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Ziroli B-25 help plz! - 7/8/2003 9:45:24 AM   
WarbirdAirRacer


 

Posts: 641
Joined: 12/18/2002
From: Littleton, CO, USA
Status: offline 		I was wondering if anybody thought that a Ziroli B-25 with twin YS 1.40s would fly well ?...... I cant make up my mind about what I want my next airplane to be... its either the Yellow P-40 or a Ziroli B-25 with twin YS 140s or a Yellow P-40 with the twin inline 150R 3W


any thoughts/ideas?

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B-25 - 7/8/2003 11:00:58 AM   
ProfLooney



Posts: 2413
Joined: 1/18/2002
From: Moline, IL, USA
Status: offline 		I am assuming you are meaning his 101" B-25. I dont know much abt your engines but from what I have heard that the g23 it calls for is a little on the lite side for power. So you could prob figure out the cc range your engine puts out and compare it to the g-23 to get a good rough idea. it also depends on how much scale goodies you add to it. the more you add the heavier it will be and the more horses you will need under the hood.

Joe

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B-25 - 7/8/2003 4:54:57 PM   
JeffH


 

Posts: 643
Joined: 1/17/2002
From: Carrollton, VA, USA
Status: offline 		The 101" B-25 flys great on G-23's. If the all up weight gets any higher than 35 pounds you will want a tad more, which the Ys's will provide. The 23's are 1.4 cubic inches and swing 14 inch 3 blades at around 8000-8500, I can't remember exactly. The YS's will turn a bigger prop, no doubt. There is no reason for this plane to ever weigh more than 35 lbs. The one here weighs about 30 and has guns, two pilots, some detail in the nose gunner area , rotating turret, panel lines, armor plates etc. The guys that are hitting 40 lbs with the 101" must be building with lead!!! If you are looking for speed, this is not the plane for you!! It will never be fast, nor should it be.

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B-25 - 7/8/2003 5:02:25 PM   
BobH


 

Posts: 4418
Joined: 4/1/2003
From: Springfield, VA,
Status: offline 		Strega, you planning on racing that P-40??.. The prototype was fitted with a 3W50!.. BobH.

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101" B25 - 7/8/2003 5:09:25 PM   
grbaker



Posts: 2451
Joined: 12/12/2001
From: La Porte (near Houston), TX, USA
Status: offline 		I've seen one flown by a very good pilot with OS 90 4 strokes. I've also seen this same guy fly it with only one of the OSs running.

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Ziroli B-25 help plz! - 7/8/2003 5:24:13 PM   
pittsdriver



Posts: 820
Joined: 2/25/2002
From: Twin Falls, ID, USA
Status: offline 		I have this kit next in line after the Spitfire is done. I am putting two Laser 2.00 v-twins in mine. They fit inside the cowls and will sound like two harley engines pulling it around. Don

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Re: Ziroli B-25 help plz! - 7/8/2003 5:40:08 PM   
branded



Posts: 984
Joined: 7/16/2002
From: cary, IL, USA
Status: offline 		[QUOTE]Originally posted by StregaMustang7
I was wondering if anybody thought that a Ziroli B-25 with twin YS 1.40s would fly well ?...... I cant make up my mind about what I want my next airplane to be... its either the Yellow P-40 or a Ziroli B-25 with twin YS 140s or a Yellow P-40 with the twin inline 150R 3W


any thoughts/ideas? [/QUOTE]

Wow, I'd like to see that too! Fact is, I'm still wanting to see this P40 with a ZDZ 80 on it. I think we're going see/hear of some structural failures in the not too distant future.

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Ziroli B-25 help plz! - 7/8/2003 7:13:20 PM   
warbirdz1


 

Posts: 578
Joined: 8/7/2002
From: Pembroke pines, FL, USA
Status: offline 		John......I have built and flown 2 of the "Z" B-25 101" bombers and there is a wide variety of powerplants capable of having good performance.....Both of mine powered by G-38's.......#1 B-25 was 37+ lbs and #2 is 35+ lbs.....The B-25 can be quite fast when proped for speed......The G-23 will fly it but its only just an adequate powerplant.........wont fly it on one engine.........this plane is "more" than a handful with an engine failure......its a difficult choice between adding some weight and going with more power or being a little lighter with less power......but the most important factor in choosing a powerplant should be reliability.......sadly....I've yet to see one come back after an engine failure...personally witnessed 5-6 with an engine failure ...including B-25 #1( G-23 & G-38)......Not real familiar with YS-140 but should be a good powerplant performance wise......just do all possible to make it reliable......keep us posted on your project...good luck.......Bill.....

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Ziroli B-25 help plz! - 7/8/2003 10:29:34 PM   
F4u5



Posts: 1825
Joined: 1/19/2002
From: Apple Valley, MN, USA
Status: offline 		A guy south of here has one about 9-10 years old...always flies well with the OS 1.20's he has in it.

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Single G-23 flight - 7/8/2003 10:43:05 PM   
JeffH


 

Posts: 643
Joined: 1/17/2002
From: Carrollton, VA, USA
Status: offline 		I beg to differ about a G-23 not being able to fly it on one engine. We lost the right engine just after take off and flew it around the pattern perfectly fine. It was struggling, but it flew maintained and landed. This was in front of a full scale warbird show no less.
It rolled started to roll over, but the the good engine was throttled back to determine what was going on then advanced with the appropriate rudder...no problem!! Just have to know your procedures.

