Need your Help

Could some one check your Flight Streak Plans and see where the CG is? And I need to know how far from the leading edge.
AND do you think it's the same as the ARF?
Scott( club member needs to know) Riese

>Could some one check your Flight Streak Plans and see where
>the CG is? And I need to know how far from the leading edge.
>AND do you think it's the same as the ARF?
>Scott( club member needs to know) Riese

Scott,
The plans I have are Pats Models version of the "GMA 57 F.S." and they claim to be approved by Tom Dixon. It shows an approximate CG at 2.25 inches from the leading edge. I believe Elwyn compared the CG of his F.S. ARF with a scratch built one and while I can't recall what they measured, I know they were different.

My rule of thumb was that the airplane would be slightly nose heavy when you balanced it on the spar.

My kit plans from the original Top Flight kit show the CG exactly down the center of the spar.

Cy.

The original George Aldrich plans show the CG at the rear of the leading edge spar, @ 1 inch back from the front of the wing. The Brodak plans are an accurate reproduction of the original plans. I have George's Proof copies of the Brodak plans for the full size and Jr. streaks. I have examined a copy of his original plans signed by George. I have also seen a copy of his original plans which shows a CG furthur back. This CG has been partially erased and a note in George's hand says "wrong". These plans also show the CG in the proper forward position. The Top Flite kit plans do show the CG over the spar. Various people will say they like the CG here, there, and yonder, and that is fine. I'm just saying how it was according to George.

Incidentally, the CG on the Brodak Jr. Flitestreak is a bit furthur back. (Plans out in the shop, so I'm not going to go measure.) maybe half way to the spar. I balanced my Jr Flitestreak 3/8 forward if the plan CG position and it flew to suit me.

>
>My rule of thumb was that the airplane would be slightly
>nose heavy when you balanced it on the spar.
>
>My kit plans from the original Top Flight kit show the CG
>exactly down the center of the spar.
>
>Cy.

No help I need numbers

LAST EDITED ON Dec-11-03 AT 09:28 PM (CST)
 

>No help I need numbers

Scott,

The center of the spar is 2-3/4 inches from the wing's leading edge on the Top Flite kit.

SUPER!!!

>>My kit plans from the original Top Flight kit show the CG
>>exactly down the center of the spar.
>>
>>Cy.
>
>No help I need numbers

I've got a set of plans blown up 200% from the 50% reduction from full sized as delivered with the kit.

The measured distance on the plans is 2 11/16 of an inch.

Cy.

>
>The measured distance on the plans is 2 11/16 of an inch.

Cy,

The measured distance on my plans is also 2-11/16, but this is in the side view. On the plan view it measures 2-3/4. My as-built wing also measures 2-3/4.

Scott,

Have you searched SSWF. I think that there was a lot of input on this topic on SSWF and Flightlines. You might want to check these.

SK

Scott,

If you're fixin' to fly Stunt with it, my ARF FS balances at 1.9 inches from LE. I'll be trying a further forward balance point, but so far this works well.

If instead you're just out showing off, in my carefully considered opinion the balance point ought be equidistant from LE and TE. That is what Howard would call the "sporty" balance point and I want to be there for the first/last flight as you are a known wuss who can't possibly deal with a fully aerobatic Flite Streak, will slink off to fly Bi-slobs.

If instead you're just out showing off, in my carefully considered opinion the balance point ought be equidistant from LE and TE. That is what Howard would call the "sporty" balance point and I want to be there for the first/last flight as you are a known wuss who can't possibly deal with a fully aerobatic Flite Streak, will slink off to fly Bi-slobs.

Dan
If instead you're just out showing off, in my carefully considered opinion the balance point ought be equidistant from LE and TE. That is what Howard would call the "sporty" balance point and I want to be there for the first/last flight as you are a known wuss who can't possibly deal with a fully aerobatic Flite Streak, will slink off to fly Bi-slobs.

