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Multi engine cl
Page 1 of 1
Multi engine cl
Anyone here built one? How does one set it up so one engine does not run out of fuel before the other? Or should the plan be to have the inside engine run a few seconds longer (longer fuel lines from a common tank for example)?
I have flown a Saab 340 for several years and want to model one.... I just don't want the first flight to be the last.
Thanks,
John
I have flown a Saab 340 for several years and want to model one.... I just don't want the first flight to be the last.
Thanks,
John
flyjsh- Gold Member
- Posts : 129
Join date : 2013-03-12
Location : Houston, Texas
Re: Multi engine cl
If you have enough right thrust and rudder you should be able to fly with either engine.
Remember that the majority of C/L flights end when the engine cuts out and you land it safely, this would be no different.
Remember that the majority of C/L flights end when the engine cuts out and you land it safely, this would be no different.
Re: Multi engine cl
I think that's right. The only way to stop both engines simutaniously is to feed them from the same tank.
This one seems to fly on one engine and land perfectly:
https://www.youtube.com/watch?v=hL9LpB8sxMs
Lieven
This one seems to fly on one engine and land perfectly:
https://www.youtube.com/watch?v=hL9LpB8sxMs
Lieven
OVERLORD- Diamond Member
- Posts : 1775
Join date : 2013-03-19
Age : 57
Location : Normandy, France
Re: Multi engine cl
Saab 340 was one of my favorite rides from GRK to DAL years ago when I traveled for the Army Operational Test Command about 25~30 times a year. I hate the box car (super ATR??) they fly now that loads from the rear
Never seen a small balsa model kit or plans for this aircraft so I guess would be a scratch build.
Do you plan control line or make it RC? (edited in...just paid attention to the topic title...Duh!)
I assume you are asking here so Cox powered? If true, there does exist left hand crank shafts for the TD .049/.051
Using TD power you certainly could fit a common fuel tank
In fact using TD.049s you can get fairly well working carburetor from Bernie or Matt and with today's micro RC gear create a realistic flying RC version once you figure scale and weight and wing loading
fredvon4- Top Poster
-
Posts : 4000
Join date : 2011-08-26
Age : 68
Location : Lampasas Texas
Re: Multi engine cl
fredvon4 wrote:
Saab 340 was one of my favorite rides from GRK to DAL years ago when I traveled for the Army Operational Test Command about 25~30 times a year. I hate the box car (super ATR??) they fly now that loads from the rear
Never seen a small balsa model kit or plans for this aircraft so I guess would be a scratch build.
Do you plan control line or make it RC? (edited in...just paid attention to the topic title...Duh!)
I assume you are asking here so Cox powered? If true, there does exist left hand crank shafts for the TD .049/.051
Using TD power you certainly could fit a common fuel tank
In fact using TD.049s you can get fairly well working carburetor from Bernie or Matt and with today's micro RC gear create a realistic flying RC version once you figure scale and weight and wing loading
That pic is the same as the sticker on my flight case! I used to fly IAH-GRK turns all the time. Unfortunately , my company got rid of the Saabs last year The 340 is a tough ol' mule. Nothing like state of the art 1983 technology. Ours were pretty long in the tooth: none had fewer than 40,000 cycles and one had over 50,000!
Yes, it will be CL. I've flown RC, but it just takes up sooo much room. I live in the heart of Houston and all the clubs are out in the 'burbs. Rice University is only a couple miles away and has a nice, unused field plenty big for CL.
The model would start out as a straight legged profile fuse just as a proof of concept (in other words, I'm too chicken to put much time or effort into an experimental twin). Let me bash it up a few times before I get fancy and add retracts
flyjsh- Gold Member
- Posts : 129
Join date : 2013-03-12
Location : Houston, Texas
Re: Multi engine cl
As you know GRK is a nice long runway (built for the B-52s that were originally at the Air Force Base it used to be) with a good prevailing wind from the south. I used to really enjoy the Pilots that would turn base, sneak it down to 10 foot right over the numbers on north end, and fly 6000 feet down the center to lightly touch down smooth as silk at far end near terminal with minimum taxi (light on the brakes and very little reverse thrust) fairly fast up to the jet bridge. Air and ground crew could turn the plane easily inside of 30 minuets.... I miss the old Sabb and the great pilots who flew them...Most of the guys flying the RJ and ATR don't seem to have the same finesse
Profile CL should not be too dificult
Source a Sullivan or similar 1/2a starter from e-bay for about $37
Get two TD .049s one left hand and a few 6x3 props both clockwise and counterclock wise twist
One 1.5oz common fuel tank..Rusty will recommend, and I agree, pressure bladder will work well for distances of fuel line where gravity and centrifical forces will frustrate you with a open fuel cell
Consider hollow log fuselage construction (better area to attach wings and place fuel cell in center
Initial model should be flat bottom, airfoil profile top slab wings around 25" to 31" tip to tip. I would use a 1/2"x 6" x 36" balsa plank to make the wings
Bellcrank will be below due to wing dihedral ...elevator with dihedral will be a challenge but not hard to engineer
Both engines set 0 degree offset. Provide trim tab on rudder for maiden with slight offset to outside
I have a extra Left hand TD crank if you decide to use contra rotating prop engine combo
Profile CL should not be too dificult
Source a Sullivan or similar 1/2a starter from e-bay for about $37
Get two TD .049s one left hand and a few 6x3 props both clockwise and counterclock wise twist
One 1.5oz common fuel tank..Rusty will recommend, and I agree, pressure bladder will work well for distances of fuel line where gravity and centrifical forces will frustrate you with a open fuel cell
Consider hollow log fuselage construction (better area to attach wings and place fuel cell in center
Initial model should be flat bottom, airfoil profile top slab wings around 25" to 31" tip to tip. I would use a 1/2"x 6" x 36" balsa plank to make the wings
Bellcrank will be below due to wing dihedral ...elevator with dihedral will be a challenge but not hard to engineer
Both engines set 0 degree offset. Provide trim tab on rudder for maiden with slight offset to outside
I have a extra Left hand TD crank if you decide to use contra rotating prop engine combo
fredvon4- Top Poster
-
Posts : 4000
Join date : 2011-08-26
Age : 68
Location : Lampasas Texas
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