Turbinac

On the elevators and ailerons, the rearward position of the horns builds in some differential, and on the flaps you can get a much larger down movement so the airbrake effect is more pronounced, which is unachievable if the horn is mounted near the hinge line. The actual pin of the pushrod clevis is a fair bit forward of the horn itself, so they are not as far back as they look.

Alan

David Searles

My Feedback: (49)

Alan,

Thanks for the answer. Are we going to see you on the West Coast this year at Desert Storm in Phoenix next month, or CA Jets in April?

David S

Colin Gontier

Here's a video from todays flying. We had blue skies - a very rare sight in these parts!!

[youtube]http://www.youtube.com/watch?v=pHuq4DODILs[/youtube]

hbutler

Anyone else have any data on the battery setup(nose weight) they are using to get the CG right? Got one of these coming soon, still need to decide on batteries. Previous post list two 2000Nickles and a 4300Lipo. Sounds like about 1lb to me.

Dave Wilshere

What turbine will you use? (weight wise) Also servos in the tail, weights vary and with a reasonable tail moment arm the grams add up. I'm sure the model flying has A123 cells all in the nose, I think some weight too, but the guys who have just finished their Torus models will be better informed!

regards

Dave

hbutler

Sorry... Should have stated that... It will be a jetcat titan. 8411s on all surfaces. Have decided on flaps servos yet. I have a 7955 lying around that I'll use for nose wheel.

Ali

My Feedback: (5)

Hi hbutler,
As big a battery as you can. We have set two up now and the first was with 2x 3300 Mah 6 volt Sub c's This one is now flying with almost no weight in the nose. The other we set up with 2x 2200 Mah 2 cell Lipos and this one needed a 1lbs + of lead to get it to balance. No issue, as I have flown both jets and you cant feel the weight difference when flying.
Regards Al

hbutler

Thanks Ali,

ECU bat? I'm assuming it is forward also... Have any pics of the install? Think of using lipos, as they are generally cheaper. Just don't want to deal with charging outside the plane...

Thanks again!

Ali

My Feedback: (5)

No problems.
Everything as far forward as possible is advised. I dont think we have any photos I am afraid. Sorry.

zonker123

My Feedback: (21)

In addition to the above it took another 1-1/2 lbs in the nose gear compartment to achieve a good c/g. If you balance on the wing tube per instructions you will be nose heavy. I got pretty much settled on a spot about 1/2' behind the forward tube.

As mentioned before, I've been flying with a Jet Central Super Eagle. replacing it with the updated Rhino in a couple of weeks. Should really be fun then.

take care
mike

David Searles

My Feedback: (49)

Photos of my install, so far. I've got 3 - 4 cell 5200ma Li batteries mounted on the tray as far forward as possible. 2 are rec/servo and 1 for ECU. Don't yet know if that will be enough.

Jet Central Rhino for power. Should definitely be enough!

David S

hbutler

Thanks Dave, Install looks great.

hbutler

Additionally Please do post back to let us know if it is enough.

PaulD

My Feedback: (39)

When you say 1/2" behind the tube - do you mean behind the rear of the tube or the center of the tube?

PaulD

zonker123

My Feedback: (21)

Sorry, should have been more specific. 1/2" behind the rear of the tube. i will try to get an exact measurement this weekend when I get the plane out of the trailer at the flying field.


mike

PaulD

My Feedback: (39)

Thanks Mike,

The timing should be great as I plan to do the CG check this weekend. Sounds like I can aim for 1/2" behind the tube and that will get me pretty close.

I'm gonna try posting some pictures of some of my build - not really my thing but I'll see what I can do.

PaulD

BaldEagel

Just a suggestion guy's what can be very usefull on these bigger airframes is an indication of the C of G of the fus without the booms, wings or canopy on, gives a rough idea of where to place the equipment without having to rig the whole thing inside a small workshop or worse out in the snow. LOL

Mike

hbutler

Pics are good

hbutler

Can you guys comment on how well the CA hinges are holding up? I've seen a post of someone replacing them. I'm a bit concerned, particularly with the flaps if they were deployed with too much airspeed.

BaldEagel

The CA hinges are the same on all the Boomerangs and if you heed the advice to only use thin CA they are very capable, try to destroy one with two pairs of pliers on either side, you will be supprised how strong they are.

Mike

Colin Gontier

With regard to the C of G, I have just checked the current Aggressor scheme Torus I am flying (the one in the video above) and C of G is exactly on the centre of the front spar with booms and tail on.

As with the common consensus - batteries as big as you like and as far forward as possible. Two A123 packs in the nose wheel well of this model and a 2200mah ECU pack as far forward as possible in the nose equipment tray. There is also some lead right in the nose.

Everyone has their own preference but this is a good starting point - its what the instructions suggest as well [8D]

The "demi gods" that are Ali Machinchy and Dave Wilshere have both flown this model and are both happy. (See they agree on all the important stuff )

PaulD

My Feedback: (39)

Some pictures of the build. One of my goals right from the start was to be able to carry a fairly large amount of smoke fluid and hence where to put it.

A buddy of mine had a tank left over from a build that looked perfect so I took it home and it dropped right into the well right in front of the main tank. The tank is 80 oz which raises some concerns about cg shift so I am going to experiment with the amount of fluid in the tank by slowly adding more with each flight.

Putting the smoke tank here meant not a lot of room for the equipment trays and air tanks. I moved the air tanks to underneath the main fuel tank and put the air valves on a sub-shelf between 2 bulkheads.

PaulD

My Feedback: (39)

The servos hatches are the standard Boomer issue. I had reservations about using these but some buddies with experience said they are pretty tough.

I added a piece of carbon rod over the rudder link rods as they are all threaded and pretty long. The rest are very close coupled. With the exception of the rudder pieces, the links are pre-cut.

All of it is Sullivan 4-40 stuff and great quality.

PaulD

My Feedback: (39)

The retracts fit into bays in the fuse center section and seem to be well supported and tied into the formers.

I used MAP retracts with Dreamworks Pro-link gear and Intairco Wheels/Brakes

The MAP retracts have the unique feature of a mechanical ball link nose steering eliminating the need for pull-pull steering wires with the associated hassles. There is also a ball detent in the pivot block so the nosewheel stays centered as it retracts. I tried and it will stay there even with the fuse 90 degrees on it's side.

I've done a bunch more work since these pics were taken and will try to add some more later.

PaulD

My Feedback: (39)

Turbine install pics

Put the Turbine ECU standing upright on it's side on the LHS of the fuel tank support.

IQ-Hammer 170+ for power - love that single solenoid set-up and the simple connections.

Location of fuel filter and air tanks also shown.

PaulD