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BUSA Fokker DVII

Old 04-29-2009, 06:26 PM
  #301  
jeffEE
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Default RE: BUSA Fokker DVII

well, here it is ready for the first flight. So of course its going to rain for the next 3 days! It came in at 22 lbs.
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Old 04-29-2009, 07:02 PM
  #302  
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Default RE: BUSA Fokker DVII

Beautiful. I really the color scheme. Very nice.

Sean
Old 04-29-2009, 10:08 PM
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Default RE: BUSA Fokker DVII

Great job. Looks like it will fly very well. What engine again?
Old 04-30-2009, 04:08 PM
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Default RE: BUSA Fokker DVII

I am going to try my Saito 2.20 four stroke. I am not sure about it. I saw one at the local flying field that has a US 41 in it, and it was a bit slow. Not to the point of being unsafe, but perhaps a bit too sacle. (if that is possible)
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Old 04-30-2009, 10:22 PM
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Default RE: BUSA Fokker DVII

No chin cowl yet? I fly mine with a G38. It needs to be optimized some for a little more power. To be honest, if I were to do over I would put a DL 50cc in it. The 220 should work well though. Anything that will spin a 20" prop strongly is about right.
Old 05-03-2009, 09:31 PM
  #306  
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Default RE: BUSA Fokker DVII

Yep, you were right about the 2.20. It flew the plane at a good scale speed at 2/3 throttle. Take off was VERY short, and thanks for the warnings about needing a lot of down trim. I put a bit in before the flight, and was ready to add a bunch more. By the time I made my first lap, it was flying hands off. It sure looks good in the air. All smiles here. There is a chance that at the field on Tuesday, there will be 2 DVII's and 2 Tri-planes. All Balsa USA and all 1/4 scale. should be a good photo op! Thanks for all the help everyone.
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Old 05-13-2009, 08:36 PM
  #307  
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Default RE: BUSA Fokker DVII

I think the Newport is in trouble. [>:]
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Old 12-23-2009, 06:14 PM
  #308  
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Default RE: BUSA Fokker DVII

I just bought one of these BUSA 1/4 DVII's used for $375. As far as I know it has never flown but the engine has been ran. It has an OS 3500 swinging a 20x10 APC prop.

I have read through the entire thread and will check on all the stuff mentioned so far such as CG and incidences.

What can you tell me about the flying characteristics of the 1/4 D VII.

Thanks
Old 12-23-2009, 06:46 PM
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Default RE: BUSA Fokker DVII

Very easy flier. Replace the Axel with solid 1/4" music wire. Have toe in. Use a lower pitch prop if possible like a 21 or 22-8 Or even a 23-24 x 6
Old 03-15-2012, 03:38 PM
  #310  
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Default RE: BUSA Fokker DVII

I hope someone will see this post , being that it is a little old. I'm about to finish my BUSA Fokker D7 also. I've built it around a Zenoah G38, which seems to be the engine of choice. My plane is about 20 lbs, BUT this plane is MASSIVE! The same engine could not haul my Spad XIII. I've talked w/ a bunch of D7 owners and they have a lot of success using the G38. My question is performance. My engine is relatively new and using a 20X6 prop can barely hit 6,200 RPM!!! Most of the guys I talked to are using a 20X8 prop, but are not sure of the RPM rating. Can anyone out there (w/ success flying their D7) tell me the prop size AND RPM of their G38!? I also understand that the OLDER version of this engine can hit higher RPM's. (older version being the one w/ the metal prop shaft w/o a choke). Any truth to this?

Thanks,
Ray.
Old 03-15-2012, 04:23 PM
  #311  
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Default RE: BUSA Fokker DVII

I am using a 19-8 Xoar. I cannot tell you the RPM, but this size really woke up performance over the 20-6 props I was using. I think the Zenoahs like to turn up the RPM. I bet an 18" prop would be a good choice as well. To be honest, I would not put a G38 in another DVII. I feel mine is underpowered.
Old 03-23-2012, 03:10 PM
  #312  
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Default RE: BUSA Fokker DVII

Must be your thin air. My Saito 2.20 fourstroke is turning a Xoar 20 x 8 at 7500 top end. But I never fly it at that speed. About half throt is all I ever use.
Old 03-23-2012, 06:54 PM
  #313  
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Default RE: BUSA Fokker DVII

I fly my BUSA D-VII with a G-38 and a ZDZ 20 x 8 prop. I do not know the RPM of my motor, it is one of the older ones. The plane flies all day at 1/2 throttle. I think the prop of choice for the newer G-38 is an 18 x 8. The G-38 is the right engine for this airplane.