Dan

Dear Dan,

You didn't read the opening post did you? If my memory serves me right I was asking for a club member. As fir flying the Flite Streak it’s a good plane fully aerobatic. HOWEVER, The Bi-Slob will out do any Streak any time and any where.
So now that I’m a WUSS and possibly can’t understand normal thinking I’ll leave it alone until April at or contest.

Scott (Just you see)Riese

PS the flounder is ready to go

LAST EDITED ON Dec-12-03 AT 04:37 PM (CST)
 

>If instead you're just out showing off, in my carefully
>considered opinion the balance point ought be equidistant
>from LE and TE. That is what Howard would call the "sporty"
>balance point and I want to be there for the first/last
>flight as you are a known wuss who can't possibly deal with
>a fully aerobatic Flite Streak, will slink off to fly
>Bi-slobs.
>
>Dan
>
>Dear Dan,
>
>You didn't read the opening post did you? If my memory
>serves me right I was asking for a club member. As fir
>flying the Flite Streak it’s a good plane fully aerobatic.
>HOWEVER, The Bi-Slob will out do any Streak any time and any
>where.
>So now that I’m a WUSS and possibly can’t understand normal
>thinking I’ll leave it alone until April at or contest.
>
>Scott (Just you see)Riese
>
>PS the flounder is ready to go

Scott,

It hurts my brain to read your posts carefully; in scanning through to get the general idea I appear to have missed a detail or two. You have no idea how hurt I am by your stinging rebuke.

Having actually flown my ARF Flite Streak in competition, I have a fair idea concerning what kind of score I can gain with this model.

Are you challenging me to a shoot-out? If so, you're on, because amusing as the Bi-Slobs might be, they are two-trick animals and it takes a lot more than two tricks to do well.

Stunt? Racing? Speed? Combat? Yeah, that's the ticket, we'll fly Combat. You can even use your ST60-powered beast.

Two men enter, one man leaves...

Tell Leo Hi! for me.

Dan

P.S. Scott, I scrolled forward to check on your veracity. The comment to which you refer is stuck between your first and last name! Do you really expect me to read your byline in order to flesh out the main message?

Dan (I'll start right now, as in today, reading Scott's byline carefully, as he likes to slip pertinent information in there sometimes and I miss it completely, allowing him to make me look quite the fool, not the hardest of tasks in the first place, but I digress) Rutherford

Don't sweat it. Start somewhat nose heavy. It'll react smoothly, stunt better, give you a chance to shape the figures. Further back makes responses more sudden and jumpy unless you've got a practiced hand. My Brodak Streak has an FP35 in the nose with a stock muffler. A lot of engine and weight. The response is precise for a Streak, club members commented on how predictable and stable. When I feel like it, I'll chop the nose weight by gong to a tongue. You might want to start off the same way. Run the Streak with a stock muffler for a while until you get the feel. If you want to dance later, reduce nose weight by going to a tongue muffler. Somewhere (probably on this list serve) I read that George had a similar thought and felt the flyer could tune the plane the way he preferred. Adjusting the cg accordingly.

Flight Streak verses Bi-Slob, cool... Can we expect to see this spectacle at Brodaks next summer?????

Bob,
You are a real "promoter/instigator".
Look out Don King, you have competition.
Roger

LAST EDITED ON Dec-12-03 AT 08:35 PM (CST)
 
Scott...I hav a seet of plens of the Brodak Flyte Streke, 'cept 125%. I just mezured tha lotation of teh GC at 1.25" beehind thy pointy part of tha Le. Steve (You do the math) Helmick

Have an APS "Peacemaker" plan, as far as I know this the same model as the "Flitestreak" and the CofG is 1 3/4" behind the leading edge.

jonuck

>Could some one check your Flight Streak Plans and see where
>the CG is? And I need to know how far from the leading edge.
>AND do you think it's the same as the ARF?
>Scott( club member needs to know) Riese

Scott,

I just noticed that you asked two questions in your original post, but only one has been answererd. The first had numerous answers but if you meant the Top Flite plan the CG is 2-3/4 inches from the leading edge. Regarding the second question, the instruction book with my ARF Flite Streak specifies the CG farther aft at 3-1/4 inches from the leading edge.

