Jet weight
02-07-2003 | 12:55 PM
#2
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Jet weight
I will keep the weight to 1:1.5 to 2 ratio. For high lift airframe, you can go to as high as 1:2.5. That's it, 14lbs turbine will power a jet up to 2.5 times its thrust rating. 1:1 ratio will give you ballistic performance. I fly my Avonds F15 at 8kgs and F9F Panther at 11kgs with 5kgs thrust turbine.
B777
B777
02-07-2003 | 07:52 PM
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Jet weight
Type of airframe is also very important. Kangaroo is high lift and will fly nicely even with small thrust. I also fly my Kangaroo with 12 lbs J600 turbine. Take Mig21 and you will need 1:1 ratio to get airborne.
B777
B777
02-07-2003 | 07:59 PM
#6
Jet weight
Yes I agree B777,
I also flew a Cermark MB339 with the same engine and about the same weight. Performance was marginal to say the least.
I guess airframe selection is what its al about
Gary
I also flew a Cermark MB339 with the same engine and about the same weight. Performance was marginal to say the least.
I guess airframe selection is what its al about
Gary
02-07-2003 | 08:32 PM
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Jet weight
On the contrary, our Cermark MB339 flies nicely with the J600 pushing 12lbs thrust as measured with scale on the nose. Do you get 12lbs or more when installed with the tail pipe? You may need to adjust the cone/pipe clearance to get the optimum thrust.
B777
B777
02-08-2003 | 05:00 PM
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Jet weight
Originally posted by B777
On the contrary, our Cermark MB339 flies nicely with the J600 pushing 12lbs thrust as measured with scale on the nose. Do you get 12lbs or more when installed with the tail pipe? You may need to adjust the cone/pipe clearance to get the optimum thrust.
B777
On the contrary, our Cermark MB339 flies nicely with the J600 pushing 12lbs thrust as measured with scale on the nose. Do you get 12lbs or more when installed with the tail pipe? You may need to adjust the cone/pipe clearance to get the optimum thrust.
B777
Exists some rule or specifications for tailpipe? For a good performance, they exist measured special of pipe for a turbine of 14lbs? Type length and diameter? Adjust?
Thanks.
Fabio
