Aeronaut Rafale / Faesability
02-16-2006 | 12:05 PM
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From: Johannesburg, South Africa,
Aeronaut Rafale / Faesability
Hi Guys,
At this point I ask purely out of interest. I fly turbine jets and IC DF, with a fair amount of experience on both (on my 4th jet now).
I saw a video of what I think was the Aeronaut Rafale a long time back and was very impressed with its performance. I am keen to see where the limits are here while being sensible (not prices of turbines). First of all, what is the airframe like (quality and performance)? Retracts?
They list that it can accomodate 26 cells (I think), and in the reading I have done, it shows that to get 20N out of a Wemotec MIDI fan, one needs 24 cells or so. I assume these are NiCd's? Of course the jet is twin fan - Hence my first question is if using Lipo's, is it possible to get the thrust I am looking for (20N per unit), and will there be enough room for enough Lipo's to supply this thrust for 2 motors?
Secondly, what motor is capable of producing the 20N thrust in the MIDI fan?
Further, is the jet capable of accomodating larger fans?
Hence is it possible to get close to a 1:1 thrust to weight ratio?
And what total price are we looking at?
Thanks,
Richard Wylie
South Africa
At this point I ask purely out of interest. I fly turbine jets and IC DF, with a fair amount of experience on both (on my 4th jet now).
I saw a video of what I think was the Aeronaut Rafale a long time back and was very impressed with its performance. I am keen to see where the limits are here while being sensible (not prices of turbines). First of all, what is the airframe like (quality and performance)? Retracts?
They list that it can accomodate 26 cells (I think), and in the reading I have done, it shows that to get 20N out of a Wemotec MIDI fan, one needs 24 cells or so. I assume these are NiCd's? Of course the jet is twin fan - Hence my first question is if using Lipo's, is it possible to get the thrust I am looking for (20N per unit), and will there be enough room for enough Lipo's to supply this thrust for 2 motors?
Secondly, what motor is capable of producing the 20N thrust in the MIDI fan?
Further, is the jet capable of accomodating larger fans?
Hence is it possible to get close to a 1:1 thrust to weight ratio?
And what total price are we looking at?
Thanks,
Richard Wylie
South Africa
02-16-2006 | 02:39 PM
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From: Newcastle, UNITED KINGDOM
RE: Aeronaut Rafale / Faesability
rjwylieza
i still have lots to learn especially with regard comparison of I.C turbine and electric EDF [&:]
this is futher complicated by build materials [&:]
most turbine jets use Balsa etc..
at this point in time i am designing a BAE Hawk and what suprises me is that the calculaltions tell me it needs as much power to go vertical as it needs to be in a dive [&:]
conversion to electric is not as easy as you may think !
it is not a direct ounce for ounce .. pound fr pound..
Ray
ORIGINAL: rjwylieza
Hi Guys,
At this point I ask purely out of interest. I fly turbine jets and IC DF, with a fair amount of experience on both (on my 4th jet now).
I saw a video of what I think was the Aeronaut Rafale a long time back and was very impressed with its performance. I am keen to see where the limits are here while being sensible (not prices of turbines). First of all, what is the airframe like (quality and performance)? Retracts?
They list that it can accomodate 26 cells (I think), and in the reading I have done, it shows that to get 20N out of a Wemotec MIDI fan, one needs 24 cells or so. I assume these are NiCd's? Of course the jet is twin fan - Hence my first question is if using Lipo's, is it possible to get the thrust I am looking for (20N per unit), and will there be enough room for enough Lipo's to supply this thrust for 2 motors?
Secondly, what motor is capable of producing the 20N thrust in the MIDI fan?
Further, is the jet capable of accomodating larger fans?
Hence is it possible to get close to a 1:1 thrust to weight ratio?
And what total price are we looking at?
Thanks,
Richard Wylie
South Africa
Hi Guys,
At this point I ask purely out of interest. I fly turbine jets and IC DF, with a fair amount of experience on both (on my 4th jet now).
