rcuser002

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Friends,

I have aquired an Andrews Aeromaster from a fellow club member that was built way back and is in pretty good shape.

I'm putting a YS91 FZ (around 30 oz w/muffler) in it because of the tail heavy tendencies that the plane has because of it's short "moment".

I'd rather put in real engine weight than "dead lead" in the nose.

There WAS about an extra pound in the cowl before I cut about 1/2 lb out -

i might still have to cut the cowl to shreds to get the other 1/2lb out if necessary

She's the one with the swept bottom wing and 50+ inch top wing.

I'll post a jpeg soon - she's in military scheme (gray and yellow)

Can anyone give me some tips and comment on what i should expect and if they think this is a "good match"?

root

rcuser002

My Feedback: (12)

Friends,

Here she is without the 91 in her yet and with only 1 strut - notice how the strut is at an angle? I s that too much of an angle or are they sometimes done like that?

Any comments are welcome ---please!

root

Mike Denest

My Feedback: (1)

Root,
It looks good and should fly just as well. Although it is fast and maneuverable, you can slow it down and coast around the circuit. You will find that it will not need all that power so throttle back when you don't need it.

rcuser002

My Feedback: (12)

Mike,

I realize that the 91 is going to be a little overkill but like I said before , I'd rather have the engine weight rather than "dead lead".

What do you think about those 'slanted struts? H ave you ever seen them slanted to that degree before?

I'm thinking of maybe wires instead since they aren't really necessary structurally - or maybe they are seeing as how the YS91 might be stressing them torque wise?

What do you think?

Bob G aka root

Deadstik

My Feedback: (8)

Bob,

I wouldn't worry about the angle on the struts... the plane doesn't need them.. they just look nice. Also.. to keep a LOOOONG story short.. an Aeromaster will fly quite well on just the lower wing. A bit quick.. but it will do it. I can't imagine why your plane had so much lead in the nose. I have not built a Great Planes Aeromaster, just the Andrews kits and I never had a tail heavy problem, even with a light K&B .61 and silk and dope finish. Go figure.. anyway.. the YS will rip the wings off that puppy if you don't throttle back every now and then... so have fun.. The Aeromaster is quite a plane...an excellent classic.


Dan

Carolina Custom Aircraft

Mike Denest

My Feedback: (1)

Bob,
The wing struts are fine, as Deadstick (Dan) mentioned. Shoot, get out and fly that puppy! And don't forget, you don't need all that juice up front so throttle back and enjoy. BTW, mine will get a silk & dope finish with a brand new OS .60 Goldhead. Now all I need is a Kraft Custom Proportional to complete the package.

rcuser002

My Feedback: (12)

What size prop would you guys recommend with the YS91?

I was going to put the YS91 in a Sig Mayhem with a 16x4W for 3D stuff but because the YS needed repairs, I wound up putting a Saito 100 in the Mayhem with a 15X6.

I also have a 14x8 on hand as well as the 16x4W.

I really want to fly the Aeromaster in only a scale/sport sort of way.

Bob aka root

moodier

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Hi;Have one with swept wings bought it in the bones and have it hanging in shop looks well built.My thought is that Ihave a saito 100Twin that have never found a home for.Thinking that might work here guess they aren't to powerful but would add nose weight to the plane!Every bipe I have had seems to be tail heavy!This one comes with a built up wood cowl of the type for a radial engine and he sent a plastic cowl much like a Pitts style.Think the round one looks better.Have no plans for it has both wings swept and ailerons on lower only Is there any need for the upper wing ones.Has no struts with it sounds like they are optional?Thanks!

Mike Denest

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I'm swinging a 16x4 Master Airscrew on my 12#, 76" Big John bipe with a non-Surpass OS .91 and the thing ain't even breathing hard!

rcuser002

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Just got the YS back from repair and dummy mounted it to the sideways engine mounts that it came with.

I'd have to cut the crap out of the cowl to get it to fit and would have to add too much weight to counterbalance it.

It does balance almost perfect from front to back - amazing how heavy the YS is at 30+ oz. --I couldn't even think of putting in something like a light Saito and then adding 10 ounces of dead lead.

So I guess I'm going to put the YS inverted.

Check it out, what do you guys think?

root

rcuser002

My Feedback: (12)

Friends,

I've decided that it's just way too much trouble so I'm going with a 2 stroke OS61 or a Tower Hobbies 75 unless anyone else has any recommendations as far as a powerful enough 4 stroke that can fit better?

What do you guys that have Andrews Aeromasters think?

What are you using for engines and what size props can you get away with as far as a decent ground clearance?

root aka Bob G

skypupmut

mine ballances out perfect with a Magnum 91 4 stroke
real sweet engine, almost unlimited vertical.with it.
very pleasant aircraft one of the best if not the best bibe around.

rcuser002

My Feedback: (12)

skypupmut

Got any pictures of how it's mounted?

sideways - upright - inverted?

root

skypupmut

it is mounted upright,, would look better sideways ( much better )
will try to reduce photo

moodier

My Feedback: (1)

Hi;Just question,See that the yellow one has no wing struts,mine doesn't either is that OK all others bipes I have delt with have struts of some sort?Thanks!

skypupmut

the wings are strong enough to not need the struts,
they look much better wit them.
I got mine in a bent configuration and did not add the struts when I recovered it
I have a NIB kit that will have the struts and 4 ailerons installed
when I build it.
I have been flying mine very agressively and it stands up very well
with no sings of stress at the wings ( does it ever do nice and fast snaprolls)

caf2461

My Feedback: (6)

I have a Saito 60t Twin in mine and it balances out just a tad nose heavy. I think you will be fine with the 91 just don't yank her around too much and go with the larger low pitch prop. This is one fine sport plane, but now I am into 3D so I've decided to sell mine:
http://www.rcuniverse.com/market/item.cfm?itemId=139340

rcuser002

My Feedback: (12)

Haven't done anything yet except now I'm swaying towards using the YS91 inverted - hey as long as I have it and it's not being used for anything else ..........what the heck.....at least that's how I feel today.

root

skypupmut

on its side would be better, easyer to get to glow plug, and less chances of flodding the plug with oil after a few days between flights
but should work anyway.
the YS should make it perform very well.
like I said before a little more power is always a good thing in a biplane

rcuser002

My Feedback: (12)

Yeah but did you see how "lopsided" the freeking thing looks? How do I compensate for all that ? Just doesn't seem right to have to add a 1/2 lb to the opposite side or.......... is it an acceptable practice..........I'm still a Novice in the building / mod skill department?

root

skypupmut

usually nopt a problem after batt and servos installed in left side of fuselage, pleanty of room in there
if more lateral weight is needed, much less is needed in a wing tip.
enjoy the aeromaster .

Build-n-flyer-RCU

My Feedback: (4)

I would mount the YS however it looks the best. They are not sensitive to mounting position and since the fuel system is pressurized you don't have to worry about the tank height affecting performance. You can always install a remote glow starter to keep from having to reach under the plane if you decide to mount it inverted.

I have two YS engines mounted inverted on my P-61 'Widow (110's) and haven't have any problems at all with this setup. And engine reliability on the big twin is important!

Walt

chasguy

I fly my old Aeromaster with a Kraft .61 and no struts. The struts were a real pain in the tush so one day I just left them off.

AS to balance, no lead just move radio and battery around. Can't understand why.

This A/C is fun to fly but it is definetly not a trainer! Good Luck