Official Black Horse 2280mm F4U Corsair thread

[vasek]

Hi guys, I just joined the group. I have the V1 BH 60cc Corsair and the plane is not with me can someone tell me the inside dia. of the Cowl ? I'm thinking of putting a twin and this afternoon I saw a guy flying a "60cc" Bearcat with a DLE 111cc twin- man it was hauling a$$ ! The engine is 255mm (10 inches ) across. Will it fit ? Thanks

[vasek]

Yeah I had my oil coolers 3D printed for my ESM Corsair...Subtle but a nice scale touch for the Corsair...

Hi, Aros, those radiators look way cool !!!! Would you share the file ?

[TwistedGrin]

Finally able to "Re-Maiden" this bird after deploying Robart electric retracts. The stock retracts are Pheonix standard OEM from what I can tell....while the Phoenix retract housing and struts are up to task the motor actuators are sub par.....expect them to fail. I have my bird set up with 24x12 XOAR prop, Admiral GP60 160Kv motor, Castle 160 ESC, dual 100c 8000mAh 6s LiPo for 12s power, 3200mAh LIFE batt for radio, 2s 2200 20c LiPo for retract battery, Aura 8 stabilizer, Hitec HS645Mg servos all the way around. My build required me to fabricate stand offs to use the short motor box with this motor then add 1lb of lead onto the motor box (diver belt weight) for proper CG.

The bird is super smooth and very powerfull, nice sound at anything above 50% throttle and litterally screams at 85% throttle. It lands ubra smooth like a butterfly with sore feet. It could be considered a trainer plane in this configuration.

I discovered the plastic faux motor is collapsing onto the motor and grinding it down....most likely the reason for the 5min flight times....should be around 8min cruising. Pretty sure if the grinding was not present it would have minimal 7min flight times. I will order another faux motor if Motion has them available and perhaps move the cowing forward ...but it just clears the prop now!!

I observed that I had way too much expo...this was noted on my maiden on May 28th......Three excellent flights today removing more expo every flight....down to 35% all surfaces....mixed throw settings to my style of flying.

The Robart retracts worked everytime and my springs holding the number plates on the struts worked without issue.

Very pleased with this bird....easy relaxing giant with gobb loads of reserve power

Winds in the video are 7-10mph gusting to crosswinds....Greater Southwest Aero Modelers of Fort Worth Texas AMA 1140 (FRIA)....temps at or near 99degrees on our grass field.

https://youtu.be/CQwR4hsBjEE

TwistedGrin

[TwistedGrin]

Here is how I have deployed the strut number plates to the Robart retracts.....springs and wire. May not last very long but works fine on the bench. Photos attached.

While extending the main gear...the stock tailwheel retract motor couple failed. It is very cumbersome to remove the tailweel retract...and another PIA to repair the motor/scew coupling. I am pretty sure Blackhorse is shipping with Phoenix retract motors and screw assemblies. Motion RC has not had the motors in stock .....I ordered the Robart electrics and set them into the wings.....about $600.00....if Motion had the motors in stock it would have been a $25.00 repair at least the first time.

Here are two video's of the tail wheel system......the first is the failure the second is the full range motion. The mains are using the same system.....of course the Robarts are of much higher quality!!

https://youtube.com/shorts/iq9AzRMgiYM?feature=share

https://youtu.be/pBFcNgcRz70

[TwistedGrin]

I wound up cuitting off the captive peg from the strut and using the number plates with the original stand off slider. That slider its and stops perfectly on that pin seat. I attached a small spring to the strut and strut plate with a wire to each. The spring keeps the strut plate on to the strut in both retracted and deployed positions. Hopefully my springs have enough strength to hold them in place during flight!

TwistedGrin

[Rccen44]

This is the way I attached my strut number plate. (Post #86) Small block of hard foam and a loose fitting strap made from small zip tie.

[TwistedGrin]

The Robart 148E retracts and struts are a perfect match...they do fit but need modifications to get them mounted.....
1. The Retract housing side plate bolt hole are perfectly aligned with the most forward and rear bolt hole alignments...no modifcations
2. The Motor actuators move with as the gear transit up and down....the rib that runs under the actuator will need trimming out to clear the motor and its motor wire
3. The sides of the retract wing mounts will need reaming out "Dremmell with sanding drum" to provide clearance for a couple side bolts and the rotating axle of the retract...in order to seat
4. The entire retract strut sits much lower into the wing than the stock set up....I used two popsickle sticks under each of the mounting rails of the retracts to raise the retracts
5. The stock wheels are nice and fat...but they prevent the retracts from closing all the way unless step #4 is done to allow enough clearance for proper function
6. The stock wheel bearings will need drilling out for and SAE 1/4 diameter bolt (Robart Supplied) that work with the retract threaded axle hole
7. The stock wheels will need an SAE 1/4 20 nut on the inside for spacing (use the supplied Robart nut as the inside spacer)....this will also be a jam nut to help keep the axle held in place
8. A standard SAE 1/4 nut should also be used on the exposed threads left on the open side of the Robart strut axle hole
9. Use the Robart Toe-In adjustment to align the wheels as noted for proper tracking
10. The Robart Electric Retract controller board does in fact work with the stock "Phoenix" tail wheel retract when using a 2s 7.4v LiPo battery as a separate power supply to the retract controller
11. The stock retract strut number plates will need some kind of custom solution ....perhaps a fixed attachement instead of the sliding claw configuration
12. The Robart retracts are slightly heavier....but I forgot to weigh them for certain
13. The Robart retracts do extend slightly over90 degrees thus the wheels are more forward than the stock gear in down position
14. You will need at least one Robart Retract servo wire extention for each wing.

