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TopRC giant P-47 Thunderbolt ARF

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TopRC giant P-47 Thunderbolt ARF

Old 07-23-2022, 02:19 PM
  #301  
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Thanks. If I decide to transport it with stabs on, I will do that as well.

Got the chin scoop sanded, painted and Hysol'd it in this morning. Had to clear the top rear quite a bit for the twin exhaust, but it came out looking so much better than without it. Surprised with the detail of this arf, they don't include a scoop.




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Old 07-24-2022, 09:47 AM
  #302  
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With the DLE 111v3 this bird CG'd with 1.89 lbs on the firewall for a total weight of 41 lbs.


Small tin container lid full of melted wheel weights.


Last edited by Colt4570; 07-24-2022 at 09:50 AM.
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Old 07-25-2022, 07:31 AM
  #303  
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Maiden flight after six months of building have videos but don’t know how to post them.
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Old 07-25-2022, 07:54 AM
  #304  
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She ran a lil hot with the cowl on and the 23x14 4 blade wasn’t enough prop so I install a 28x10 2 blade and she flew a lot better but a 28x12 will be the cure
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Old 07-25-2022, 08:18 AM
  #305  
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Landing after the 1st flight she’s running hot but put five flight on her yesterday and landing gear is working good at this point
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Old 07-25-2022, 03:34 PM
  #306  
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Glad you finally got to maiden it! If you have a youtube channel, you should be able to post a link from the video in your posts.

Have a quick question for anyone who has this issue. The picture below shows where my linkage is located to the oleo cover, but you'll notice I screwed up and didn't leave enough clearance for the oleo to compress on a hard landing, and the wheel cover will probably rip the linkage right off the door.. Can someone post a pic of linkage that has enough clearance and leaves room for the gear to compress? Trying to decide whether to relocate the linkage (if it will work), or leave as is and slot the wheel cover to go around the linkage.

If I relocate the horn on the door as much as 3/4" toward the wing to clear for compression, is the geometry still going to work?

Thanks,
Darrin


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Old 07-25-2022, 08:55 PM
  #307  
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Darrin as I mention earlier this plane should’ve had more R&D and that’s one the issues. I could go on but back to your question, I did both cut a slot in my wheel cover and relocated the connecting position on my strut too keep the thing from looking like a bat wing when the gear is in the down position...But the plane flies great.you came in 2lb. Less Than my build.
Old 07-25-2022, 10:46 PM
  #308  
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Thanks, I appreciate the info!
Old 07-27-2022, 07:16 AM
  #309  
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Originally Posted by Colt4570 View Post
Glad you finally got to maiden it! If you have a youtube channel, you should be able to post a link from the video in your posts.

Have a quick question for anyone who has this issue. The picture below shows where my linkage is located to the oleo cover, but you'll notice I screwed up and didn't leave enough clearance for the oleo to compress on a hard landing, and the wheel cover will probably rip the linkage right off the door.. Can someone post a pic of linkage that has enough clearance and leaves room for the gear to compress? Trying to decide whether to relocate the linkage (if it will work), or leave as is and slot the wheel cover to go around the linkage.

If I relocate the horn on the door as much as 3/4" toward the wing to clear for compression, is the geometry still going to work?

Thanks,
Darrin

Don’t see why you couldn’t put a dog leg kink in that linkage - maybe I’m missing something in the picture?

I spent a bunch of time working out how to get my linkage so the door didn’t stick way out when open only to discover I have the same interference issue as you do - back to work! 😂

You’re so close I can almost taste it!

cheers

PaulD
Old 07-27-2022, 07:18 AM
  #310  
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Originally Posted by [email protected] View Post

She ran a lil hot with the cowl on and the 23x14 4 blade wasn’t enough prop so I install a 28x10 2 blade and she flew a lot better but a 28x12 will be the cure
Ive been looking at all these 4 blade set ups and wondering how they were going to perform. I think you answered my question….

On my Top Flite with the Saito FG60R3 I found a 2 blade 20x12 the best prop as well. They rev higher - I think I’m going to try to use a 24x16 or 18 on the UMS….

cheers,

Paul
Old 07-27-2022, 07:54 AM
  #311  
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Originally Posted by PaulD View Post
Don’t see why you couldn’t put a dog leg kink in that linkage - maybe I’m missing something in the picture?

I spent a bunch of time working out how to get my linkage so the door didn’t stick way out when open only to discover I have the same interference issue as you do - back to work! 😂

You’re so close I can almost taste it!

cheers

PaulD
Thanks for the dog leg suggestion Paul. Had some free time yesterday and hadn't seen your response yet, lol. Ended up cutting a .750" slot in the wheel cover. These are my first 2 piece gear covers with linkage, and I feel lucky they even worked when I set them up this way, lol!

I wanted to run a 4 blade as well, but opted to go with the 27x10 Xoar warbird prop to start.

Just waiting on the new 1/4-32 plug adapter for the DLE and it'll be tuning and taxiing time!









