Anderl7890

Hi guys

I'm just about to finish my PC-9 disaster kit. I had to change or correct that much, that it would have been easier to scratch build one.
Nevermind, i am looking forward to maiden it in early June.

But i am wondering nowabout the control throws. The throws givenin the manual arerather small. I have had planesof the the PC-9s sizebefore
and in myexperience the throws need to be bigger.

Could some of you please post their control throws and COG.
Somehow i don't trust the COG given in the manual.Some guysuse 80mm measured from the leading edge of theroot rib. Is this COG ok?

Thankyou for your help.

Regards Andi

gcshawkey

The suggested throws are fine...set these as low rates on your Tx and use higher ones ( with expo ) on the high rate position.
Mine flew beautifully with the COG at 85mm from LE at the root. I think 80mm would be OK too.

Anderl7890

Hi Guys

Maidened the PC-9 today. CG ist fine at 90mm measured from the leading edge of the root rib.
But control throws given in the manual are much too small. I doubled the amount given as "acrobatic throws" to achieve a good roll and pitch control.
The decals are still missing on the pics, but will be applied soon. I also do a new paint job on the cowl. The white stripe didn't match the fuselage on my kit.
Gear is a pneumaticrobart 510 series. Flying weight ist 11,9 pounds. It is electric motor powered with a 6S 5000mAh battery.

Regards

Andi

gcshawkey

Nice job - and great pictures too! So, it looks like the COG is OK anywhere within the range 80 - 90 mm from root L/E.
I see you have mounted the tailfeather servos in the back end too. I also fly on a 6s 5000mahrr pack and a 14 x 10 prop, but because my motor is somewhat higher Kv than I would ideally like, the current is a whopping 90+ A at WOT.
Flies nice though, and plenty powerful enough ( approx 2kW ) What size prop you using, and what Kv motor?
I maidened my replacement a few days back - all fine except the nosewheel didnt drop for landing on the second flight, so brought her down on mains, and let the nose drop and slide along the grass. No damage at all. Seems the metal clevis attaching the servo pushrod snapped. I would really like to fit some decent retracts but they cost.

Anderl7890

Hi

My prop size is 17"x14" but it is not directly driven. I use a gear with 5:1 ratio. My prop makes about 7000rpm, means that the motor has to make 35000.
The motor itself isvery small.It just weights 130grams (4.58oz).On the second picture there is the back plate of the stock spinner installed as asize reference.
The motor is a STRECKERRS330 (german brand) that drives a Reisenauer gear. ESC is a 120Amp YGE (german brand). The motor pulls 75A with full power applied.
The efficiency of this combination is very good. About 83%. Direct drives usually have about 70 - 75%, which means in fact that 25%of the input power is "used" to produce heat and never gets to the prop.
I chose this kind of propulsion system because it is very light weight (motor + gear 11.2oz) and produces a lot of power. I don'tneed any lead to achieve the CG

The plane is capable to go vertical for a very long time.

I didn't like the stock gear from the time i opened the box. It's junk and i wonder why they put it in the box anyway. The robart 510 is fine and guaranteesa save landing.
I also changed thenose wheel well. It is much to big. I attached a cover to reduce the cut out.
The yellow strings that control the nose gear are made out of aramid.

Regards

Andi

dalkhaw

Hi. I just bought a new Seagull PC-9, 120 size. I will be fitting a 4 stroke engine on it. Based on your experience, will a 120, 4-st be more than sufficient for it? Scale flying will be my norm, but with a bit of speed could be fun at times.
rgds

Bosco2

My Feedback: (42)

Go with the Saito 180 with a 16/10 apc prop and 8 oz weight to the tail and you will be one happy camper.

DVM100

One of the guys in my club flies his on a 1.20 FS and it goes really well.

grossy2

We have 3 of these aircraft flying at our club and have a ball trying to fly in formation.
Mine has a GP26R up front the other 2 have DLE-30's up front.
2 of us have swapped out the retract for batter gear. Air up, spring down. I've had to replace the bronze bushing in my nose retract as it's done that much work.
They fly great and we have so much fun with them.

Cheers

dalkhaw

Thank you for your replies gentlemen.
Isn't the DLE 30 too big for the plane? Will it fit in the cowl nicely. I assume the supplied retracts must be too flimsy and that you had to change to better retracts. Is this easily done?

Bosco2

My Feedback: (42)

The PC-9 that I have seen with gasser engine had to hack up the cowling To make it fit.
This photo shows how a Saito 180 fit's,

dalkhaw

Thank you Bosco2. This looks a beautiful fit.

NoFlaps

My Feedback: (131)

I've got a DLE30 in mine and she fits just fine- I modified the pitts muffler to fit better, so i didn't have to hack up the cowl.

