Cressline F-20?
02-03-2003, 01:09 PM
#27
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Cressline F-20?
I may be a little late with this but I also have a Cressline F-20. Built, in primer. Dynamax fan, OS 77 with pipe. I did not build a cheater hole in front of the fan, would I need to? Also, I planned on starting the engine through the intake, is this possible?
My field (surface) is not jet friendly so I would have to visit a different club just to fly. Im not sure if I wish to finish this model or sell the components.
EASYTIGER: Did you fly your F-20 yet? Wish to hear your comments. Thanks, Glenn
My field (surface) is not jet friendly so I would have to visit a different club just to fly. Im not sure if I wish to finish this model or sell the components.
EASYTIGER: Did you fly your F-20 yet? Wish to hear your comments. Thanks, Glenn
02-03-2003, 01:29 PM
#28
Cressline F-20?
Have not flown it yet, too damn cold! I get a feeling the cheater hole IS needed, otherwise the designer would not have put it there. Should be no problem at all starting it through the intake. The kit was designed right before the starter probe idea came out, that's why the plans don't talk about it. The kit reveiw that Bruce Mondeitz of Australia was kind enough to bring me talked about the "new" idea of starting the plane with a probe.
I think, but do not know, that this will be a lousy grass field airplane.
I think, but do not know, that this will be a lousy grass field airplane.
02-04-2003, 12:30 AM
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Cressline F-20?
G'day Easytiger,
What weight did your F-20 come out at?.
Did you end up finding a Dynamax for it?
I am getting to the end with mine,the cockpit is just about finished, I will post a couple of photos after I glue the canopy on. (painful job).
Missing New York, I will be coming back for another holiday in the future and this time i will have to bring the other half.
Regards
Brucem
What weight did your F-20 come out at?.
Did you end up finding a Dynamax for it?
I am getting to the end with mine,the cockpit is just about finished, I will post a couple of photos after I glue the canopy on. (painful job).
Missing New York, I will be coming back for another holiday in the future and this time i will have to bring the other half.
Regards
Brucem
02-04-2003, 05:49 AM
#31
Cressline F-20?
I apologize for being so remiss in correspondence, work and the holidays kept me running, and I just got behind! Plus, I want to send you a care package, too. I guess most Australians are not in a big hurry, usually, anyway!
I have not weighed the sucker. I did get a Dynamax...after hearing all the opinions above, I could not see the point of cheaping out and using the Turbax III/82 I had lying around. I found I had a pipe laying around anyway for a 91, and I have a pair of new 91's winging their way to me from Waigo in Hong Kong, only $250 each. One is going into a byron A4, the other in this.
YOUR F-20 is infinitely more work than this...I sort of whipped this one out, just out of boredom!
That F111 you were talking about came up for sale here in the USA, replete with the 6" tractor fan unit like your F-15, but the price was way out of my league.
Let me know when you are coming back, you can meet MY other half(she's great) and Baby Kit, my daughter....
Alll the best,
Curtis
I have not weighed the sucker. I did get a Dynamax...after hearing all the opinions above, I could not see the point of cheaping out and using the Turbax III/82 I had lying around. I found I had a pipe laying around anyway for a 91, and I have a pair of new 91's winging their way to me from Waigo in Hong Kong, only $250 each. One is going into a byron A4, the other in this.
YOUR F-20 is infinitely more work than this...I sort of whipped this one out, just out of boredom!
That F111 you were talking about came up for sale here in the USA, replete with the 6" tractor fan unit like your F-15, but the price was way out of my league.
Let me know when you are coming back, you can meet MY other half(she's great) and Baby Kit, my daughter....
Alll the best,
Curtis
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flyncrazy (08-19-2021)
02-04-2003, 11:09 AM
#32
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Cressline F-20?
G'day Curtis,
Are you still interested in an F-111?. I heard a rumour that there is one for sale here. The guy has built it but not yet flown but is a sister ship to the one that ended up in the USA. The 6" fan unit in the F-111 that is in the USA is a hand moulded carbon fibre unit whereas the fan unit's in my F-15 are 6"tractor Hurricane Fans.
Would you like my to do some enquires about the one for sale for you?.
Regards
Bruce
P.S. Excellent Price for the OS91's!!!.
Are you still interested in an F-111?. I heard a rumour that there is one for sale here. The guy has built it but not yet flown but is a sister ship to the one that ended up in the USA. The 6" fan unit in the F-111 that is in the USA is a hand moulded carbon fibre unit whereas the fan unit's in my F-15 are 6"tractor Hurricane Fans.
Would you like my to do some enquires about the one for sale for you?.
Regards
Bruce
P.S. Excellent Price for the OS91's!!!.
02-04-2003, 03:21 PM
#33
Cressline F-20
I built and flew a Cressline F-20 years ago with OS77 and
a Dynamax no cheater hole. It flew fine, nice presents in the air.