TwistedGrin

[Rccen44]

I would still like it even if all I could do is listen to it run.

[TwistedGrin]

I could swear that sound is a Ducati Desmosedici RR reving up......it's the same .....awesome
TG

[Rccen44]

Just a couple of laps with the Corsair after a carb adjustment.

https://m.facebook.com/story.php?sto...81308&sfnsn=mo

[TwistedGrin]

Gents - I think the Robart Electric 90degree rotating 148E is the set that should fit both the Phoenix and Blackhorse model 60cc Corsair.

The Width of the 148E sideplates match @ 1 1/16th inch stock set
The length from the Axle to the rotator pin matches @ 7 1/4th inch stock set
The BH flange mounting bolt holes will not line up on the pre-drilled Robarts but that only takes drilling out the Robart flanges to match.

Not sure the axle size will fit the stock wheels which are excellent....looks like the Robart struts require threaded axle 1/4th inch bolt.

I am wondering if the Robart actuator motors could be a swap out....that would be insanely nice.

https://robart.com/collections/retracts-by-aircraft-weight-12-24lbs-rotating-electric-conversion-kits/products/148-electric-conversion-kit

TwistedGrin

[Aros]

Great maiden report, glad to hear it was a success! If you can afford the Robarts I would go with those. Never had an issue with Robart electric retracts.

[Twowingtj]

Congrats on the maiden! Great write-up. A bit of a bummer about the retract.

Sounds like the Admiral GP60 performed pretty good. I just installed one in a Hangar 9 60cc XCub assembly.

[TwistedGrin]

05-27-22 Maiden flight report:
Cross Winds at or near 8-10MPH
Aura 8 Stabilizer engaged at or near 3%
DX8Gen2 Transmiiter Mid Rates and Expo
GSWAM AMA1140 Field Manicured Grass Fresh cut short nap bermuda thatch

The take off was smooth effortless....initial turn from take off was very mushy as if the rudder did not have any authority.....I was a little low on the throttle at or near 50%.
Second pattern required some up elevator...about 10 DX8Gen 2 clicks.......no other trim was needed...still at 50% throttle.
Third and Forth pattern added throttle from 50% to 60% the aircraft seemed to respond much better.
Fifth pattern added throttle from 60% to 70% and set for cruise.....flipped to high rates and found over sensitive elevator....toggled back to mid rates
Sixth pattern deployed take off flaps.....no climb or dive observed......deployed full flaps.....no adverse climb or dive observed....toggled flaps up for normal flight
Seventh pattern made for a high speed pass at or near 80% thottle....the bird pick up speed with an excellent prop song......backed off throttle for the turn off of straiff run
Eighth pattern dropped landing gear
Ninth pattern toggled take off flaps down wind.....followed with full landing flaps set up for landing
Landing approach wings level decending in shallow 75 yards in at 5ft from grass to allow the aircraft to land smoothly at nice slow speed....perfect soft touch down....easy greasy.
Right retract folded back during runout....3ft skid to soft stop....zero damage

The Electric Retract actuator motor gear that turns the truion screw is stripped internally. Motion has the part listed for $24.00 but not in stock. Motion has the entire (L&R) electric retract unit listed for $250.00 but not in stock. Phoenix has electric retracts listed for both sides left and right for $125.00 pre- shipping....but will not ship. Robart #148E 90 deg Electric Rotating Retracts 1/5 Scale with controller box plus assorted cables total with shipping $542.00.

It should be a nice flying model but the electric actuator motors are the weakpoint....the retract themselves are very sturdy. I have the failed retract bolted to down position fixed in order to fly this bird wheels down until the Robart retracts arrive.

The weathered covering design looks excellent in the air....very realistic. The aircraft tracks nice after speed is applied.....it will lope around but will feel lethargic and mushy. I did dial up the Aura8 stabilizer to about 50% before engaging flaps and kept that setting for the rest of the flight......it tracked perfectly and turned with smooth lines.

Looking forward to diailing this bird in with more flights

5min20sec mixed throttle.....landing at or near 3.81v per cell. Dual 6s/12s 100c 8000mAh LiPo. Admiral GP-60 motor. Avain 160amp ESC. XOAR 24x12 PJN prop. Aura8 Receiver via Spektrum dual antenna. 3200mAh LiFe receiver battery. 2600mAh LiPo retract power battery.

TwistedGrin

[TwistedGrin]

The crazy winds .....nearly dead calm for 5minutes then a sustained puff out of nowhere at 15-20mph.....and ya at the most critical moment of handling!!!

No maiden and for good reason

TwistedGrin

[OV10]

He's just visualizing what a port knife edge from a third person perspective looks like LOL

[Twowingtj]

Looks good!

[TwistedGrin]

Have you hugged your Corsair lately?

TwistedGrin

[TwistedGrin]

Taxi test and general inspection at the field......found my throttle cut needed tweaking on transmitter settings....the landing gear showed no signs of weakness running up and down the field. I'll get the maiden in as soon as I get some much needed flight time logged as soon as these blasted winds and rain pass.

The covering design works for me......I had never observed it in the open and at the field in the sun. It looks great.

TwistedGrin

[davegee]

TwistedGrin how do you feel about the weathered covering? I've heard both ends. Cheesy to very cool.

I'm also disappointed in the "cartoonish" weathering patterns. For my money, I would much prefer it had been clean to where I could add my own weathering techniques. But that's just me. I'm not buying one, at least at this point. I like its size and it looks good in the air. If someone likes the way it looks, more power to him.

davegee