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RE: New Hangar 9 B-25 - 10/6/2007 9:07:55 PM   
John Redman


 

Posts: 1068
Joined: 1/1/2002
From: Mahomet, IL, USA
Status: offline 		A couple of Saito .56's would be more than enough power for the model. The .72's would be extreme overkill!!!

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John Redman; Team JR, BVM Rep, JetCat USA Rep, Horizon Hobby/E-flite Product Developer/Manager

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RE: New Hangar 9 B-25 - 10/7/2007 5:05:41 AM   
LDM


 

Posts: 4960
Joined: 5/29/2003
From: Denver, PA,
Status: offline 		At $369 that is a great deal , ok Santa /Wifey are you listening ?? Looks like a trip to the jewelry store is needed , the bartering is about to begin

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LDM

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RE: New Hangar 9 B-25 - 10/7/2007 6:05:55 AM   
kahloq



Posts: 1698
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: John Redman

A couple of Saito .56's would be more than enough power for the model. The .72's would be extreme overkill!!!


Although it may seem overkill when both motors are running, the purpose is in case of an engine out, one motor can fly the plane with rudder input. Theres no way a saito 56 would carry a 13.5 - 15 pound plane on its own. I highly doubt the evo .36 2 strokes would fair much better then a saito 56 relative to the weight with only one motor running.

(in reply to John Redman)
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RE: New Hangar 9 B-25 - 10/7/2007 12:48:57 PM   
LDM


 

Posts: 4960
Joined: 5/29/2003
From: Denver, PA,
Status: offline 		if the engine goes out why not kill the other one and glide the baby in , after all you have a big crew on board to fly that thing

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RE: New Hangar 9 B-25 - 10/7/2007 2:30:28 PM   
John Redman


 

Posts: 1068
Joined: 1/1/2002
From: Mahomet, IL, USA
Status: offline 		The Saito or Evo would carry the bird arond to get it on the ground. You would be surprised how well you could maintain altitude with either the .56. or .36 running if you were down to one enigne.

Twins are heavy enough to start with. Bigger motors equals more weight which in turn will eat you upif a motor quits. Flown too many twins in my day to want a bigger motor just because one might quit. Get the motors set right and you will be fine. People woory way to much about syncing motors on twins and such. Not necessary, set the rpm with the needle and adjust the top end rpms with travel adjust.

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       Post #: 130

RE: New Hangar 9 B-25 - 10/7/2007 4:46:29 PM   
kahloq



Posts: 1698
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline 		Yes bigger motors equals more weight, but in the case of a saito 56 compared to a saito 72, its only 1.5oz difference, but the available power is dramatically different. Having too much power is not a problem, having not enough is, but, with a high power motor, the yaw might overtake the rudders ability to compensate on one motor.

Now as far as not worrying about an engine out, well, yes, get the engines running rock solid before flying. But, with twins, an engine out is not a matter of IF, but when it will happen.

(in reply to John Redman)
       Post #: 131

RE: New Hangar 9 B-25 - 10/7/2007 8:43:17 PM   
CorsairJock



Posts: 1879
Joined: 4/14/2002
From: Parchment, MI, USA
Status: online 		OK how about this for the 'it needs more power' crowd (which certainly does NOT include me):
Saito has introduced a new engine: the .62 which as I understand it has the same dimensions and weight as the .56. Problem solved?

BTW: my wife has offered to get me this ARF for X-mas (ARF only, I would have to supply retracts and the rest). I'm thinking real hard about it, especially since I've done a little reseach and realized that a Dolittle Raider could be made from this with very little effort. Leave off the side turrents, the side mounted guns, and the tail gunner canopy,then move the top turrent aft and that pretty well convets it to a B-25B as flown by the raiders.

As for power: altho I am an avid electric flyer and even have a pair of AXIs and speed controllers that would probably work: I would really like to hear a pair of 4 strokes on it. I already have 1 NIB Saito .56, so it would be a matter of picking up a second one.

I would also attempt to lighten it up: maybe having a completed wieght of 12 lbs. Most of the H-9 motor mounts are heavy (metal), and I usually replace them with lighter, composite ones. There are some pretty strong servos available now that are about 1 oz, and affordable as well ($20 or less). Here and there, I am hoping I can shave a pound or more off.

If an engine quits on me: I plan on landing ASAP, even if its with the wheels up in a hayfield. I have seen way too many twins spin in and crash after loosing an engine. Not having enough power was the least of their problems, in fact: having too much on the good engine may have contributed to the crashes.

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< Message edited by CorsairJock -- 10/7/2007 8:49:33 PM >

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RE: New Hangar 9 B-25 - 10/7/2007 11:08:26 PM   
Corsair 29


 

Posts: 56
Joined: 10/8/2006
From: Selma, AL, USA
Status: offline 		Excellent choice on the "Bat", and the testimony that Cpl Jacob DeShazer gives is incredible!!

