Intruder 90R arrives
#51
Senior Member
My Feedback: (14)
RE: Intruder 90R arrives
ORIGINAL: Free Bird
Crank did a very extensive thread on his 'Tuder builds. Do a search in this forum and it'll popup. I've been flying one that's basically stock and have a lot of fun flying it. I'm using a Saito 91 that's side mounted. Start with the CG on the main gear, it's far too forward as shown in the manual.
FB
Crank did a very extensive thread on his 'Tuder builds. Do a search in this forum and it'll popup. I've been flying one that's basically stock and have a lot of fun flying it. I'm using a Saito 91 that's side mounted. Start with the CG on the main gear, it's far too forward as shown in the manual.
FB
I'm still having a difficult time believing that the Saito .91 doesn't stand up to SPA flying/practice. No one has mentioned to me (or I have forgotten) exactly how the Saito doesn't measure up? Having to adjust the needle valve every day is what you should do with any glow engine, two or four-stroke, so I don't see that as a failure. Even with my big belly. <G>
I've had and still have the Saito .91. Sold my last OS FS-91 SII a while back, but not because I thought they had problems or were bad. They are great engines. I just wanted something lighter in the nose of my 10cc sized classic patternships.
Ed Cregger
#52
RE: Intruder 90R arrives
i watched a .91 powered intruder being taken through the pattern and was very impressed. quiet, smooth and powerful. nothing wrong with a .91 4 stroke on an intruder.
#54
Senior Member
My Feedback: (14)
RE: Intruder 90R arrives
ORIGINAL: dhal22
i watched a .91 powered intruder being taken through the pattern and was very impressed. quiet, smooth and powerful. nothing wrong with a .91 4 stroke on an intruder.
i watched a .91 powered intruder being taken through the pattern and was very impressed. quiet, smooth and powerful. nothing wrong with a .91 4 stroke on an intruder.
I'm not questioning running a .91 four-stroke on the Intruder 90, dhal22. I'm wondering what the failure mode is in the Saito .91 when used for this purpose versus the OS FS-91SII that seems to hold up well.
Some of the SPA flyers that have tried the Saito .91, or have seen someone else try the Saito .91, have implied that the engine wasn't up to the task. Problem is, I haven't seen any detailed info revealing why this is true. I'm not questioning anyone's honesty or judgement. I'm trying to pick some brains for info.
Ed Cregger
#55
My Feedback: (4)
RE: Intruder 90R arrives
The general feeling is that the Saito .91 is not as POWERFUL as the OS. Power seems to be the main concern. It is smaller and lighter, but less powerful, and power means more RPMs, or being able to swing a larger prop. Reliability of the Saito is good, but O.S. is probably best OVERALL when it comes to a combination of reliability, power, reliable needle valve settings etc.
Other engines are fine if you already have them, but most serious SPA competitors will buy the OS unless they are on a budget. In that case the Magnum is often used.
Other engines are fine if you already have them, but most serious SPA competitors will buy the OS unless they are on a budget. In that case the Magnum is often used.
#56
Senior Member
My Feedback: (14)
RE: Intruder 90R arrives
ORIGINAL: kingaltair
The general feeling is that the Saito .91 is not as POWERFUL as the OS. Poer seems to be the main concern. It is smaller and lighter, but less powerful, and power means more RPMs, or being able to swing a larger prop. Reliability of the Saito is good, but O.S. is probably best OVERALL when it comes to a combination of reliability, power, reliable needle valve settings etc.
Other engines are fine if you already have them, but most serious SPA competitors will buy the OS unless they are on a budget. In that case the Magnum is orfen used.
The general feeling is that the Saito .91 is not as POWERFUL as the OS. Poer seems to be the main concern. It is smaller and lighter, but less powerful, and power means more RPMs, or being able to swing a larger prop. Reliability of the Saito is good, but O.S. is probably best OVERALL when it comes to a combination of reliability, power, reliable needle valve settings etc.
Other engines are fine if you already have them, but most serious SPA competitors will buy the OS unless they are on a budget. In that case the Magnum is orfen used.
