What would pick as the best turbine for bvm viper
04-30-2017, 09:28 PM
#1
What would pick as the best turbine for bvm viper
Not a viperjet. The old original bvm viper. Just made a deal on a really nice one. Should have it in a couple weeks. I'll likely fly it a few times with the original kbv82 for old time sake but would like to put a turbine in. Is there a conversion kit for a viper out there? Would a k45 be enough or a k60 be better?
05-01-2017, 01:16 AM
#2
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I had a Mercury in mine, I think I was the first one to convert it. No issues, but the LG mounts were too weak for the extra weight. Today, I'd put a 60 size in it for great performance, a 45 would be Ok too...Just make sure your LG mounts and retracts are serviced and in good condition.
05-01-2017, 02:04 AM
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I Like the sound of this, I have a couple of Vipers of which one is complete and under restoration and the other is a kit. I plan to fly mine on a Nelson/BVM 91 with Viojett fan but a small turbine has crossed my mind. It may just be a bit on the small side, will be interesting to see how yours works out. Do you have any pics of yours?
05-01-2017, 07:43 AM
#6
I haven't got the jet yet. It's a long time friend of mine who built it probably in the late 80's and finally decided to let it go after not flying it for the past 18 years. No idea on tanks or otherwise yet. There will be a fair bit of checking things over to do I'm sure. It's flown many times but nothing more than a collapsed nose gear ever for damage.
05-01-2017, 08:47 AM
#7
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Gary mueller from jet tech turned a bvm f-16 (the original little one) sized centerline tank into a useable fuel tank that holds 78 oz as I recall. I had one back when and it was awesome. That might be a great way to squeeze some gas into that plane. The tank has a flat-ish crosssection so it would work with low ground clearance as well. I think a bunch of guys used them on converted mavs and such. Plus Gary is a great guy to deal with as well
Dave
Dave
05-01-2017, 12:34 PM
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Jeremy,
Exactly which version of the BVM Viper do you wish to convert to turbine power? There was the original Viper, which can be identified by its one-piece wing and belly hatch. This version used special BVM saddle tanks- about 9 oz capacity each- squeezed into the fuselage. The later Ultra Viper version used plug-in wings, a wider fuselage, for standard Sullivan DF-11 fuel tanks. This fuselage was shared by the Aggressor III, Maverick and Mav-Pro. Both Vipers utilized flaperons which were a bear to setup correctly before computer radios. The Ultra Viper would be preferred for turbine conversion and even so it would be a major effect. As a point of reference, I converted an early DL Cyclone from Dynamax/ K&B 82 power to a FTE-500 turbine-similar to the RAM 500. I had to literally re-engineer the entire model to fit sufficient fuel for a decent flight. I used 5 fuel cells, including a belly/ventral tank to provide about 50 oz of fuel. I flew the conversion for several years but it always took a beating due to its weight and lack of flaps for landing ease. I'd recommend one of the newer turbines, with kero start, integrated solenoids, a mini ECU of at least 10 lbs of thrust. Good luck and let us know how you make out.
Rgds,
Art ARRO
Exactly which version of the BVM Viper do you wish to convert to turbine power? There was the original Viper, which can be identified by its one-piece wing and belly hatch. This version used special BVM saddle tanks- about 9 oz capacity each- squeezed into the fuselage. The later Ultra Viper version used plug-in wings, a wider fuselage, for standard Sullivan DF-11 fuel tanks. This fuselage was shared by the Aggressor III, Maverick and Mav-Pro. Both Vipers utilized flaperons which were a bear to setup correctly before computer radios. The Ultra Viper would be preferred for turbine conversion and even so it would be a major effect. As a point of reference, I converted an early DL Cyclone from Dynamax/ K&B 82 power to a FTE-500 turbine-similar to the RAM 500. I had to literally re-engineer the entire model to fit sufficient fuel for a decent flight. I used 5 fuel cells, including a belly/ventral tank to provide about 50 oz of fuel. I flew the conversion for several years but it always took a beating due to its weight and lack of flaps for landing ease. I'd recommend one of the newer turbines, with kero start, integrated solenoids, a mini ECU of at least 10 lbs of thrust. Good luck and let us know how you make out.
Rgds,
Art ARRO
05-02-2017, 08:09 AM
#12
Wish I could edit my thread title, terrible grammar........ Can't find the edit button anywhere though.
Anyway, This is an early Viper, one piece wing that bolts on from underneath. Definitely not the ultra viper. I am not an electric guy but I did even look at the EVF system, I'll go turbine, it's far less money! If I had the batteries, chargers, etc etc etc already it MIGHT be a consideration but the EVF system is only $50 less than a brand new K45. Just can't see myself spending turbine money for vacuum cleaner internals LOL
Anyway, This is an early Viper, one piece wing that bolts on from underneath. Definitely not the ultra viper. I am not an electric guy but I did even look at the EVF system, I'll go turbine, it's far less money! If I had the batteries, chargers, etc etc etc already it MIGHT be a consideration but the EVF system is only $50 less than a brand new K45. Just can't see myself spending turbine money for vacuum cleaner internals LOL
05-02-2017, 08:53 AM
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Jeremy,
On the early Viper you need to engineer the space for the fuel, and turbine accessories-ECU/solenoids/fuel pump/etc. A belly/ventral tank would be a hassle with the bolt-on wing from underneath although it may be possible for a one-piece model. I had to fabricate extra hatches on my Cyclone conversion. I have an early Aggressor I/II which I thought of converting to a Wren 44K but it was just too much hassle. Also, have a BVM EVF/10S Lipo system but I'll probably fly the model as a glow DF version as a nostalgia jet.
Rgds,
Art ARRO
.
On the early Viper you need to engineer the space for the fuel, and turbine accessories-ECU/solenoids/fuel pump/etc. A belly/ventral tank would be a hassle with the bolt-on wing from underneath although it may be possible for a one-piece model. I had to fabricate extra hatches on my Cyclone conversion. I have an early Aggressor I/II which I thought of converting to a Wren 44K but it was just too much hassle. Also, have a BVM EVF/10S Lipo system but I'll probably fly the model as a glow DF version as a nostalgia jet.
Rgds,
Art ARRO
.
05-02-2017, 12:13 PM
#16
Honestly I'm not familiar with the lineage but I'm guessing original viper. one pce wing. I modified it to have separate flaps and ailerons but that's about it. i'll see if I have a photo of the tanks. they aren't the maverick tanks, they aren't shown on his website so email him, they were just over $200 shipped if I recall for the pair a couple years ago.
05-03-2017, 07:40 AM
#17
Honestly I'm not familiar with the lineage but I'm guessing original viper. one pce wing. I modified it to have separate flaps and ailerons but that's about it. i'll see if I have a photo of the tanks. they aren't the maverick tanks, they aren't shown on his website so email him, they were just over $200 shipped if I recall for the pair a couple years ago.
Thanks
Jeremy
