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new Arf Boomerang 14lb thrust

Old 09-15-2006, 03:37 PM
  #1401  
shesha
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Default RE: new Arf Boomerang 14lb thrust

Well I nearly sort of completed my build of my baby intro, blue and yellow scheme 3 days build process needs about 4 days, did some mods here and there will have some pics posted tommorrow, also installed sandors retracts, exceptionally well built and may I add an attention grabber, seems like the LHC visitors were more interested in the retracts then the baby Intro.

Old 09-16-2006, 09:26 AM
  #1402  
TAILHOOK-RCU
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Default RE: new Arf Boomerang 14lb thrust

Built mine with fixed gear. I was wondering if anyone who used retracts would like to sell their fixed gear parts. I talked to the people who manufacture the kits, they do not have parts at this time.


Thanks Bob
Old 09-16-2006, 04:44 PM
  #1403  
Lil Hoss
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Default RE: new Arf Boomerang 14lb thrust

For what its's worth............ I put flights 34 and 35 on my boomerang today at our local airplane and helicopter funfly. The boomerang was the highlite of the fun fly. We had a brisk southwest wind and that plane landed smooth as silk. Our field is grass so take off and landing are a breeze. No better feeling than landing and having about 75 people clapping and cheering and asking a million questions. I'm thinking now of selling the boomerang and moving up to something faster. Wonder if I'll make a mistake by selling such a fun Jet????

Thanks
Hoss
Old 09-16-2006, 05:57 PM
  #1404  
teg-1
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Default RE: new Arf Boomerang 14lb thrust

Does anybody have any pics of the brakes on SAndor's retracts? For the boomerang.
I know they are air just wondered about the brake it self.
Are they o-ring ?type of hub on the wheel, Pics ?
Thanks! In advance
Old 09-16-2006, 06:23 PM
  #1405  
bidrseed2
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Default RE: new Arf Boomerang 14lb thrust

Anyone using flap for takeoff? and if so how much??
Old 09-16-2006, 06:48 PM
  #1406  
shesha
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Default RE: new Arf Boomerang 14lb thrust

pst, the retracts are top quality stufff, the brakes like you mentioned are o ring type, via airpressure. They will seal tight against the wheel hub, there is an o ring to keep the air in place. Will take some pics shortly.

lil hoss, you might want to look into the composite-arf eurosport, couple of friends who have had the baby B, have jumped up to the eurosport as the next step up for a jet plane. The Jolly roger scheme is really nice.

Tailhook, I have my set that you can have for free if your interested, though the shipping might be some what expensive, if your interested I can have them checked out to you via dhl, fedex or ups. also have the 101HD that am not using, i'll through that in for you against half their price for an order from towerhobbies that I need. If you need pics pm me. I might also have 4 sets of fixed landing gears soon maybe tommorrow or after tommorrow have 4 baby intor to build for the LHS.

The only missing item that will not be part of the deal is the hard wood block which i am using for the retract upfront. Check the front retract pics.

Here are pics of my baby B, did some mods from other builders on this thread some good ideas, I decided the opening of the rear retracts where just an eye soar, so decided to close them off with some balsa wood and extra lue ultracoat from the baby B package, might even consider doing some doors also.

The front retract will be covered with the extra wooden part that was removed during the build. Smoke tank might be later incorporated.

Rear exhaust area has been paited with BVM heat shield, and rear elevator stab mid section was taped off with some aluminium tape.

Will post pics of the entire baby put together shortly once I finish the final touchs.


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Old 09-16-2006, 06:56 PM
  #1407  
shesha
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Default RE: new Arf Boomerang 14lb thrust

some more pics .. I decided to epoxy min section in first with 30 moniutes epoxy open up a little more on the oracover and go over it with some aeropoxy (hysol) this thing is not going to come apart, for added security I put in 2 wing bolts cant be seen under the p60.
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Old 09-16-2006, 07:10 PM
  #1408  
teg-1
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Default RE: new Arf Boomerang 14lb thrust

Thanks for the Pics.
How are you going to run the steering servo, cable , pushrod?
Looks like it will get tangled or jam when the gear retracts forward.
Old 09-22-2006, 03:42 AM
  #1409  
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Default RE: new Arf Boomerang 14lb thrust

about 12-15 hours work..

i love this bird..

now just missing the turbine plumbing, CG check and finally screw check and loctite..

when i have the weight he need for the CG, i need to order the batteries t get the best weight for the CG...to spare lead...


the only point i hated: pulling servo wires when the original pulling wires has fall out! [:@]

ok..was my fault..
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Old 09-24-2006, 02:48 AM
  #1410  
Airbourne in Japan
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Default RE: new Arf Boomerang 14lb thrust

i am thinking of getting into turbines in the future and was wondering if i could get the boomerang to fit in my car. does the wing and tail come off for transport or do you transport it as a complete plane ? sorry if this is a silly question !!
Old 09-24-2006, 03:00 AM
  #1411  
acrodust
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Default RE: new Arf Boomerang 14lb thrust

yes you can transport the baby boom in your car . all parts can be come off , I try to send a picture of the boom in my car .
[img][/img]

Christophe

www.jetunivers.com
Feibao and Rt-Hammer dealer
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Old 09-24-2006, 03:06 AM
  #1412  
Airbourne in Japan
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Default RE: new Arf Boomerang 14lb thrust

hey thanks a lot Christope, now all i need to do is practice flying for a couple of years until i'm certain i can handle it.
Old 09-24-2006, 04:29 AM
  #1413  
rorywquin
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Default RE: new Arf Boomerang 14lb thrust

If you can fly a low wing aircraft competently, you can fly this.
Old 09-24-2006, 11:09 AM
  #1414  
frothingslosh
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Default RE: new Arf Boomerang 14lb thrust

swissflyer -

Haven't seen a post from you yet on your maiden flight???

