Yet another BAe Hawk, curious...
 

Im curious to find out if anyone on here has bought a Hawk from Alex at AK-Models here in the USA. He has told me that it is the AMD Hawk, but Im just wondering on the quailty of this particular verison(s). He claims stronly that a turbine can't be used but we all know a turbine puts no more stress on the airframe when flown in the right manner. Im just interested in over all quailty and first impressions, fuel tank setups, etc. For $330 + shipping its hard to beat if its worth anything..

http://ak-models.com/bae_hwak_blue.htm

RE: Yet another BAe Hawk, curious...
 

Hi Justin

Take him at his word. I've seen the AMD hawk up close and I wouldn't reccommend a 12+ lb turbine. It would probably fly well with a Simjet 700 or MW44, but no more.

Ed

RE: Yet another BAe Hawk, curious...
 

I asked him why it is not suitable and he replied: "because it says so in the instructions"

RE: Yet another BAe Hawk, curious...
 

Well....I mean think about it... He says however it can be converted with a Dynamax & .91 Combo, but no turbine. Now think of the amount of viberation,etc off the fan unit, Now think of a turbine, the airframe will come out to about the same weight maybe a tad bit heaver since there is a little extra fuel. No viberation's because of the powerplant, they make things called throttles... Im just interested in the overall quailty of the airframe, glue joints, things of this nature. Wether it says turbines are not suitible or are really makes no impact on me, that's just a disclaimer by the company.

RE: Yet another BAe Hawk, curious...
 

Ed

I have just started on my AMD Hawk which I will power with my Wren 44. I know this model has been flown with a Wren 54 but I think it will be overpowered and overweight.

I know people will say you can use less throttle but it seems a bit pointless to use a turbine that is too powerfull in the first place.

BTW the quality of the glue joints etc look OK and the model is excellent value for money compared to the Savex L39.

John

RE: Yet another BAe Hawk, curious...
 

No different than people putting P120's on Bobcats, etc, etc. I would just like some detailed pictures of the one from AK-Models, he told me many people have bought them but seems like no one on here has. I have a feeling there are more ARF's on the market like this aswell, not just the hawk, some delta's,etc just can't find them. What ever happened to the Roo's.

RE: Yet another BAe Hawk, curious...
 

Justin

Like you I don't know why Composite ARF stopped the 'Roo. It was a good solid starter model, simple to operate and vey good value as well as being quick to build. I am surprised they are not doing another sport model.

John

RE: Yet another BAe Hawk, curious...
 

I think the RCAV8TER is right about this one. I think it will be too heavy to fly as well as if it had a ducted fan or a MW44. However i Do think the statement is just a disclaimer as people are putting turbines in them and HAVE put turbines in them. I personally would wait untill SJN gets his flying and see how it does. Get A Rookie!! Get A Reaper!! :D Russ

RE: Yet another BAe Hawk, curious...
 

Get me some Money....LMAO

RE: Yet another BAe Hawk, curious...
 

Dont worry guys....ill take some vids of mine when it is ready [8D]

still....as I have seen it fly with the super sport, im convinced ;)

RE: Yet another BAe Hawk, curious...
 

Thank you for this thread, now I'm wondering about all of the D/F jet kits that were produced before the advent of gas turbine units. Most of the smaller BVM kits were originally made for D/F and with slight modifications are now turbine kits as well. Since the cost of D/F units are less than the turbine engines, why not have less expensive D/F kits and ARFs converted to turbine to offset the cost. Maybe the reason for the 'not a turbine jet' disclaimer is a 'not resposible for this product' if it is converted to turbine. Personally I have no doubt that the quality of the turbine and ARF jet kits are great, but a little expensive for a flying hobby. The bottom line for me is a little extra work to make the D/F kits stronger is well worth the effort, considering a turbine jet may also be lost to several factors, not just structural and the initial cost of the kit is a consideration. . .

RE: Yet another BAe Hawk, curious...
 

This airframe is known to flutter badly... This may be the reason for the turbine disclaimer. Not sure of the cause, but I have seen several self destruct on both turbine and DF...Just something to keep in mind ;)

RE: Yet another BAe Hawk, curious...
 

Todd, I have one.. original JHH/Amd... DF with .46VX... maiden soon (very old project).. What was the flutter? Elevator, Rudder?

Thanks,
Edgar

RE: Yet another BAe Hawk, curious...
 

Both Edgar, although elevator was real bad. Not sure of the cause or the fix, never looked real close at the setup. I just know of 3 that went in to elevator flutter and one from rudder.

Todd

RE: Yet another BAe Hawk, curious...
 

Did my maiden today. Takeoff was marginal, but gained speed shortly after. Nice smoke trail. Blew out the engine hatch, but it landed closely. Did not affected the trim. One retract did not came out, but landed it slow enough that there were no issues.

Used about 15% flaps on takeoff, but rather than help, seemed to add too much drag. 15% nitro sport fuel with 1 oz turbine oil per gallon.
No flutter (5945 in the elevator). Bough the kit from JHH when it came out. Glad I finally decided to finish and maiden it.

