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New BVM F-18

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New BVM F-18

Old 02-13-2018, 06:32 PM
  #176  
n715tm
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All, this is a picture of my jet from the factory. I was able to order this one from Patty a couple weeks ago. Not sure if someone cancelled their order for this jet and I lucked into it or not. Regardless, I was told the jet should ship soon after the factory opens back up in mid-march. FYI, Photo properties indicate the photo was taken on 12/21/17.

Thanks, Tobin
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Old 02-24-2018, 01:22 PM
  #177  
patniven
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Andy, I hope that's not your jet in the pic above!
Old 03-10-2018, 02:09 PM
  #178  
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Has anyone received an update from BVM? Iím on my second request for info?
Old 03-11-2018, 11:47 AM
  #179  
bidrseed2
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I think you can ask BVM for an update as often as you like, but given the jet legend factory is shut for chinese new year, its not going to get you anywhere.


PS I'm waiting for one too, so i feel your pain
Old 03-11-2018, 03:46 PM
  #180  
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Originally Posted by bidrseed2 View Post
I think you can ask BVM for an update as often as you like, but given the jet legend factory is shut for chinese new year, its not going to get you anywhere.


PS I'm waiting for one too, so i feel your pain
They started back up last week ( this is according to BVM). The factory never responded to the first request after everything was back up and running so they sent another request.
Old 03-22-2018, 07:35 AM
  #181  
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Well I'm happy to report that Patty called on Tuesday to offer another F18 that was close to my original order so I took it and it was delivered two days later (Fast shipping from FL). As you can see in the pics it was well packed. It only was damaged on the left wing root and on the left wing intake (see pics). I look forward to going through her to prep her for her maiden. Also of note, in the BVM manual, they state that you need to buy a UAT since it doesn't come with one. To my surprise, one is already installed (I'm still planning to use a highflow UAT). Enjoy





Light Ply Protection



Damage


Damage









Last edited by leemkl06; 03-22-2018 at 07:52 AM.
Old 03-22-2018, 09:44 AM
  #182  
FalconWings
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A damaged package from BVM...... I thought I would never live to read something like that.
Old 03-22-2018, 10:54 AM
  #183  
bidrseed2
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I’m very jealous that yours has arrived, and it’s making me wish I’d ordered that scheme.

apart from the damage, what are your first impressions?
Old 03-22-2018, 11:04 AM
  #184  
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I clearly see that JetLegend hasn't learned the concept of Military Flat colors.
Old 03-22-2018, 11:09 AM
  #185  
bidrseed2
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Anyone got a recommended technique to easily take the shine off?
Old 03-22-2018, 01:09 PM
  #186  
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Originally Posted by FalconWings View Post
I clearly see that JetLegend hasn't learned the concept of Military Flat colors.
Funny you say that! The one I ordered was a Diamondback with Flat paint but if I wanted that one, I would of had to wait and additional 5 to 6 weeks (its already been 14 weeks). I decided that I would just live with the gloss
Old 03-22-2018, 03:06 PM
  #187  
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I finally removed the tanks to inspect the install and change the lines and clunks. As you can see, we have two mains and a smoke tank. One item of note was the debris inside the tanks. I'm not sure what it is but the tanks will be well cleaned before they go back in!!!! Also note the lenght of the line, I personally feel that this current setup could easily get caught in the front of the tank and cause issues.








Old 03-23-2018, 06:41 PM
  #188  
Doug Cronkhite
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Originally Posted by leemkl06 View Post
Funny you say that! The one I ordered was a Diamondback with Flat paint but if I wanted that one, I would of had to wait and additional 5 to 6 weeks (its already been 14 weeks). I decided that I would just live with the gloss
Easy enough to just give it a coat of flat clear..
Old 03-23-2018, 06:58 PM
  #189  
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Really fine sand paper or scuff pads on gloss will dull it from what I hear. I would def add a piece of aluminum tubing to the clunk line to prevent the clunk getting stuck forward.

