n_041614-3.pdf

FWIW, my 390 did 205 on the Barrett dyno with just over 1 hour on the clock, and it has loosened up quite a bit since then. Dead stock kit motor (8.9 CR, Airflow, Slicks) with balancing, back when you could still buy a kit motor.

Kevin, how many hours on the A-Team 390? I know of a well-flogged acro 580 in for overhaul, so maybe we'll soon have some wear data for the big bore cylinder.
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Last edited by DanH : 07-05-2014 at 09:33 AM.
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