Wild Bill
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Old 01-12-2014, 03:11 PM
  #314  
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This is an old thread, but I have something exciting possibly for anyone interested in this plane. I just placed an order with a company that is going to 3D print the radiator mesh for me. I just ordered a 3/8" sheet, that I can use to replace the wire mesh in my cowl. This will have the scale sized hexagon pattern. I am having it drafted out of black material, making it easier to paint and maintain a good color.
The price was extremely reasonable. As soon as I get these parts, I will post my progress and provide info on how to obtain this material. The 3D printing is a great solution to many of our scale detail needs. This has been an item I have needed for years to really finish off my Fokker.
Old 01-12-2014, 06:58 PM
  #315  
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Hay this is great news I have been looking for something to do radiators foe some time, please let us know how it goes and perhaps the costs involved.
Old 01-12-2014, 07:25 PM
  #316  
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Originally Posted by Mcubed View Post
Hay this is great news I have been looking for something to do radiators foe some time, please let us know how it goes and perhaps the costs involved.
I can promise you that what I have ordered is very reasonably priced. I have searched hi and low for many years, and this is a very promising option.
Old 03-02-2014, 08:04 AM
  #317  
R/C Ray
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Vertical,

I have a similar setup on my D7. GTM full cockpit, done with GTM Lozenge fabric. I don't like to reinvent the wheel....I noticed that in one of your posts the your pilot was "removable". I was trying to do the same with mine. The cockpit is so fragile that I don't think I could attach the pilot to the seat. I was thinking of a platform that adjusts to grab the inside frame. How did you do yours?

Ray.
Old 03-02-2014, 08:49 AM
  #318  
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Originally Posted by R/C Ray View Post
Vertical,

I have a similar setup on my D7. GTM full cockpit, done with GTM Lozenge fabric. I don't like to reinvent the wheel....I noticed that in one of your posts the your pilot was "removable". I was trying to do the same with mine. The cockpit is so fragile that I don't think I could attach the pilot to the seat. I was thinking of a platform that adjusts to grab the inside frame. How did you do yours?



Ray.

What I did was epoxy a short section of music wire into the upper longerons on the left and right side of the fuselage. I mounted my pilot to a plywood plate. after fitting the plywood plate for length inside the fuselage, I drilled small hole in the ends of the plywood to slide up, and into the music wire. I used very small ( 1/2A) glow fuel tubing to slide up the music wire, and keep the plate/pilot in place. I have had no issues with this arrangement.

Funny, I was just in my shop mounting my Best pilots Lothar pilot in my newer DR1 tripe. While we all want full body pilots, this one is very hard to mount, and I am not even using the legs as he just does not fit in there. I think the 1/4 scale aces of Iron pilots are way too small, and serious modifications would have to be made to get a full sized Lothar into my DVII. I would have to lose almost all of my interior cockpit detail, as I did with my Triplane.

Which pilot are you using?
Old 03-02-2014, 09:02 AM
  #319  
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Here is the radiator material I mentioned before. They added it as an in stock item. http://www.iflytailies.com/store/custom-items/
Old 03-02-2014, 10:16 AM
  #320  
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Vertical,

Thanks for responding. I'm going to use the Aces of Iron, Blue Max. I looked at the "Luther" Best pilot and I'm glade I didn't order it. My D7 came in at 20lbs, which isn't bad till I had to add 5lbs to balance! I don't remember ever building a tail heaven plane this bad! I think the full size pilot would have really caused me serious CG problems. The plane flies great the only problem is that the wing strut solder joints tend to break after flight. I do fly it slow, but also do many different maneuvers. I tried "stay bright" solder and it seems to hold up better.

Ray
Old 04-03-2014, 01:29 PM
  #321  
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I posted a Picture of this on another thread here at RCU. But just in case some missed it. I put the radiator from Iflytailies into one of my DVII's. I did it fast, and on the next one I will take my time to make all the ends line up better. But for the price of two 5 inch sections, it really helps the front end on the Balsa USA DVII. Well done Iflytailies!
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Old 04-03-2014, 01:37 PM
  #322  
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Funny, I am the one that asked for the stuff, and I still have not done mine yet. I have her on the bench though and getting ready to do it. I ordered a fine tooth bandsaw blade to cut it. Waiting for that.

Looks good! Certainly better than screen material. I guess we will find out how good the cooling is?
Old 04-03-2014, 03:39 PM
  #323  
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JeffEE,

I know you guys like the product and say it's reasonable, but what is reasonable!? Does it come as a flat piece?

Ray
Old 04-03-2014, 03:47 PM
  #324  
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Originally Posted by R/C Ray View Post
JeffEE,

I know you guys like the product and say it's reasonable, but what is reasonable!? Does it come as a flat piece?

Ray
I consider $27 a real bargain for what it is. Exact scale for this plane. They come as a flat plate. They need to be cut and mitered back to fit your model. I would not want it any other way.
Old 04-04-2014, 12:41 PM
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It took two pieces of 5 x 2.5 inch. yes, the parts are flat. The parts are trimmed to fit.The cost of each was just under $10. and delivered to my door in 2 days, total was around $27. I really don't think the cooling is going to be a problem. The holes are big enough and as you can see, the blue push rod tubes of my motor are easy to see. The area of concern to me is how it will hold up to the heat of the motor. flying should be ok, but how about after the flight sitting on the ground when no air is passing thru it and the motor is still hot. Time will tell. I think this would be a great thing to have during the build, and not have to retro fit it. Then the installation would be cleaner. It's very hard for me to have to carve into a perfectly good cowl.

Last edited by jeffEE; 04-04-2014 at 12:47 PM.

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