Bosco2

My Feedback: (42)

Hey Noflaps

I would love to see a photo of your set-up I would have prefer to put in a gasser instead of the saito 180,
One of my club members has the PC 9 from Black Horse with a 26 cc gasser and a hachet job on the cowling
so I did not think a gasser would fit in the cowling nice and neat,
DLE make a very good engine I have an old 50 that when in use proved to be reliable and strong not to mention$$$
compaire to DA, The DLE 30 is very compatible in weight and CC comparing it to the Saito 180, the big difference is Gasoline
at this present time is cheaper than Glow fuel.

dalkhaw

Hi noflaps. Pls post some photos of your set up. I think I will fit a DLE in mine. Thanks.

donddsms

My Feedback: (1)

Bosco,

Here are images of my DLE 20 in the cowl. Doesn't look too bad, and I was able to preserve the fake exhaust pipes.

Don

NoFlaps

My Feedback: (131)

I had modified the pitts muffler so it will fit under the cowling...But here's the pic of the engine with cowl off and engine with cowl on. You can see I cut a new access hatch (that I haven't cleaned up yet)- So that part looks rough. Tghe access hatch is actually for the "Sullivan" smoke system access.
I've also changed the cockpit area and added a few details.
I know this plane doesn't have the cordite lines on the canopy, but I aded them- since I think it looks cool.
-FYI- that's a DLE 30, so I can swing a 3 blade prop (as shown) if i decide to.

markhamregular

I am planning to acquire one of the those PC-9.
I have a 2-stroke OS 120, do you guys think it's a good match for this plane?
Is Black Horse the same as the Seagull?

Thanks,

Merlin Man

Hi,
I have had the Seagull and Blackhorse PC9's

Firstly, let me say that the OS 120 2 stroke is a great match for both of these. They both fly very well with plenty of power.

Both models are the same size. The BH has a few more features including flaps and an internal rudder linkage. The BH has a set of nice looking but poorly operating air retracts. The Seagull has mechanical retracts but thesecan bea problem. I ended up with Eflite 60-120 retracts which fit nicely. (these have had a few issues as well !, but are overall much better. )

The Seagull has the blackwing walks on the upper wing.

Itis difficult to say whichis the better of the two.I think the flaps are useful but you paymore forthis one. They are both great looking and flying models.


Cheers,
merlin Man.

Merlin Man

Hi,

I will try again to upload the photo of my Blachhorse and Seagull models...............................

Bosco2

My Feedback: (42)

Hey, Donddsms

Not bad,
Looks good and to run Gas in stead of glow is worth the extra work.

Bosco2

My Feedback: (42)

Hey, Noflaps

Nice Nice Excelent job, Now I have to figure out how to do that, I would love to run gas on mine,
To morrow Ill be taking my PC 9 up for the first time,
we have a good break in the weather for this weekend,

markhamregular

Thanks for the info Merlin Man.
I noticed the BH is $100 more than the Seagull.
I was not going to use either mecvhanical or pneumatic retracts anyway. I am glad the E-Flite works.
If I go with the BH and the Eflite retracts it may end up a little pricey.
Anyway, I'll keep looking before I make my decision.
I am glad to hear from someone who had both because I read a few bad things about the BH.
Also, I noticed they mention 20 hours plus to build the BH. Usualyy ARF manufacturers always estimate 10 hours or less.
It must be a little difficult to build. I hope the manual is good.

Thanks and take care

NoFlaps

My Feedback: (131)

FYI- Mine is actually a Black Horse PC-9.
I bought mine for $125.00 at a scratch & dent sale through Hobby People (West Coast company) about a year or so ago. I had chosen the BHM over the Seagull because the BHM has FLAPS, and I like the option to slow my warbirds down on Final...Though we have a descent size runway at our field, I don't like to worry about the thing having too much speed and me hoping i'm not going to burn it all up during my landing flare.
If I hadn't found such a good deal on the BHM, I would have purchased the Seagull ARF, then would have purchased the BHM wings separately f-just to get the flaps. (Normally I would have just rebuilt the wings myself, but given i have 2 kids now, I no longer have the the luxury of time).
Up to this point, I had always believed that BHM & Seagull were the same factory- given so many of their ARF's share such common features. I've had a bunch of both companies planes and the similarities are soo similar-you'd think there's 1 factory and several brand names on the building. In my opinion, Phoenix ARF's are also nearly identical with these 2 companies as well- right down to the color of paint they use to paint the aircraft firewalls, and the printing / photos on the box & instructions.
Anyway, The 2 planes from the 2 companies are in-fact actually slightly different.
Mine came without a canopy- and given my luck with Hobby People and their stock of spares is hit & miss, i went through Horizon & purchased a Seagull canopy, however it didn't fit !-
I later finally found a BHM canopy. I had also purchased the Seagull markings (which look nicer than the BHM one's.- So that's why mine looks more like the Seagull (#62), but there's actually a mix of the 2 decal sets on her.
Mine has the E-flite electric retracts that work very well- But, the stock nose gear is too thin of wire to prevent it from having a lil' bit of sway from Lt to Rt. So i intend to change out the nose strut given it's high visibility anyway.
Hope this info helps anyone out there a bit.

NoFlaps

My Feedback: (131)

Let us know how your flight went Bosco2- pics and video are always a plus too.

I hope to fly mine by the end of the month...I see about getting a friend there to video as well.