Last edited by FenderBean; 03-24-2018 at 01:42 PM.
Old 03-23-2018, 10:08 PM
  #190  
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Iím afraid a 200N turbine is way over powered for this airframe. You see this F-18F is the same as the BVM/TAMJET one ( same molds ) with lots of updates in structure, landing gear etc ,all at a significantly lower weight. We test flew ours for a few hours with different power settings , started at 140N and went up to 180N.. we felt that that was the top power rating this airframe can be safely be operated at without possibly over stressing the structure through various manouvers , we took an as close as possible look at how much are the wings flexing at high G manouvers and yet keeping the ability of the model to do a quick landing abort ( fast energy response) stil if needed.
From our experience 160N ( is roughly what you get at 32 degree centigrade at 1000 feet above sea level from a P-180RXI) is where one would want to be with this airframe.
Old 03-24-2018, 04:01 AM
  #191  
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Originally Posted by lavi rider View Post
Iím afraid a 200N turbine is way over powered for this airframe. You see this F-18F is the same as the BVM/TAMJET one ( same molds ) with lots of updates in structure, landing gear etc ,all at a significantly lower weight. We test flew ours for a few hours with different power settings , started at 140N and went up to 180N.. we felt that that was the top power rating this airframe can be safely be operated at without possibly over stressing the structure through various manouvers , we took an as close as possible look at how much are the wings flexing at high G manouvers and yet keeping the ability of the model to do a quick landing abort ( fast energy response) stil if needed.
From our experience 160N ( is roughly what you get at 32 degree centigrade at 1000 feet above sea level from a P-180RXI) is where one would want to be with this airframe.
Since Jet Legend did all of their prototype test flights and videos with a 180, I felt it was fine to install a 180 sized can ( actually the Merlin is smaller in Dia and length plus a ton lighter than the P180) turbine and fly it turned down to somewhere between 170 and 180. Either way, iíll provide some feedback after the maiden.

Last edited by leemkl06; 03-24-2018 at 04:05 AM.
Old 03-24-2018, 04:19 AM
  #192  
lavi rider
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So you choose a turbine according to its physical dimensions? The P-180RXI is the same size . I was talking about thrust my friend........
i hope all goes well with you tests , good luck.
Old 03-24-2018, 06:21 AM
  #193  
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Originally Posted by lavi rider View Post
So you choose a turbine according to its physical dimensions? The P-180RXI is the same size . I was talking about thrust my friend........
i hope all goes well with you tests , good luck.
ďand fly it turned down to somewhere between 170 and 180Ē
Old 03-24-2018, 07:21 AM
  #194  
lavi rider
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Good
Old 03-24-2018, 11:15 AM
  #195  
bidrseed2
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Lavi,

How did you determine 180N was the max? Did you fit cameras to the wings and review the footage?

Ill need an engine for mine, and the merlin 200 would be my first choice, and then detune it, OR program a mixer so that 200N is only available with the flaps out.... for example.

That is of course if the pipe is rated to 200N.
Old 03-24-2018, 12:07 PM
  #196  
lavi rider
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I have over 40 years of experience in this hobby 21 of it in turbine powered models that eventually became my profession. No need to fit a camera on the wing to observe the flex if you’re flying close enough, beside one can calculate the force on a lifting surface considering , weight, speed and radius of turn at given angle of bank..
The exhaust is to my belief not suited for 200N thrust . The outlet diameter is quite small .. we suspect at 200N it will eventually fail . Reason for that is due to relatively small outlets the excess energy will turn into heat build up.
keep in mind the exhaust made by Tam for the yellow aircraft twin F-18 has a 65mm inner diameter for a 200N thrust turbine VS a 50mm inner diameter for a 160N thrust turbine...
The Y/A F-18 is 2.75 m long and weigh some 17KG dry if built light .
This small F-18F is 2.35 m and weigh 14.5 Kg .
Even with 180N turbine is almost a 1/1 thrust to weight ratio .. absolutely unnecessary, but we did test it and it handled well .
We started at 145N thrust setting which was well enough for really scale like flying .
Old 03-24-2018, 12:11 PM
  #197  
lavi rider
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The owner of Jet legend was my guest here in Israel for two weeks when we tested the new F-18F PNP along with a 1/6 Scale F-16 that he shipped to us prior to his arrival here .
Old 03-24-2018, 12:17 PM
  #198  
lavi rider
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Default F-18f pnp bvm

Here are photos of the Y/A twin 200N pipe compared to the PNP F-18F pipe ...




Old 03-24-2018, 12:32 PM
  #199  
lavi rider
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Sorry not 2.35 m long but 2.25 m long and even on the official BVM site top power rate is 36lb thrust . If you trust BVM better listen to what they suggest .
As stated here we fly ours at 180N which is close to 16kg thrust at 32 degrees 1000ft above sea level..
Old 03-24-2018, 01:45 PM
  #200  
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From what I have seen when this jet flew at Ky jets the 160 class turbines are more than adequate.... it’s a very light airframe and even if it had all the wing stores/tanks on it the max I personally world go is 180 and even then you would probably be half throttle most of the time.

Last edited by FenderBean; 03-24-2018 at 01:48 PM.

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