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RE: New Hangar 9 B-25 - 10/7/2007 11:35:36 PM   
CorsairJock



Posts: 1879
Joined: 4/14/2002
From: Parchment, MI, USA
Status: online 		Uh actually: I decided not to do "Bat", nor even "Ruptured Duck". Fact is: I found out after the previous post that a Kalamazoo native was co-pilot of the number 14 raider (14th to 'launch' from the Hornet).
Unfortunately, he passed away just a few months ago (June, 2007).

As Kalamazoo (MI) is my home town also, I decided that his plane will be my model, which will have the number "02297". The co-pilot's name: Lt. Jack A. Sims

http://www.doolittleraid.com/crews.htm##14

http://www.freerepublic.com/focus/f-news/1849578/posts

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RE: New Hangar 9 B-25 - 10/8/2007 12:24:46 AM   
kahloq



Posts: 1698
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline
quote:

ORIGINAL: CorsairJock

OK how about this for the 'it needs more power' crowd (which certainly does NOT include me):
Saito has introduced a new engine: the .62 which as I understand it has the same dimensions and weight as the .56. Problem solved?

BTW: my wife has offered to get me this ARF for X-mas (ARF only, I would have to supply retracts and the rest). I'm thinking real hard about it, especially since I've done a little reseach and realized that a Dolittle Raider could be made from this with very little effort. Leave off the side turrents, the side mounted guns, and the tail gunner canopy,then move the top turrent aft and that pretty well convets it to a B-25B as flown by the raiders.

As for power: altho I am an avid electric flyer and even have a pair of AXIs and speed controllers that would probably work: I would really like to hear a pair of 4 strokes on it. I already have 1 NIB Saito .56, so it would be a matter of picking up a second one.



Since the wife said she would get you one...well.. hot damn, better do it before she changes her mind
Two operational saito .56s will fly the plane scale. So dont worry about it. The .62 is not much difference in power so its pointless to put them in unless someone already had them on hand as compared to the 56.
The reason for the larger motor, such as a siato 72, aside from the ability to fly the plane and set up for a controlled landing (and possibly a go-around if necessary), would be to swing larger more scale props.

As a reference, I built my son a H9 PTS P-51 and put the saito 56 in it. It flies well with an 11x8 MAS 2-blade prop. Power off and the plane will still glide forever(but still has the droops on the wings).

I do highly recommend though, no matter what fuel engine choice you go with, that you put onboard glow on both motors.

Im not going to argue the more power vs just enough power debate. There's two schools of thought on this and both sides have merit

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RE: New Hangar 9 B-25 - 10/8/2007 3:17:31 AM   
CorsairJock



Posts: 1879
Joined: 4/14/2002
From: Parchment, MI, USA
Status: online 		Altho I have a NIB Saito .56 as stated earlier, I was also considering a pair of Saito .40s. I have one, and used it with great success in a Global Corsair, swinging a 3 blade 10 x 6. I know what these engines are capable of, and how LIGHT they are (about 11 oz with muffler!).

HOWEVER: it appears that sales of Saito engines with a dispalcement of less than .56 cu. in are non-existant anymore, or at least inthe US. Horizon does not list them, nor any other supplier that I could find (online).

This means that not only is the .40 no longer available, but neither is the .30 ('the .30 that thinks it's a .40'). Altho the .30 was not a consideration for this aircraft, I think the .40 could do as well as the .36 2 stroke.


< Message edited by CorsairJock -- 10/8/2007 3:18:09 AM >

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RE: New Hangar 9 B-25 - 10/8/2007 5:11:10 AM   
kahloq



Posts: 1698
Joined: 1/1/2006
From: Fort Collins, CO, USA
Status: offline 		Be careful with going too lite on the motors or you'll end up having to add dead nose weight to get the plane to balance. The motors sit in front of the CG so they do affect the balance. Some of the KMP B-25 builders ended up either using heavier motors(like saito 91's or even saito 100's) to avoid adding dead nose weight.
The H9 B-25 will be similar to some degree simply due to the design of the plane itself. But, H9 may have done some "sport scale" modifications and deviated a little from actual scale to affect a more generous layout difference relative to motor weight since its designed for both electrics and glow from the start.

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RE: New Hangar 9 B-25 - 10/11/2007 4:06:17 PM   
shaolintiger


 

Posts: 1
Joined: 10/11/2007
From: , AK, USA
Status: offline 		Hey John Redman and bbrundle ,
Curious thing, I just purchased my pre-ordered Hanagar 9 B-25 from my LHS for about $370 or so.
When I opened up the Nacelle boxes I found to my amazement and joyful surprise that you guys saved me some time and money and already mounted 2 Evolution 36NTs into the plane.

I am very pleased with this discovery. What I want to know, Is this a special promotion to those who pre-reserved the B-25,
Is this a mistake or Are you Horizon Hobby Guys just Coooler that all Heck?

Sorry for the anonymity of my screen name and false location but I am trying to protect my LHS and the sales people if this was indeed some mistake on their part.

-Shaolintiger

< Message edited by shaolintiger -- 10/11/2007 4:08:01 PM >

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RE: New Hangar 9 B-25 - 10/11/2007 5:57:49 PM