combatpigg

My Feedback: (3)

The time is right for me to do an ULTIMATE. The 10 lb, 120 powered plane was awesome [my first big plane], and years ago I made copies of the original in different percentages. Trouble is I never had a copy that looked just right for my TD049. Now that there are so many more choices for 1/2A power and cheap light weight gear, now's the perfect time to build a "full house scale type "1/2A. I made a 90% copy of a 50% copy to come up with a 24" span. The wing chord at this size is only 4.5 inches, so I have cheated and moved that dimension up to 7". The dieselized .061 might be the way to go, the main drawback is you have to do an extra good job of fuel proofing to keep that insidious residue where it belongs. I've got the hang of vacuforming now thanks to all the good reading I found about it here. To all who haven't tried it yet, you will amaze yourselves with how well it works, and with how simple the setup is. Anyway, the cowl and canopy will be done that way, and just say NO to landing gear!

Andrew

CP --

With two wings, you do realize that this bipe may not reach your desired speed of 160 MPH even if you do turn 30K!!

the "other" Andrew

combatpigg

My Feedback: (3)

Hi Andrew! You're RIGHT! What was I thinking? The firewall looks big enough for a NELSON .40 though...

ajcoholic

My Feedback: (10)

Why the massive increase in chord? It looks sweet though...

Have you looked at Bipe Flyer's contest Ultimate from last year? Videos are still on the site...

AJC

combatpigg

My Feedback: (3)

HI AJC! Thanks for the kind words! The REYNOLDS numbers[on a chart that I have seen] show a relationship between wing chord and the ability to create lift. What the numbers show is that unless you're into indoor rubber ,wings with 4" or less of chord don't work nearly as well as wings with more. With enough power, and low enough wingloading the 4" chords can work, but the increase to 7" didn't cost much weight wise, won't hurt the speed, and will greatly enhance the low speed handling and aerobatics. Yes I have seen BIPES' BIPE, and it is fantastic! My other difference from his is I'm using a CLARK Y type airfoil, and will be hand launching it. So far what you see in the picture weighs 4.6ozs, so there's still some hope for good vertical. This plane might be a natural for the diesel 061.

combatpigg

My Feedback: (3)

I made some more progress. The cabane struts are 1/32" plywood with carbon fiber strands glued on, worked good. The "inter plane struts are 1/8" HARD balsa, and will get glassed on one side. The lower wing comes off with the removal of 5 screws. The plug for the cowl was mostly carved on the tablesaw, a block plane, and sanding blocks. A single hunk of 4by4 was just big enough. As of right now the airframe weighs 5.4 ozs, with only a rudder and ailerons left to go in the wood dept., and of course the canopy and cowl. Seems like 8ozs ready for covering and hardware is feasible.

ajcoholic

My Feedback: (10)

Looks great! What are you covering it with??

I cant wait to see how this baby flies....

AJC

combatpigg

My Feedback: (3)

HI AJC! I think I'll do it all with ULTRACOAT. I still have the original "BLUEHAWK" stickers that came with the GOLDBERG kit, so those will get shrunk down and put on . Sign makers can make self stick decals, I figure if I can get them done for $20 then that's the way to go.

wild fred

My Feedback: (3)

I have a set of bluehawk stickers somewhere for the ace simple ultimate if you need them. it was 30" span or so.

kew

you know ..just saying since your talking about what cover to use but my opinion monokote sucks you cant get wrinkles out no matter how much heat you use..ultra cote is much more less hassel..

combatpigg

My Feedback: (3)

HI WILD FRED! Thanks for the offer! How did the ACE BIPE FLY, and HMDIW? [how much did it weigh?] Do you think they use that in dating chat rooms? HMDYW?

MR Flyer57

Hey Combat,
Just wanted to drop a line on ya and warn you to keep it away from your rottweiler. It looks good enough to eat!!
I hope you have been working on that in secret, because you have gotten a lot done!!!
Just love the way the ultimate looks,
MR Flyer57

ajcoholic

My Feedback: (10)

Hmm, I have been using Monokote since the mid 1980's and have never had any problems with wrinkles... but it will crush fragile structures if you try and shrink it too much.