Not to belabor this line of thought, but what do you mean about needle settings? Is the carb so large/compression so high as to make the engine super sensitive to atmospheric changes? Or are the flyers having this problem unable to physically adjust a needle valve comfortably for whatever reasons? Is the mixture changing during the flight? Or is the carb opening so large (high cfm) that the engine doesn't draw fuel evenly enough to run out a whole tank of fuel with the original needle valve setting. Can you understand what I'm saying? I might not be phrasing it well.
To me, the slight reduction in power of the Saito .91 would be more than offset by the serious reduction in weight and the fact that the airframe that is designed for a 10cc two-stroke, will probably require less modification in order to balance properly with the lighter Saito engine.
I'm not going to ridicule anyone for their opinions or their preferences. I'm just curious as to why the OS is preferred over the Saito. I have both engines and the Magnum as well, so I don't have a favorite horse in this race.
Thanks for jumping into the conversation. I can't think of anyone more qualified to offer a valid opinion on this topic.
I'll be extremely lucky if I ever make it to an SPA contest, but I am interested in the organization, the models/engines and the other people interested in the SPA and the BPA - assuming it is still in existence.
Ed Cregger
#60
RE: Intruder 90R arrives
i meant no harm whatsoever. you guys know tons more about the actual flying part of this forum. i just was impressed by the .91's smooth power. of course the pilot made a big difference.
#61
My Feedback: (4)
RE: Intruder 90R arrives
ORIGINAL: N2ECW
Not to belabor this line of thought, but what do you mean about needle settings? Is the carb so large/compression so high as to make the engine super sensitive to atmospheric changes? Or are the flyers having this problem unable to physically adjust a needle valve comfortably for whatever reasons?
Thanks for jumping into the conversation. I can't think of anyone more qualified to offer a valid opinion on this topic.
I'll be extremely lucky if I ever make it to an SPA contest, but I am interested in the organization, the models/engines and the other people interested in the SPA and the BPA - assuming it is still in existence.
Ed Cregger
Not to belabor this line of thought, but what do you mean about needle settings? Is the carb so large/compression so high as to make the engine super sensitive to atmospheric changes? Or are the flyers having this problem unable to physically adjust a needle valve comfortably for whatever reasons?
Thanks for jumping into the conversation. I can't think of anyone more qualified to offer a valid opinion on this topic.
I'll be extremely lucky if I ever make it to an SPA contest, but I am interested in the organization, the models/engines and the other people interested in the SPA and the BPA - assuming it is still in existence.
Ed Cregger
Edwhether to compete or just watch, I hope you will come out to a meet this season, ad when you do, please introduce yourself..I'd like to meet you. There are two meets in Atlanta this season...one for "Antique Class" in June, and another later, (can't remember when).
BTW-Miss "froggy"
Duane
#62
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Join Date: Apr 2008
Location: Englewood,
CO
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RE: Intruder 90R arrives
Fedex delivered mine today and I am thouroughy impressed! This is probably the nicest ARF I've ever purchased. I've hard ARF's with pre-hinged/glued control surfaces before but never with metal hinges! Nice touch. Great hardware set as well and having all of the spots for the horn mounts marked out is a big plus to me.
The covering looks great with VERY little wrinkles but just in the little work I've done thus far I can see that this stuff will come loose very easily. But this is the only downfall I can see for now.
I've become a bit tired of putting ARF's together lately but I think I may actually enjoy building this one. It's going to be a breeze!
Just to be sure that I don't have an updated manual or anything, the stated CG is 156mm (6.14in) behind the wings LE. Is this still incorrect? And do they mean at the fuse or at the wings tip?
Hoping to maiden this weekend.
The covering looks great with VERY little wrinkles but just in the little work I've done thus far I can see that this stuff will come loose very easily. But this is the only downfall I can see for now.
I've become a bit tired of putting ARF's together lately but I think I may actually enjoy building this one. It's going to be a breeze!
Just to be sure that I don't have an updated manual or anything, the stated CG is 156mm (6.14in) behind the wings LE. Is this still incorrect? And do they mean at the fuse or at the wings tip?