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B-25....... - 7/8/2003 11:19:05 PM   
warbirdz1


 

Posts: 578
Joined: 8/7/2002
From: Pembroke pines, FL, USA
Status: offline 		Jeff......I can only report to others what I've seen thru the years....its good to hear someone finally saved one.......I hate to see anyones plane put back in kit form .......... as you know theres a lot to be said about piloting skills and sometimes all that you do....still isn't good enough.......Doc McCaulley was flying my friends B-25(G-23's and a Gyro).....and as good a pilot as he is after #1 eng quit.....wouldn't come home....had to crash land in the field........Like I said ...its a "Delicate" balance between weight and power...which one is better is hard to say........Thats why reliability is front and center with twin engine warbirds......until one actually experinces an engine failure...its hard to determine an exact course of action..........In my case...the B-25 was upside down in milliseconds...it was a flash............I continued roll back to straight/level...retarded the throttles pushed nose down to increase airspeed and parked it........unfortunately it landed in a rockpile.....even doing all the right things...didn't save it......theres also unknown factors to deal with as well.......its probably a case-by-case situation...each one having its own problems to deal with.........atleast knowing one came back gives hope to the next B-25 that looses an engine....hopefully that one returns home safe as well...........Bill.....

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engine out - 7/9/2003 12:21:31 AM   
JeffH


 

Posts: 643
Joined: 1/17/2002
From: Carrollton, VA, USA
Status: offline 		I didn't mean to insult anyone, just stating that it can be done. Now, it is certainly something that you do not want to do on a regular basis.

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Ziroli B-25 help plz! - 7/9/2003 1:22:08 AM   
WarbirdAirRacer


 

Posts: 641
Joined: 12/18/2002
From: Littleton, CO, USA
Status: offline 		Thanks lot for the great posts guys! keep em coming!!! some great helpful info is coming alive! now to give some feed back

[QUOTE]I am assuming you are meaning his 101" B-25. I dont know much abt your engines but from what I have heard that the g23 it calls for is a little on the lite side for power. So you could prob figure out the cc range your engine puts out and compare it to the g-23 to get a good rough idea. it also depends on how much scale goodies you add to it. the more you add the heavier it will be and the more horses you will need under the hood.

Joe[/QUOTE]

I dont plan on making it a 100% scale but i would like to do guns and what not on it. from what i've seen/fown the YS 140s make great power for something like a twin. also think they would sound **** as a twin having that 4stroke purrrrrrrrr to em

[QUOTE]Strega, you planning on racing that P-40??.. The prototype was fitted with a 3W50!.. BobH.[/QUOTE]

If i go with the P-40 and that inline twin its just for fun. i love speed and i think that would be a hell of a combo seems like im the only one in this city that loves fast warbirds (other then my dad) that is.....

[QUOTE]I have this kit next in line after the Spitfire is done. I am putting two Laser 2.00 v-twins in mine. They fit inside the cowls and will sound like two harley engines pulling it around. Don[/QUOTE]

someone told me about those engines....never seen or heard one before anywhere i can go to see it ?

[QUOTE]A guy south of here has one about 9-10 years old...always flies well with the OS 1.20's he has in it.[/QUOTE]

I believe i've met that guy! dont remember much about his airplane but i do remember he was from NM...

[QUOTE]John......I have built and flown 2 of the "Z" B-25 101" bombers and there is a wide variety of powerplants capable of having good performance.....Both of mine powered by G-38's.......#1 B-25 was 37+ lbs and #2 is 35+ lbs.....The B-25 can be quite fast when proped for speed......The G-23 will fly it but its only just an adequate powerplant.........wont fly it on one engine.........this plane is "more" than a handful with an engine failure......its a difficult choice between adding some weight and going with more power or being a little lighter with less power......but the most important factor in choosing a powerplant should be reliability.......sadly....I've yet to see one come back after an engine failure...personally witnessed 5-6 with an engine failure ...including B-25 #1( G-23 & G-38)......Not real familiar with YS-140 but should be a good powerplant performance wise......just do all possible to make it reliable......keep us posted on your project...good luck.......Bill.....[/QUOTE]

"reliability" is 1 of my biggest reasons for wanting to go with the YS engines! I've had YS's in almost every airplane i have/had and never has one died to being out of tune or anything like that. YS has been very good to me and my friends that fly them also....


anyways if I go ahead and do the B-25 witch more then likely i will do, who should i get my kit cut from ? I did some searching lastnight and found a little info on The Areoplane Works or the Warbird Kit Cutters?!

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Ziroli B-25 help plz! - 7/9/2003 1:29:49 AM   
WarbirdAirRacer


 

Posts: 641
Joined: 12/18/2002
From: Littleton, CO, USA
Status: offline 		I think the key thing to do when an engine dies is kill the running one and land it as safe as possible!

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Tat-Tude 379

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Ziroli B-25 help plz! - 7/9/2003 1:34:19 AM   
pittsdriver



Posts: 820
Joined: 2/25/2002
From: Twin Falls, ID, USA
Status: offline 		John, Go to laserengines.com for info. I have a 3.00 in my Fokker D-7 and never a flameout in over 40 flights. Starts with one or two flips and has an awsome sound. I have a warbird kit cutters kit and it is first class. I also would not hesitate buying an Aeroplane works kit as Mace has an excellent reputation. Don

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