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Old 08-02-2022, 08:24 PM
  #312  
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Hey Darrin did you get that upper strut cover closer to the lower cover? Look Everyone went silent.When are you going to Maiden it? I got a chance to get in a few flights on my Ki 43 Oscar today with the Saito FG 90 with Ray English magic on it with a 24x12 prop thing flies like a dream.
Old 08-03-2022, 08:49 PM
  #313  
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Originally Posted by [email protected] View Post
Hey Darrin did you get that upper strut cover closer to the lower cover? Look Everyone went silent.When are you going to Maiden it? I got a chance to get in a few flights on my Ki 43 Oscar today with the Saito FG 90 with Ray English magic on it with a 24x12 prop thing flies like a dream.
No, mine's gonna be a bat, lol. I've got some Revoc bags and the new 1/4-32 plug adapters in the mail. They should be here in a week or less. First trip out will probably be in a little over a week and will be sans cowl for tuning and taxiing. Hopefully maiden shortly thereafter. I'll have somebody get some video! The Oscar sounds like fun.
Old 08-06-2022, 07:05 AM
  #314  
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Finally got mine finished; all that is left to do is set the CG on it and fire up the Quadra 100 and get it tuned in; been a lot of headaches along the way but I think it came out looking great.
I put a coat of clear matt over the plane, so the nomenclature stickers weren't so shiny; it seems to have done the job.









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Old 08-06-2022, 08:18 PM
  #315  
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Looks great Mike. Hope to see some video soon! Love that 4 blade.

Took mine to the field today and got it tuned up. Brought it home and did a little baffling of the engine to make sure it doesn't get too hot with the cowl on. Maiden planned for next week.


Old 08-07-2022, 03:19 PM
  #316  
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Looks beautiful amigo. I just received mine also. Love the 4 blade and can’t wait to do the same
Old 08-07-2022, 08:59 PM
  #317  
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Maidened mine yesterday, flew great. Ums150 25x14x4 42lbs. Book CG is spot on neutral.
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Old 08-07-2022, 09:31 PM
  #318  
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Nice! Glad it went well. Great B&W photo.
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Old 08-08-2022, 09:18 AM
  #319  
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Hey Mudflap did you do any videos and did you’ve any over heating problems.

Last edited by [email protected]; 08-08-2022 at 09:20 AM.
Old 08-18-2022, 08:59 PM
  #320  
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Originally Posted by [email protected] View Post
Hey Mudflap did you do any videos and did you’ve any over heating problems.
Hi Charlie,
Although most of the club had their cameras aloft ive not seen anything other than the take off. Ill get a vid somehow.
the engine did seem hot after i landed, but performance did not waiver in the air. I have opened the scoop at the back of the fuz to let more air out. Hopefully ill get another chance to fly it on sunday...
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Old 08-19-2022, 02:56 PM
  #321  
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Hey Mudflay

Hope I can get out on Sunday also because I Cut my cowl ring out on each side to let more air out to keep the 150 cool. So give me your opinion on the UMS150 how did it perform for you and what prop are you using?
Old 08-19-2022, 09:39 PM
  #322  
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Originally Posted by [email protected] View Post
Hey Mudflay

Hope I can get out on Sunday also because I Cut my cowl ring out on each side to let more air out to keep the 150 cool. So give me your opinion on the UMS150 how did it perform for you and what prop are you using?
i noticed a lot of warm air exiting through the hole in the firewall through the center of the ums150 mount, hopefully the lower rear scoop will help that get sucked out. I have not touched the cowl ring.
i was recomended the biela 23x14x4 blade which i tried but was getting 5400 on the ground. Not wanting to exceed 6000 rpm in the air i changed to 25x14x4. This gives me 4300 on the ground, i flew it with this prop.
take off was swift, it had good speed in the air (not reno style though), upline was pretty good but i can tell the engine is loaded. Landing was a breeze with half flap she floated in
Cg as per book is spot on neutral, it flys very nicely.

Last edited by mudflap31; 08-19-2022 at 11:51 PM.
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Old 08-20-2022, 07:46 AM
  #323  
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Originally Posted by mudflap31 View Post
…Not wanting to exceed 6000 rpm in the air i changed to 25x14x4. This gives me 4300 on the ground...
Slightly off topic - Perhaps respond on the UMS thread?

Curious if the 25x14x4 is also Biela?

The reason I ask is I've tried the Biela and the SEP 4-blades on other radial engines. I've found that the SEP more efficient design and lower mass generally fly better.

Hoping to get 25x14x4 SEP or 24x16x4 SEP flight report or telemetry feedback on P-47 fitted with UMS-150. Perhaps 26x14x4 SEP might be suited for this engine/model combo?

I have both SEP & Biela for my UMS-250, Moki S250 & S215 and in all cases, the SEP fly better while the Biela look more “scale”.

Last edited by marksp; 08-21-2022 at 05:23 AM.
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Old 08-21-2022, 03:44 PM
  #324  
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Originally Posted by marksp View Post
Slightly off topic - Perhaps respond on the UMS thread?

Curious if the 25x14x4 is also Biela?

The reason I ask is I've tried the Biela and the SEP 4-blades on other radial engines. I've found that the SEP more efficient design and lower mass generally fly better.

Hoping to get 25x14x4 SEP or 24x16x4 SEP flight report or telemetry feedback on P-47 fitted with UMS-150. Perhaps 26x14x4 SEP might be suited for this engine/model combo?

I have both SEP & Biela for my UMS-250, Moki S250 & S215 and in all cases, the SEP fly better while the Biela look more “scale”.
Hey Mark,

Agree, have found the SEP better/best performance on my Turboprops as well. Not sure how Biela got such a following….

Cheers,

Paul
Old 08-22-2022, 09:22 PM
  #325  
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I promised a video.

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