Hello everyone. I am fairly new to D/F jets and am looking for information. I just picked up a JHH Mirage kit from a friend. The kit has been started and so far everything looks good. The wing is mostly assembled minus the sheeting down the center. The fuse formers are all installed along with the fan mounts and intake ducting. I do not have the plans yet as JHH appears to be closed down for the holidays and the ones for my kit were lost in the shuffle somewhere. Is anyone familiar with this jet. I am installing a new K&B 7.5 and Turbax I. This appears to be a pretty big jet for a 7.5. Anyone have any flight experience with this. Also is there any pointers to look out for during construction. It is set up with elevons right now, but the instruction book shows using separate elevator and ailerons with no mention of elevons. Is anyone using this setup? I appreciate any info you can give.

I have one that isn't along quite as far as your plane. Mine has the foam wing. It looks like you have the wood wing, which wing do you have? You can tell by measuring the span. He did plans for the scale wing, as well as the sport wing. The foam wing is in between in span. what retracts do you have? I have talked to Larry quite a few times about this plane. I am building mine of the Kfir C-2 that gets you the Canards but you need plans to understand what I am talking about.
I have seen one flown with the New K&B .48 which I think Larry is trying to market but K&B is being a-holes about engines. It flew OK not very fast. I am using a BVM fan with a KBV .82 for power this should be good power for this plane. I am using B&D retracts which are an old design.
Your profile says you are a JR member which I take to mean that you are a teenager which meen $ are tight. This may not be the part of the hobby that you try to do on a shoe string, a lot of things go wrong in a jet that need the extra effort and money that doesn't leave much room for error.
I would discuss the engine issue with Larry when you talk to him. It depends on which K&B you have as to how well it will work. If you have the box the engine came in get the model number from it. Some of the K&B's were really bad and took a lot of skill to get to run well.

Sparky

Sparky,

Its been a while since I was a teen. The Junior in the profile refers to your # of posts I believe. It lists you as a junior also. The engine I have is a 9101 rear intake and rear exhaust. I also have a Picco .80 in a Dynamax fan or a Rossi .81 witha Byron fan that I could use. I just figured the turbax and 7.5 would be fine since that is what it was designed around. I have the foam wing. It is already sheeted except for the center section on top and bottom. Does the bottom center on your wing stick down lower than the wing panels. My wing does. The pictures in the manual seem to show a flat bottom wing. Without the plans, I am not sure if mine is correct. I am using Spring Air gear. There is one servo pocket cut out in each wing panel for elevons. I am trying to find some time to start working on this thing to get it flying. I have a Byron Mig 15 and a Century Jet BAe Hawk that I am working on also. There just doesn't seem to be enough hours in the day to work on all three. I can take some more pics if that would help you out any. I believe mine has the Kfir long nose on it. I am going to build it as a Mirage 2000 I suppose. Thanks for the info.

Mark

Mark,
Just after I sent the post I realised that junior member ment something else. I guess I need to read the rules on this site, (not likely).
I am using elevons on mine As far as the bottom of the plane I know that Larry felt that he didn't get it quite right but I am not that far along to discuss the contours. I think Larry is using spring airs that are modified to air up and down. His latest one is being set up for a turbine. If you ever see his planes up close they are abosolute works of art he really puts a plane together well.
I don't know how well your other fans will match up to the existing duct but if the Dynamax fits and the Picco .80 works well i think that would be my direction.
Others will have to tell you how the picco runs if you haven't run yours.
If you get a chance to talk to Larry it may take a while for him to warm up to you, I guess a lifetime of talking to 9 out of 10 modelers who are tire kickers and not serious about models have made him a little warry. I wouldn't discuss the merrits of BVM VS JHH either. I think one being in Fla and the other on the left coast is almost too close for their likeing.

Sparky

I was told by Larry that the K&B 7.5 ( 9101) will fly this plane ok but the new 48 which you can't get or the OS46VX will make a bunch of difference in the speed of this plane! It looks like your friend did a good job building. The wing does drop below the fuse at the center. On the plans ( and in the book) it says to build up the fuse and fare it into the wing. I had asked about putting a 60 to 80 size motor in this plane but was told it will fly just fine with a 7.5 and the wing loading would be much higher with the larger motor! I am flying the JHH F86 now. I had a K&B 7.5 in it at first and would guess that it would fly at about 120 mph or so. I put a new OS46VX in it and now it flies at 140 to 150 ( I think) and it will now do very large loops without loosing a lot of air speed ( like with the K&B 7.5). Larry told me that his F86 has been clocked at 160 on radar with the K&B 48.


Have Fun!

Anyone have a spare set of plans/drawings for this jet? JHH is closed for another week and I need plans to start building. Mainly just the fuse drawing, but I could use the whold set

Milivings,
you should see these plane(s) fly with a OS.91 and a Dynamax fan-awesome verticle performance-and top speed-these planes with a full set of gear doors can go 180mph+ with this engine and fan setup.


Jackjet

I've had a JHH Kfir C2 now for about 6 years and 260 flights. Has the foam wing (42") with elevons at 11.5 pounds dry. Has flown variously with a OS.77/Dynamax, OS.65/Dynamax and currently on a OS.91/Ramtec (by far the best setup I've had in it).

Based on my experience, you will likely be disappointed using the 7.5/Turbax combination, particularly if you are looking for the performance current jets have. Use as much as you can get in the plane. The plane is draggy with the nose up and you have to fly through the corners as it can burn speed off in a heartbeat. But it will float nicely dead stick if you keep the speed up.

My plane was radar gunned at 145 mph in a dive with the OS.65/Dynamax. It was faster with the OS.91/Dynamax, and when working right, is even faster with the OS.91/Ramtec/BVM pipe. As Jack Jet said, it can be fast with the right power package. Of course, it's not a BVM Viper/Bandit either.

You have to set it up on the gear so the nose is at a positive angle, otherwise, it takes a huge amount of elevator to rotate (I know). When I put the Ramtec in the airplane, I covered the cheater hole in the wing - you don't need it. I also got saddle tanks in the fuselage next to the exhaust duct and a header tank ahead of the fan - 6 minutes with a one minute go around reserve. Springaire retracts with 3/16" struts.

Good luck!

Hi I just picked up a jhh mirage like yours from a friend and I don't have any plans or instructions. Did you ever find a set of plans? I would like to make the canards. Thanks

I have a Christen Diffusion Mirage 1/8 scale ( almost same size). I will fly you plane with a turbine P60-Jet Munt 80 for better performance or a 120 EDF fan...
For control : I use two ailerons and two elevators . Ailerons are coupled with elevator for UP/DOWN only ailerons for rolling .. I don't think you need canards activated!

Ok so I will go turbine... I didn't think that the canards were operational but I just want them for looks because they really make the jet look awesome. Thanks for the info jcterrattaz!

Call JetHangar Hobbies. They will ne happy to help you get your jet airborne.