AJC

kew

everyone has opinions ..monocote sucks is mine...

Bipe Flyer

I find Ultracote easier to use. Monokote requires a little extra attention, but some guys are really good at applying it.

combatpigg

My Feedback: (3)

HI GANG! I've made some progress. I decided that if I was going to run a diesel engine on this thing, iron on covering wasn't going to work with all the nooks and crannys for residue to get into. I covered it with silkspan and maybe half a million coats of dope. The next step will be making the cowl, I think styrene should work for that. I'm going to put either white, or yellow trim on the top wing, and on the sides, then a spray coat of polyurethane to make it fuel proof. The canopy was formed out of a pint size AQUAFINA bottle, nothing but the best! I have it all rigged up on a test fit and it weighs 15ozs[minus cowl]. I'm sure a lot of weight could have been saved with iron on, but at least now I have a good excuse to tell my wife why I NEED an .074! I REQUIRE UNLIMITED VERTICAL, and she knows it!

ajcoholic

My Feedback: (10)

That hydraulic jack looks pretty "unhappy" holding that massive plane CP!

AJC

Andrew

CP --

Lookin' real good there -- hope you don't blow a seal out of that jack. However, all you young guys have a misconception about silkspan and dope (somethin' we old folks have known all along) -- silkspan and dope is lighter than the plastics. Now I wouldn't go too far out on a limb and say it's lighter when it has "maybe half a million coats of dope", but medium silkspan with 5 coats is lighter -- lightweight silkspan and three coats is even better.

Don't worry, I would never pass that information on to your wife -- certainly don't want to ruin your excuse to get an .074 [8D]

Here's a link to some representative covering weights: http://www.modelflight.com/weight.html

the "other" Andrew

ajcoholic

My Feedback: (10)

You mean that original Monokote ad lied to us???

I prefer nowadays to use a synthetic tissue-type covering that comes prepainted - like Litespan, or Micafilm. Theya re lighter than silk and dope. (may not look as good, but they are strong and light)

AJC

Andrew

It ain't called MoneyKote for nothin'

That's true -- particularly the Litespan. Like much of the other equipment we use today, the coverings have improved too. I think the more affordable lightweight radios have done much to push the other portions of the market to respond to the needs/desires of the small plane modeler -- and the "park flyer" revolution has added enough volume to make a little R&D worthwhile.

Still, there's just something about the smell of butyrate -- for me, it smells like modeling -- like going to the field when there is a lot of flying and the air smells like burned fuel and castor.

the "other" Andrew

ajcoholic

My Feedback: (10)

Moneykote? HAW! Have you priced SILK and DOPE lately??? [X(]

AJC

MR Flyer57

Great job combatpigg!!
I now have to jump in and get to work on mine!!
MR Flyer57

wild fred

My Feedback: (3)

hey, combatpigg! looks good! I found the ace decals, if you want them. The ace ultimates fly good, have had 3, 2 with norvel 25, one with saito 30. 30 one would prop hang, no pullout. norvel ones were awesome. search posts for "my 3rd simple ultimate", I posted pix of it a while back. made balsa sides on my last one, and cowl. looked good, flew good. don't use stock strut mount, put a bolt in it as nyrod snaps. otherwise a simple, fun plane. flies much larger than it is. I got a saito 72 one and a goldberg w/ saito 180 also, am an ultimate fan for sure!

just email me an address and I will mail the decals

combatpigg

My Feedback: (3)

HI WILD FRED! That's great of you to offer those decals! I hope you don't kick yourself someday if you end up wanting to use them, but if you do, I'll just peel them off and give them back. I'll bet your CGU with the 180 is a show stopper[X(]! The NORVEL .25 is a hot engine, isn't it? I've only seen them running full tilt in combat applications, and haven't seen how well they handle overall. I'll send along my address, and thanks again!

wild fred

My Feedback: (3)

hi! the 180 one is neat, but not as neat as my sig profile with a scratch built full fuselage. flies like a profile, but better and lighter; about 4 lb. w/ a saito 72. hovers on the deck! will send the decals as soon as i can! you know, I have most of the bluehawk decals from that one also, as I went with the chip hyde scheme imitation is the sincerest form of flattery?