I think the plane was designed by Gary Mueller @ Jet Tech. I
remember the kit came with a video of Gary building and flying
it.
The stab was full flying and was not the greatest design. I soon
abandoned this and just cut elevators in the surfaces.
W.G.Hunter
a Dynamax no cheater hole. It flew fine, nice presents in the air.
I think the plane was designed by Gary Mueller @ Jet Tech. I
remember the kit came with a video of Gary building and flying
it.
The stab was full flying and was not the greatest design. I soon
abandoned this and just cut elevators in the surfaces.
W.G.Hunter
02-04-2003, 09:07 PM
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Cressline F-20?
Gentlemen,
Yes, I did find the video, it did not include building but of flying the F-20. It also included the Saab Viggen.
I wanted to try and fly without the cheater hole installed first as its looks better, but if I needed to cut a hole so be it. The stab was also a gray area. My first attempt came out with the stab being level, with no anhedral (sp?). Yes, I did use the angled blocks but the entire full-flying stab assembly seems only gassed to the bottom of the fuselage. Any words of advice on this set-up without going with separate elevators?
Thanks again, Glenn
Yes, I did find the video, it did not include building but of flying the F-20. It also included the Saab Viggen.
I wanted to try and fly without the cheater hole installed first as its looks better, but if I needed to cut a hole so be it. The stab was also a gray area. My first attempt came out with the stab being level, with no anhedral (sp?). Yes, I did use the angled blocks but the entire full-flying stab assembly seems only gassed to the bottom of the fuselage. Any words of advice on this set-up without going with separate elevators?
Thanks again, Glenn
02-04-2003, 10:08 PM
#37
Cressline F-20
I remember the flying stabs being extremely sensitive to input.
The first flight was a nightmare because it had way too much throw... although it looked right on the ground.
If I remember correctly, the servo for the FS was mounted
in the nose and had nyrod running all the way to the rear! I think
it only called for one 60oz servo to drive the whole thing! Mid 80's
technology! They never fluttered but always felt like they were
about to fall off.
I removed all the hardware, installed a plywood spar and epoxied
them to the fuse, Added one servo for each side in the rear and
cut in elevators about 2" wide. It flew nicely at a little over 100mph. I think the outlet (diameter) was a little large for the Dynamax fan and top speed suffered.
W.G. Hunter
The first flight was a nightmare because it had way too much throw... although it looked right on the ground.
If I remember correctly, the servo for the FS was mounted
in the nose and had nyrod running all the way to the rear! I think
it only called for one 60oz servo to drive the whole thing! Mid 80's
technology! They never fluttered but always felt like they were
about to fall off.
I removed all the hardware, installed a plywood spar and epoxied
them to the fuse, Added one servo for each side in the rear and
cut in elevators about 2" wide. It flew nicely at a little over 100mph. I think the outlet (diameter) was a little large for the Dynamax fan and top speed suffered.
W.G. Hunter
02-10-2003, 04:36 PM
#38
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KOTA Tigershark
I picked up an old KOTA F-20 from a fellow and it was in a very sad state. I have been refinishing it and now have to work out a few of the internals. It has leading and trailing edge flaps.
Wish I had the original Gear struts to go with the kit though. Does anyone have templates of the wood formers?
I know it may never fly, but she certainly is pretty to hang in the shop. It was orignially done with with a byron fan, but I have a Dynamax/KB.82 sitting here, so.....
Photos..
http://www.wordmark.ca/doc/tshark/FrameSet.htm
http://www.wordmark.ca/doc/fleet/
Wish I had the original Gear struts to go with the kit though. Does anyone have templates of the wood formers?
I know it may never fly, but she certainly is pretty to hang in the shop. It was orignially done with with a byron fan, but I have a Dynamax/KB.82 sitting here, so.....
Photos..
http://www.wordmark.ca/doc/tshark/FrameSet.htm
http://www.wordmark.ca/doc/fleet/
02-11-2003, 10:41 AM
#39
Cressline F-20?
Hi Jay/fellas
re post #23 I have done a lot of work on the model since my last post i have built new wings from light ply and balsa skinning around a 1inch carbon tube which serves as main spar and wing joiner these will be glassed and painted. i'm using bvm t33 main u/c and home made oleo legs,the nose is springair with home made leg, i have mounted the tail on a 3/8inch carbon rod running in two ball races, i am worrying a bit about how much movement to use tho? i will be fitting a p120 i'm thinking the model will be about 18lbs+ if it ever stops raining i'll post some pics
M
re post #23 I have done a lot of work on the model since my last post i have built new wings from light ply and balsa skinning around a 1inch carbon tube which serves as main spar and wing joiner these will be glassed and painted. i'm using bvm t33 main u/c and home made oleo legs,the nose is springair with home made leg, i have mounted the tail on a 3/8inch carbon rod running in two ball races, i am worrying a bit about how much movement to use tho? i will be fitting a p120 i'm thinking the model will be about 18lbs+ if it ever stops raining i'll post some pics
M
02-11-2003, 01:30 PM
#42
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TShark
Looks good Mick! Nice and light wings. I need to make some gear for my Shark. Can you post some pics of yours and maybe some details? Do you sell them?