Got my maiden in a week ago yesterday. Four flights on Saturday afternoon - was a PERFECT day. Got the rudder/flap mix worked out. My CG is almost 1" behind the 190mm from the l.e. that the instrs. call for with dry tank and the P-70 as far forward as possible. But the BB flies fine this way with no bad habits exhibited (I'm using a Mueller 75 oz. Kevlar tank). Ended up with about 17% down elevator at full (85 degree) flap to neutralize nose pitchup. My high rates were set as per Alan's instrs on all throws. I found these to be a little sensitive for a "newbie" like me, so I set low rates on ail. and elev. at 65% with 25% expo. This worked out perfectly for training purposes - flew smooth as glass, but still had enough throw to do nice loops and rolls with good authority and movement to spare..

The P-70 performed flawlessly and provides close to 140 mph at WOT. The SpringAir retracts worked great - would recommend them to anyone for this plane.

The BB sure is ONE SWEET PLANE for the first time jet pilot!!! If you can't fly this one, sell your stuff and find a different hobby.

Old 09-24-2006, 02:08 PM
  #1415  
teg-1
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Default RE: new Arf Boomerang 14lb thrust

Frothingslosh
What model # of Spring airs are you using?
Thanks!
Old 09-24-2006, 03:04 PM
  #1416  
frothingslosh
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Default RE: new Arf Boomerang 14lb thrust

PST -

They're the ones that Alan sells and recommends for the BB. Can't remember the number right now. I used a restrictor on the "up" side only to keep them from banging shut so hard - worked perfectly. The springs are OK for extension without any restrictor.
Old 09-24-2006, 03:15 PM
  #1417  
teg-1
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Default RE: new Arf Boomerang 14lb thrust

Thanks! Will give them a call..................
Old 09-25-2006, 12:32 PM
  #1418  
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Default RE: new Arf Boomerang 14lb thrust

ORIGINAL: frothingslosh

swissflyer -

Haven't seen a post from you yet on your maiden flight???

i work on my plane very intensive, but seldom...

now i'm at the stage to install wheels, test the tanks/turbine piping, check CG and buy batteries

but depending on my working plan, maiden can be in 2 weeks or next year...[]
Old 10-01-2006, 02:59 PM
  #1419  
bidrseed2
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Default RE: new Arf Boomerang 14lb thrust

I have a wren 54 mk2 and am using about half flap for takeoff. The local strip is grass, and i can get airborne, if i go downhill, with a headwind, and diagonally across the strip. I get airborne anything from 0-5m away from the end of out strip. There isnt any room for error.
Suggestions that ive recieved are.
1) raise the incidence of nosewheel( contrary to the instructions)
2) Get a stiffer nosewheel- i use a robart wheel, which is probably boggin down.
3) Use bigger main wheels- im using 2 3/4 intairco- theyre nice wheels so im reluctant to dump them, given the other set i have i think and 3 1/2
4) Use flaperons- would involve sacrificing a channel or buying a JR matchbox. But would spoilerons be better?

landing isnt an issue into the field, so maybe 1) may be enough.

Can anyone suggest what i should do first??
Old 10-01-2006, 03:10 PM
  #1420  
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Default RE: new Arf Boomerang 14lb thrust

If you've got room (and stability!) to play with you could move the CG aft. That will aid an earlier rotation. You can also lock your brakes, run the turbine to max before brake release. Or have someone hold it and release after run-up.
Old 10-01-2006, 06:56 PM
  #1421  
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Default RE: new Arf Boomerang 14lb thrust

Hello

Does anyone have a recomended servo list for the Boomerang, Alan says(on the promo video) you need a moderately strong servo for the elevator and that the rest of the flying surfaces don´t even require digital servos as long as they are good quality and mildly strong.


Is there a "definitive" servo list in as far as torque goes or pretty much anything will do?

Also would like to ask for battery setups used by most of you.


I have read this thread almost completely and these two subjects are not widely disscused.

Thanks for any information you can provide

Pedro
Old 10-01-2006, 07:25 PM
  #1422  
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Default RE: new Arf Boomerang 14lb thrust

Alan is correct. Digital servos are NOT required. Use 60oz on the rudders, 110oz on all else. Digitals DO make flying nicer. I use digitals on all my jets. My flying buddies Boomerang has over 125 flights on analog servos and does just fine. Let your budget decide.

Dave
Old 10-02-2006, 07:47 AM
  #1423  
frothingslosh
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Default RE: new Arf Boomerang 14lb thrust

Pedro -

Just finished my Intro. Used 150 oz. digitals on elevator and ailerons; 110 oz. analogs on rudders, flap and nosewheel. Some would probably call this overkill, but this is my first turbine plane and it didn't cost that much more for the security of a little extra power all around. With my P-70 pushing the BB at 140 - 150 mph, it's good to know that I don't have to worry about the possibility of marginal power to any of the surfaces.

By the way, it's a real RUSH to fly!!!
Old 10-02-2006, 03:43 PM
  #1424  
bidrseed2
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Default RE: new Arf Boomerang 14lb thrust

I used 8411s on the flap and elevator and 8231s on aileron. I used 3421s?? on rudder. Flies great on them, feels slike it flies on rails.
8411=11kg 8231=5.5kg
Old 10-02-2006, 04:44 PM
  #1425  
teg-1
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Default RE: new Arf Boomerang 14lb thrust

frothingslosh
140-150? Sounds little embelished
Did you have it checked by radar
I pushing almost 20lbs of thrust and going only 132 at best...........
Thanks......

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