I saw a video of what I think was the Aeronaut Rafale a long time back and was very impressed with its performance. I am keen to see where the limits are here while being sensible (not prices of turbines). First of all, what is the airframe like (quality and performance)? Retracts?
They list that it can accomodate 26 cells (I think), and in the reading I have done, it shows that to get 20N out of a Wemotec MIDI fan, one needs 24 cells or so. I assume these are NiCd's? Of course the jet is twin fan - Hence my first question is if using Lipo's, is it possible to get the thrust I am looking for (20N per unit), and will there be enough room for enough Lipo's to supply this thrust for 2 motors?
Secondly, what motor is capable of producing the 20N thrust in the MIDI fan?
Further, is the jet capable of accomodating larger fans?
Hence is it possible to get close to a 1:1 thrust to weight ratio?
And what total price are we looking at?
Thanks,
Richard Wylie
South Africa
i still have lots to learn especially with regard comparison of I.C turbine and electric EDF [&:]
this is futher complicated by build materials [&:]
most turbine jets use Balsa etc..
at this point in time i am designing a BAE Hawk and what suprises me is that the calculaltions tell me it needs as much power to go vertical as it needs to be in a dive [&:]
conversion to electric is not as easy as you may think !
it is not a direct ounce for ounce .. pound fr pound..
Ray
02-17-2006 | 02:35 AM
#3
RE: Aeronaut Rafale / Faesability
Dare I do this....
There are a couple of really long threads about Aeronaut Rafale on "rcgroups.com". What you are looking for is probably already posted there. At the moment their "search" is down but look for the electric EDF jets section.
I did not find anything here.
There are a couple of really long threads about Aeronaut Rafale on "rcgroups.com". What you are looking for is probably already posted there. At the moment their "search" is down but look for the electric EDF jets section.
I did not find anything here.
02-17-2006 | 10:16 AM
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From: Johannesburg, South Africa,
RE: Aeronaut Rafale / Faesability
Hi Guys,
Thanks for the replies. Yes, I also scrounged around in the RCU stores, but couldn't find too much, or anything really applicable on the Rafale. I'm going to look at RCgroups thanks.
I did quite a lot of research into large EDF's about a year prior or so, but backed out when I saw the price and commitment therewith, and worse, the flight times. I was very keen to make an EDF spectre, but the cost of the powerplant was nearing that of turbines, but with the risk of burnt motors etc. Furthermore, LiPo cells have come a bit further (in safety at least) I guess. I still very keen to attempt this one day, but the price will have to justify it.
Hence for now, I'm entertaining what I spoke above. Can the Aeronaut rafale accept 2 x 120mm fans? or only 90mm in the twin config?
Cheers,
Richard
Thanks for the replies. Yes, I also scrounged around in the RCU stores, but couldn't find too much, or anything really applicable on the Rafale. I'm going to look at RCgroups thanks.
I did quite a lot of research into large EDF's about a year prior or so, but backed out when I saw the price and commitment therewith, and worse, the flight times. I was very keen to make an EDF spectre, but the cost of the powerplant was nearing that of turbines, but with the risk of burnt motors etc. Furthermore, LiPo cells have come a bit further (in safety at least) I guess. I still very keen to attempt this one day, but the price will have to justify it.
Hence for now, I'm entertaining what I spoke above. Can the Aeronaut rafale accept 2 x 120mm fans? or only 90mm in the twin config?
Cheers,
Richard
02-17-2006 | 02:12 PM
#5
RE: Aeronaut Rafale / Faesability
http://www.aero-naut.net/155.html?&L=1
http://www.aero-naut.net/156.html?&L=1
Apparently there are versions for a single 120mm fan or two smaller ones.
They talk about NiMH packs on the Aeronaut site but LiPos should be feasible. At least with LiPos, you will probably need some way to get cooling air to the pack(s) during flight.
http://www.aero-naut.net/156.html?&L=1
Apparently there are versions for a single 120mm fan or two smaller ones.
They talk about NiMH packs on the Aeronaut site but LiPos should be feasible. At least with LiPos, you will probably need some way to get cooling air to the pack(s) during flight.