Will like to coax out more power from the .46VX. Not sure I lean it just right for takeoff. Don't own a tachometer anymore...

Edgar

RE: Yet another BAe Hawk, curious...
 

Edgar---you don't need a tach---Use the pinch method--Pinch the fuel line and close the needle until the pinched line won't allow the engine to lean anymore then back it off a click or two--Use a mixture control to adjust from there. The pinch method takes some practice to get perfected---If you hold the pinch too long you will lean out the engine and not get a good needle setting...A quick pinch it what it takes---BV tought me this almost 20 years ago!!!

Kevin

RE: Yet another BAe Hawk, curious...
 

I gave up on my JHH/AMD Hawk. AMD Hawk is not suitable for turbine. The hardward package is not good enough, so my builder has to rework most of the stuff. The monokote skin is weak. Try the new JHH's ARF A7. It's a completely different plane. Way better in quality, scale and pre-finished and will fly with a WREN 44. Got some stick time on JHH's prototype a few month ago. Great, easy flyer. The flat bottom ( I think it could be a cambered one) makes low speed stable. The A7 is avaible in DF and Turbine. I bought 1 each, but still waiting for delivery. I figure that I will fly the EDF version in my local club because it bans turbine. then I will fly turbine one in another field once a while if I am craving for speed and noise. :D

I am asking Larry Wolfe of JHH to see if they are working on a new Hawk. The answer is still vague. He wants to know what size that they should make their new hawk for. There are too many hawks out there in different size. What can our hawk fans recommend to JHH? I would like to have a Wren 54 size hawk, but I might go w/ JL T-45. Any thoughts?


Mike
P.S. Traveling oversea is not fun, since I get no stick time on my plane. Thanks to RCU forum for some viewing pleasure and keyboard clicking time.

RE: Yet another BAe Hawk, curious...
 

Kevin,
Thanks. Will do the pinch method..

Mike,
I did my best to make sure those setscrews in the elevator yoke were tight and loctited. I'm not sure I will be willing to put a turbine in it. I do have an Artes Bee in the shelf. I beleive the Wren guys are/were flying one with a the 8 pound version.
Anyway it's good to do something different once in a while (my 1st DF).

Now back to my Simjet 2300 powered Hotspot:D

Regards,
Edgar

RE: Yet another BAe Hawk, curious...
 

Hi, I have one of these hawks. I haven't flown it yet. I would venture to say that the body flutter is a result of the very thin fiberglass re-inforced plastic that the fuselage is made out of. Stab flutter can be a result of the way the stabs are secured in the stab actuator mechanism. I always secure full flying stabs by pinning them in the stab actuator mechanism by using 4-40 bolts drilled and tapped all the way through the mechanism as well as the stab torque rods. I also pin the stab torque rod into the stab itself. This will ensure you that there will be no slipping or spinning of the stabs when you give control input. Since I've been doing this, I have never had a crash due to stab failure.
As far as the fuselage is concerned, just lay a couple of layers of 3/4 oz. cloth in there. This should add considerable strength to the fuse while not adding a lot of weight.
Steve

RE: Yet another BAe Hawk, curious...
 

Hi Mike,
Don't give up on your amd/jhh hawk as you don't know what you are missing as it is a delight to fly. I am the U.K. importer of this kit and have been flying them for 3 years.It originally had a wren 54 supers sport in which i think Sonnich will vouch for this as he saw it fly in Denmark about 2 years ago.Well less is more and we now have one with the mw 44 in and weighs just over 10lb same as the ducted fan version and flies incredible well and will go even better with the new wren 44 which is now produces 10lb of thust.All my kits are supplied with 3mm metal clevises and 3mm studding.The most important area of this plane is the all moving tail.Make sure you file flats on the tailplane joiner rod then put 3mm allen head srews rather than the supplied grub srews and you will be able to tighten things up better.Our c.g. is 64mm from the top hatch opening giving a slightly nose heavy plane.We have done extensive test swith this plane and i feel the wren 44 combination is the best.It has been flown in extremely strong winds where you would not even dare to fly a kite but cuts through the rough air like a knife through butter. Bobcats and Fire birds were being thrown all over the place on landing bot the hawk took it all in its own stride.If those sort of conditons does not test the models strength i do not know what would.I have been in touch over the last year with AMD and have helped them develope the latest turbine version of this by sending various samples out to them.There is a complete review of this model in the next edition of RCJI so go and buy it and discover all of the up grades i have suggested.Videos of our turbine powered AMD Hawks flying
For First AMD Hawk powered by Wren Super Sport flown off grass at a
meeting in Denmark in 2004.
http://www.rcgroups.com/forums/showt...21#post5700761

For second Hawk powered by a standard MW44 flown at a meeting in the UK
in 2005
http://www.rcgroups.com/forums/showt...hlight=hawk#po