New small turbine??
01-17-2004, 09:39 PM
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RE: New small turbine??
Thanks for the posting of the article. Wonder if Kyosho or Hot Bodies will come through with new jets designed around this unit.
JR
JR
01-18-2004, 04:36 AM
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RE: New small turbine??
Vincent
As you know i fly Wren 44 which is currently the smallest in the world, we have had 'bar' discussions over how practical it is to go smaller. I think the 44 is the smallest practical size, it weighs 1lb but gives 8.5 lbs of thrust. The problem with going smaller is that the weight does not drop much, you still need batteries, pumps, valves etc. and you still need to carry fuel. I would think this baby is going to be thirsty.
The model can not be too small as you need to carry all this and fuel.
So
Engine 1lb
batteries etc 1lb
Fuel 1lb
That leaves you 1.5lb for airframe, radio retracts etc, if you want a 1/1 power to weight.
I am not saying it could not be used but is it worth it?
I feel it is a case of diminishing returns, the Wren 44 as you know is practical with great power to weight, it is novel to go smaller but????
As you know i fly Wren 44 which is currently the smallest in the world, we have had 'bar' discussions over how practical it is to go smaller. I think the 44 is the smallest practical size, it weighs 1lb but gives 8.5 lbs of thrust. The problem with going smaller is that the weight does not drop much, you still need batteries, pumps, valves etc. and you still need to carry fuel. I would think this baby is going to be thirsty.
The model can not be too small as you need to carry all this and fuel.
So
Engine 1lb
batteries etc 1lb
Fuel 1lb
That leaves you 1.5lb for airframe, radio retracts etc, if you want a 1/1 power to weight.
I am not saying it could not be used but is it worth it?
I feel it is a case of diminishing returns, the Wren 44 as you know is practical with great power to weight, it is novel to go smaller but????
01-18-2004, 10:00 AM
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RE: New small turbine??
ORIGINAL: GrayUK
snip<The model can not be too small as you need to carry all this and fuel.
So
Engine 1lb
batteries etc 1lb
Fuel 1lb
That leaves you 1.5lb for airframe, radio retracts etc, if you want a 1/1 power to weight.
I am not saying it could not be used but is it worth it?
snip<The model can not be too small as you need to carry all this and fuel.
So
Engine 1lb
batteries etc 1lb
Fuel 1lb
That leaves you 1.5lb for airframe, radio retracts etc, if you want a 1/1 power to weight.
I am not saying it could not be used but is it worth it?
Ewald Shuster has one he built, that is that small. His worked great! 200,000 RPM!
01-18-2004, 10:52 AM
#16
RE: New small turbine??
Hi Gray,
Yes, you are flying one of those L-39 kits with a 44.I have some experience with the wren 44 with my friends ME-262. That is one sweet powerful little motor, they did not miss a beat. Just a little finnicky to light off, probably just us not getting the gas flow right.
V..
Yes, you are flying one of those L-39 kits with a 44.I have some experience with the wren 44 with my friends ME-262. That is one sweet powerful little motor, they did not miss a beat. Just a little finnicky to light off, probably just us not getting the gas flow right.
V..
01-18-2004, 03:35 PM
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RE: New small turbine??
If you note i said batteries etc.
You need an ecu ,pump and ecu batteries
I just approximated at 1lb
Wren 44 does 190,000 will go higher but is restricted to that level.
You need an ecu ,pump and ecu batteries
I just approximated at 1lb
Wren 44 does 190,000 will go higher but is restricted to that level.
01-18-2004, 03:38 PM
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RE: New small turbine??
Vincent
The gas flow is temperature sensitve, it took me a few starts to get it right, but it is not a problem.
You are right they are sweet!
The gas flow is temperature sensitve, it took me a few starts to get it right, but it is not a problem.
You are right they are sweet!
01-19-2004, 10:55 AM
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RE: New small turbine??
Myers:
Thanks for the info, great thing to get out here.
Is there a contact address/web site or any other information regarding a place to contact for purchase?
Please! list any information if there is any and or if you have the time. We do not get the MAN mag and would shurley love to get one of these units.
Thanks again.
GF
Thanks for the info, great thing to get out here.
Is there a contact address/web site or any other information regarding a place to contact for purchase?
Please! list any information if there is any and or if you have the time. We do not get the MAN mag and would shurley love to get one of these units.
Thanks again.
GF