Hoping to maiden this weekend.
#69
My Feedback: (15)
RE: Intruder 90R arrives
Mike - Did you fly pattern back in the early 70's, with Hal Parenti and Jimmy Grier ? Your name is very familiar. Jimmy always mounted his Super Tigre's inverted, plane colors, green and black. Parenti, had a big 1971 or 72 Olds 98, 4 door, light blue color. He would pull his pattern planes out of the back seat or trunk, they were painted the same color as his Olds. I am thinking I had seen your name on the points board. Dave Brown was in that group, Norm Page, etc.
Vince
Vince
#70
My Feedback: (41)
RE: Intruder 90R arrives
Yes Vince I was a big part of the Chicago pattern scene in the late 60's into the early 80's.
Now I've been back for 9 seasons and I'm actually flying better than I ever had in my life. So I've found if your relativly healthy and have good eyesite that you can still be competitive in pattern.
http://www.rcuniverse.com/forum/m_8666129/tm.htm
Here's some old pictures.
Yes I know Hal he's still very active in RC but not pattern. Jimmy Grier was a close friend. We're you a Chicago flyer? We had a great group. Guys like Jerry Worth, Norm, Don Weirhiem, Fritz, Bill Richards, Bart Fury, Jimmy, Hal, Elmer Helfert, Gary Leonard, Bill Johnson, Man we had it going on. Mike Mueller
I have a boat load of old pics that I will be posting soon.
Now I've been back for 9 seasons and I'm actually flying better than I ever had in my life. So I've found if your relativly healthy and have good eyesite that you can still be competitive in pattern.
http://www.rcuniverse.com/forum/m_8666129/tm.htm
Here's some old pictures.
Yes I know Hal he's still very active in RC but not pattern. Jimmy Grier was a close friend. We're you a Chicago flyer? We had a great group. Guys like Jerry Worth, Norm, Don Weirhiem, Fritz, Bill Richards, Bart Fury, Jimmy, Hal, Elmer Helfert, Gary Leonard, Bill Johnson, Man we had it going on. Mike Mueller
I have a boat load of old pics that I will be posting soon.
#71
Senior Member
My Feedback: (14)
RE: Intruder 90R arrives
ORIGINAL: mups53
Here's some old pics of Jim Kirkland and the original Intruder. I think it's from the 1970 Nats Glenview Illinois. He took first. Mike Mueller
Here's some old pics of Jim Kirkland and the original Intruder. I think it's from the 1970 Nats Glenview Illinois. He took first. Mike Mueller
Jim Kirkland was as close to being a hero as there was in my life. I was one unhappy puppy when Jim passed on. He was my personal pattern mentor in those days, as far as I was concerned.
Does anyone know how old Jim was when he passed on? TIA
Ed Cregger
#72
My Feedback: (17)
RE: Intruder 90R arrives
ORIGINAL: mups53
Here's some old pics of Jim Kirkland and the original Intruder. I think it's from the 1970 Nats Glenview Illinois. He took first. Mike Mueller
Here's some old pics of Jim Kirkland and the original Intruder. I think it's from the 1970 Nats Glenview Illinois. He took first. Mike Mueller
The Intruder is still available in kit form from Carolina Custom Aircraft.It is a faithful reproduction of Jim’s original design with the proper wing, wing placement and all dimensions so it flies just like Jim wanted it too.A real classic.
#75
My Feedback: (41)
RE: Intruder 90R arrives
ORIGINAL: RFJ
He was 48 (1924 - 1972) Died of a heart attack way too young.
Ray
Does anyone know how old Jim was when he passed on?
Ray
I've always loved the look of the Intruder. I think the Compensator is just another version of it and since JK was Rhett's mentor I'm sure that's what it is.
That was the golden age of pattern and it's amazing the hold that the south had on it with Ron Chidgey, Rhett, Jim Whitley, Doc Edwards, and Don Coleman. It was a huge accomplishment when Norm Page and Jim Martin went to the 72 Masters and broke their dominant run. Mike