ROMAN
You get an extra cookie in your lunch. You’re the ONLY ONE TO ANSWER THE QUESTION!

If people would read the question first, and then answer with a simple post, this world would be green all over.

Thanks……two day’s late

Scott

LAST EDITED ON Dec-13-03 AT 11:15 PM (CST)
 
So, I haven't opened my ARF FS yet. But I went to the Swap Meet today, and talking to Scott Creiton, he told me that not only does he have a stock ARF FS flying, but has two FS's built from TF kits. The ARF FS has about a 2" longer TMA! Did you know that? It would allow the CG to be shifted back some. We think it was done to aid in balancing with heavy mufflers, actually. Steve (Got that?) Helmick

WHAT THE HELL IS..... TMA......Speak english 101 please.

scott(not up on lingo)Riese

PS how was john halls

LAST EDITED ON Dec-14-03 AT 06:53 PM (CST)
 
Tail Moment Arm. Very standard abbreviation. You must have forgotten, no big deal. GL & GF, ROFLMAO! Steve (gotta help Scott) Helmick

PS: Lots of wonderful stuff. A bunch of old ST's, Foxes, etc. A NIB OS .40FP, TT .25GP, Webra .60, CS's, TF Flite Streak kit ($35 call Dave G.), assorted Webras, CS, a Salter "Foam Peacemaker", etc. DG showed me his Rustler Oly Cub...sweet! There was one of those Cox plastic Cobra autogiros, in pretty good shape...Darkow. Old magazines back to early '50's, MAN, Aero Modeller, Model Builder. Didn't see ANY FM's. I bought two Bob Hunt Video's, VSC 8 & 9...$10 ea. These are much better produced than other vid's I've seen...less panning of the camera following the airplanes in flight, nicely edited, and highly recommended. Kinda cool, seeing Lou Wolgast talking about his Mackey Gobbleswantz, which is in my shop right now. Cool airplane!

For comparison, I watched one Windy video last week, and have another to force myself through. If there's any birds or carp on it, I'm sending it back! Steve

Scott, from Pat Johnston's AutoCad plans for the Flight Streak (as used by Brodak, and authenticated by George himself:

Balance point (NOT CG, necessarily!) scales at exactly 2.25" from the leading edge.......and is noted (approx).

So there you have all the degrees of accuracy you need, along with all the other posts!

When I was in Korea (geez....40 years ago!), I built a stock kit FS with an OS Max III 35 on it. It flew with 'vigor'!...and probably balanced about 1-1/2" back....and flew just fine. There's a bit of latitude here, depending on your perception of 'flying good' and your reaction times!

Dave Gardner;-)

I remember 'vigor'!...he flew with 'gosh that was close'

Thanks Dave

Scott(see it only took 20+ posts)Riese:o

>Scott, from Pat Johnston's AutoCad plans for the Flight
>Streak (as used by Brodak, and authenticated by George
>himself:
>
>Balance point (NOT CG, necessarily!) scales at exactly 2.25"
>from the leading edge.......and is noted (approx).

>Dave Gardner;-)

My 125% Brodak FS plans still show the CG at 1.25" behind the LE of the wing. That would equate to 1" for the standard size. This plan says Brodak, it says designed by George Aldrich, but does not say Pat Johnston on it. It says it was drawn by Dave Braun. Was he the guy that designed the Brodak Sport Racer that was on-off-on? Maybe the 1" CG was just for racers? It doesn't show any range of CG, just there.

Is there a newer plan for the Brodak FS, drawn by Pat? I wonder if Pat or John B. built the Brodak kit prototype and liked the CG at 2.25" aft? GMA was not a combat flier, and it is pretty normal for combat fliers to like the CG aft from where stunt fliers would like it, to reduce the slowing in maneuvers. And then, if the ARF does have approx. 2" longer TMA, then the CG could/should be further aft on it. In the long haul, I trust Dan's 1.9" measurement the most, especially with his announced intention to move the CG forward from there. I think he should get the extra cookie in his lunchbox. Steve

Steve http://www.nwskyraiders.com/index.html