F-4 flyers
01-05-2006, 03:46 PM
#26
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RE: F-4 flyers
My JHH F-4 has about 10 flights before the season closed; so now I get to finish painting. Below are a couple of of shots ; in flight bare & base coat on. It has twin 90mm elec. fans that put out over 9-bs of static thrust for lift off weight of 12-lbs (batteries included). Flies great at current wing & power loading. I combined the flaps & aileron into flaperon control with programmed mix for up elevator when flaps deployed.
@Mdurand, I updated the wing construction in 3-ways since the design was originally from late 70"s. I capped the middle & rear spars with BVM 1/4" graphite tapes the full inner wing panels, with 3/16 dowels at about 1" interval outside where the ply spars end. Also laminated graphite along top as shear web but also transmit airload bending thru center section of wing. lastly, I replaced the bottom shape of the spar to match the belly pan more closely, then glued it on to spars so it now takes the bottom tensile stress instead of being dead weight & just going along for aesthetics. I'm attaching a pix of the spar. I'd use proper woven graphite cloth to laminate, especially at the center section but I only had the tapes. It should now be strong enuf for 200mph turbine application.
@Mdurand, I updated the wing construction in 3-ways since the design was originally from late 70"s. I capped the middle & rear spars with BVM 1/4" graphite tapes the full inner wing panels, with 3/16 dowels at about 1" interval outside where the ply spars end. Also laminated graphite along top as shear web but also transmit airload bending thru center section of wing. lastly, I replaced the bottom shape of the spar to match the belly pan more closely, then glued it on to spars so it now takes the bottom tensile stress instead of being dead weight & just going along for aesthetics. I'm attaching a pix of the spar. I'd use proper woven graphite cloth to laminate, especially at the center section but I only had the tapes. It should now be strong enuf for 200mph turbine application.
01-05-2006, 03:58 PM
#27
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RE: F-4 flyers
This is my favorite jet in my entire fleet BVM F-4 powered by JetCat P-70 
I still respect this jet like no other, one flight on my F-4 feels like 5 flights on anything else.
Johnny Hernandez
I still respect this jet like no other, one flight on my F-4 feels like 5 flights on anything else.
Johnny Hernandez
01-05-2006, 06:51 PM
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RE: F-4 flyers
Johnny,
Beautiful F-4 ya got there(Jolly Rogers is my favorite Navy scheme) My new SM F18F will be finished in that scheme as well along with full ordnance
You say your F-4 is powered by a Jetcat P-70??I thought that BVM reccommended atleast 22 lbs of thrust?I'm curious how respectable it flies on 16.5 lbs of thrust....No pun intended-just curious
Steve
01-05-2006, 06:55 PM
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RE: F-4 flyers
He definitely typed that wrong !!
I was calling for his at LBJR and the way that plane went vertical on takeoff..... THAT AINT NO P-70 !!
Adil
I was calling for his at LBJR and the way that plane went vertical on takeoff..... THAT AINT NO P-70 !!
Adil