I'd also like to see your placement of the wheel wells on the underside of the plane. On the Tigershark I have, the wheel wells are cut into the bottom of the fuselage and not just the wings. This would require extremely long gear legs. I know the guy had been flying it with the gear fixed down, so I wonder if he cut the hole inboard to be used as cheater holes for the byron fan.
I will provide pics if you need clarification.
I'd also like to see your placement of the wheel wells on the underside of the plane. On the Tigershark I have, the wheel wells are cut into the bottom of the fuselage and not just the wings. This would require extremely long gear legs. I know the guy had been flying it with the gear fixed down, so I wonder if he cut the hole inboard to be used as cheater holes for the byron fan.
I will provide pics if you need clarification.
02-11-2003, 04:20 PM
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TShark Gear
This certainly looks much better than mine...
I know the KOTA Tigershark came with oleo struts, but i couldn't see then extending this far at full length. Words from any other KOTA owners?
I know the KOTA Tigershark came with oleo struts, but i couldn't see then extending this far at full length. Words from any other KOTA owners?
02-11-2003, 05:29 PM
#45
Cressline F-20?
I believe a byron fan would need cheater holes looking at the intake size, i don't know what to say about your r/c, perhaps you could install ply plates in the foam and recut the wheel wells in the wing is the wing fixed what size is the model?
M
M
02-11-2003, 09:30 PM
#46
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Cressline F-20?
Hi Jay,
I have a KOTA F-20 which we remoulded to fix a couple of the problems that we found with the original Fuse. We have flown one with a Ramtec/OS91 and this went well , once we sorted out the C of G. The original wings did not produce the flight characteristics we wanted so we made another 2 sets before we had it flying the way it should. It was mainly airfoil sections that we changed and I am in the finishing stages of one that will be powered by a SimJet2300. The original wings we used did not have the leading edge flaps so I cannot comment on that. I have just updated my computer and have not loaded all the photos as yet. Is there any thing in particular that you would like to know?.
For the retracts, I used Robart retracts and 1/2" oleos. Worked well.
Regards
Brucem
I have a KOTA F-20 which we remoulded to fix a couple of the problems that we found with the original Fuse. We have flown one with a Ramtec/OS91 and this went well , once we sorted out the C of G. The original wings did not produce the flight characteristics we wanted so we made another 2 sets before we had it flying the way it should. It was mainly airfoil sections that we changed and I am in the finishing stages of one that will be powered by a SimJet2300. The original wings we used did not have the leading edge flaps so I cannot comment on that. I have just updated my computer and have not loaded all the photos as yet. Is there any thing in particular that you would like to know?.
For the retracts, I used Robart retracts and 1/2" oleos. Worked well.
Regards
Brucem
02-11-2003, 09:57 PM
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Cressline F-20?
Mick..
The wings are fixed and the plane is 92 inches long. 1/6 scale I believe. I drove from Boston to London, Ontario with the monster strapped to the roof of my Mitsubishi Eclipse. I quote the border Guard:"WOW!! Strap on rockets!" I hope to rework the ducting for a dynamax fan.
Bruce..
If you could provide photos of the underside of the Kota Shark, I need to see the retract holes. I also need to reinstall some of the fuse formers, so if you have templates...
The wings are fixed and the plane is 92 inches long. 1/6 scale I believe. I drove from Boston to London, Ontario with the monster strapped to the roof of my Mitsubishi Eclipse. I quote the border Guard:"WOW!! Strap on rockets!" I hope to rework the ducting for a dynamax fan.
Bruce..
If you could provide photos of the underside of the Kota Shark, I need to see the retract holes. I also need to reinstall some of the fuse formers, so if you have templates...
02-23-2003, 03:07 AM
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Cressline F-20?
Hello Jay,
Better late than never, Here are the shots from the underside of my F-20, When we re-did the moulds the Speed brake and Wheel wells were moulded in. This made the job of making these very easy. Pawel Sagaidak was the person who did the moulding work and did a great job considering the condition of the original KOTA Fuse.
Curtis,
I will also attach photos of the cockpit that I have just finished for it.
Regards
Bruce
Better late than never, Here are the shots from the underside of my F-20, When we re-did the moulds the Speed brake and Wheel wells were moulded in. This made the job of making these very easy. Pawel Sagaidak was the person who did the moulding work and did a great job considering the condition of the original KOTA Fuse.
Curtis,
I will also attach photos of the cockpit that I have just finished for it.
Regards
Bruce