highhorse

My Feedback: (2)

The exhaust on my Boomer XL is somewhere between 1and 2 inches forward of the "output" as you call it. No issues. That said, whatever room you have available to move your noise maker forward will likely only save you a few ounces at most up in the nose. A few ounces on a 20+ lb jet isn't gonna make a lot of difference I think.

chrispol

My Feedback: (9)

Got everything placed will need 580grams in the nose. Also does anyone know the screw thread for the horiz stabs? I didn't get any with the kit

highhorse

My Feedback: (2)

My thanks to all who've contributed to the thread. My own T is on the way from Todd at Dreamworks, along with his electric gear and brakes. P-100 for the noisy end.

The intent is to use this primarily on the buddy box, introducing my club members to a new aspect of the hobby they might not otherwise have access to.

RAPPTOR

My Feedback: (41)

Hi.. Good info.. Maiden mine sunday.. All throws on low rate.. Lots expo.. Seems, tail heavy, at stock c/g. Floating for sure. 1/8 crow. 27% stock.. Gonna try 25%

highhorse

My Feedback: (2)

What symptoms led you to conclude it is tail heavy?

thx,
Don

redbiscuits

My Feedback: (6)

27% stock? Sorry for the dumb question, but what is that?

highhorse

My Feedback: (2)

I think he means that the stock CG is 27% of MAC, but he's unhappy with that and gonna move it forward roughly .3" to
25%.

redbiscuits

My Feedback: (6)

Anyone else use the Pro Link gear from Dreamworks? The nose gear wheel hits the former where the steering servo mounts when retracted, and without modification to either the retract mount or cutting the former it simply doesn't work.
Am I missing something? I thought these were "drop in" units?

csandt051196

My Feedback: (35)

RedBiscuits,

I modified both to make it fit the way I wanted. I thought they were drop ins as well, but that turned out to not be true at least in my case.

Good Luck
Scott

chrispol

My Feedback: (9)

For the front i raised the rails and took 1/8" off the strut

For the rear inverted the actuators and made holes through the wing former

redbiscuits

My Feedback: (6)

Thanks, I cut the mount to get the retract as far forward as possible, and the wheel now clears the former. I haven't got it sitting on the wheels yet, so not sure if I will need to raise the nose or not.

Chris Smith

My Feedback: (2)

There are pictures showing how to do it earlier in this thread.

redbiscuits

My Feedback: (6)

I'm sorry Chris, I don't have the Robart retracts. I bought the "gear combo" from Dreamworks in which they say on their website "DROP IN FIT!"

Now, not that I'm incapable of spending 3/4 of the day cutting wood and watching epoxy cure to do what you did, I just figured that after forking out a grand for the gear combo, they actually drop in as stated on their website.

highhorse

My Feedback: (2)

This is from the Website:

Turbinator ARF - Deluxe Combo

Our Turbinator struts where developed from the ground up and feature a brushed anodized finish, steel axle with locking nut and over-sized machined shoulder bolt. There is no need to shim, bush, drill or machine your struts & axles in order to make them “fit”.


Seems to at least imply a drop-in fit. I sure hope so, but haven't started that part of my build yet

redbiscuits

My Feedback: (6)

To make the nose gear work with minimal effort, I trimmed the gear rails a bit to allow the retract unit to slide as far forward as possible. I also had to widen the distance between the rails a bit to allow the retract to "drop in". Once I get the mains in, I will determine then if I need to shim the rails to get the correct AOA. By others past experience, that looks like the case, but I will wait.
The nose wheel clears the steering servo bulkhead now by about 1/8"

RAPPTOR

My Feedback: (41)

Super pitch sensitive. Floats .. Porpus on touch down..30% expo. Took off by itself and had to push nose over. Turn on iyself, split s very tight. 25 %c/g always good starting point for me

RAPPTOR

My Feedback: (41)

Thanks .. Correct

RAPPTOR

My Feedback: (41)

well c/g change was no help. i cant get this plane to slow down and floating by.. way to pitch sensative.. help

RAPPTOR

My Feedback: (41)

well c/g change was no help. i cant get this plane to slow down and floating by.. way to pitch sensative.. help

highhorse

My Feedback: (2)

Float: Without reading again what others are using, I'd say that 3/16 crow doesn't sound like much and you should be able to get a lot more than 50 flap, given the hinge configuration.

Pitch sensitivity is a separate issue: There has been some confusion as to where CG is measured from, are you sure you're measuring from the right place? What brand Tx do you have and what does the expo value say (is there even a slight chance you dialed that in backwards? Seems unlikely, but I've seen worse!)

zdsh13

I've landed mine at 1/2 flap 20-25 deg and maybe 1/4" crow and it landed great, at full flaps 45-50 deg it needs more thrust or it will stall and drop a wing without warning. Mine doesn't porpoise on landings, sounds like your too fast and still have good elevator authority and your trying to force it down. When do you chop throttle on landings? I'm basically close to idle on the down wind turn to base and bring on throttle if needed on the turn to final at 1/2 flap, full flap I'm holding maybe 20% throttle till on final then judge it accordingly as the flaps will stop this model in its tracks without thrust....

What engine are you using? I'm set up with a Jetcat P-80SE, the plane flies like a pattern plane and I like it.

ira d

I have older P80 in mine and if using the recommend flap setting it lands very good without crow. I did find if you increase the flaps more than needed they create more drag but that
could lead to a stall. So far I happy with how the plane performs.

RAPPTOR

My Feedback: (41)

thank for info.. dx -18. very smooth movement.plane can be fliying 50 mph and i can make it have severe pitch change with very small inputs..love the plane..

chrispol

My Feedback: (9)

high pitch sensitivity = tail heavy or thrust angle of the turbine

floating, bleed off speed and push the nose down (personally i trim nose down with flaps) flare just before touching down

Randy M.

My Feedback: (38)

no crow on mine. cg at 7in. i use mostly a circle approach to landing. with full flap drop the nose as i circle in toward the runway. a little power is needed with full flap near the end or you will get too slow. touchdown with some flare and roll out about 50-75 ft. I love this plane!
also using dx18