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Old 02-20-2005 | 01:57 AM
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digitech
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Default RE: Skymaster BAe Hawk Fuel system


ORIGINAL: Ali

K Marks

On my Hawk my settings for take off flap were 15mm down Maximum with no elevator mix. For landing I use maximum of 30mm flap travel and 15mm of up elevator. This is how mine was set and it was perfect. It came in on approach hands off. But! Do not assume this will be perfect for all. I am sure there will be a few millimeters of setting to do on both flap and elevator. The most important thing to remember is that you CAN NOT and I cant specify this enough. You can not deploy the flaps whilst this model is traveling at speed.
If you apply full flap on this model at any kind of speed the model will pitch down and the flap will override the elevator no matter how much mixing you have. My advice to everyone is to take some time during the first flights and following flights to get used to the flaps and how they interact with pitch. I suggest getting some height, slowing the model down into wind and as the speed decays gradually applying more and more flap. This way you can monitor any pitch change and get used to the feel of the model.
When deployed correctly the flaps can be left down and the model flown perfectly happily. My only concern is with either too much speed or too much flap without the correct up elevator mix.

Another point to remember is that you want to set your mix from flap[ to elevator so that the elevator is a progressive as the flaps. I fly a hawk recently where the customer had set the flap and stab mix so that he only got his 15mm of up elevator when full flap was deployed. Not Good. He had a model that wanted to pitch down until he hit full flap and then it would shoot back up again.
With the correct flap set up the model will sit perfectly for landing. You can see some of the videos of my hawk from long and short fields at my web site www.alshobbies.com (Video section)
As for power. Its a tough one. I like the way mine flew with the P-120 because I never had to use full throttle which males a pleasant change. But I knew I had the power there if I wanted it. My Next hawk will have a Mercury installed. I know this will have the right sort of power for nearly everything I want to do with the model. I too have a Pegasus sitting here doing nothing but I am sure this is just too powerful and too heavy.
Sorry I cant help with he 10X I was a Futaba man but have only recently switched to JR but all I know is the MX22


I am sure the P-70 would fly the model but it would not set the world alight, but if you want to fly the model in a scale fashion it would probably be perfect. i am sure with the fuel consumption of the P-70 you could get away with only one of the skymaster tanks and the overall weight would be lighter.

Brian
Sorry no news on the MB339 release date yet. The model had flown and all is good and if we wanted too we could go into production in a matter of weeks. But!!! As of last month the plug was being totally re engineered to make it more scale in out line and detail. This model is being produced for Al's Hobbies and when I commissioned the project the goal was to have as close to scale MB339 as we can get, and the one I flew in China although perfect in flight performance was far from what I wanted in scale outline.

Mini Flyer.
I would be very interested to see pictures of your landing light and instrument panel. I always wanted a landing light I think it might look good on my new hawk. Thankyou for your opinions on the nose section.
hello ali

i am also building a Skymaster hawk for a customer
nice model , very nice details
but as always here are a few minor details i didnt like:
and it is no bashing just some minor things i found
since the quality is great in overall

fingerprints of glue on the fuselage
also on the canopy , scratches
the wood parts to mount the servo,s are to say the least of a very poor quality
maybe they schould be left out and use MULTIPLEX 9mm instead
i mean in the manual they say to use them also for the elevator
but to mount a 8511 on 2 wooden block that i could just break right thru the middle with my fingers was not my first choice
especialy for the elevator
after inspection i found out that the wood is to soft
also it has been cut in the wrong direction so that the multiple layers are stacked on to each other
it schould be in the oposite way so that the layers are vertical when mounting
and yes i checked if i would them mount in the other direction they are to short.
landing gear:
one of the brakes air input has broken off it came like this in the package
maybe they schould have a quality control or something when shipping


Thrustpipe and engine mounting: it was much to long for the jetcat 120 i had to cut off 2 cm of the intake
and another 3cm of the thrust pipe
also i did not like the fact that the bellmouth is that small
i replaced it with a longer type so that the exhaust is covered by this
much safer in operation , and i am sure this part is just as easy to make
also the manual states to put the jetcat in ,use the special wooden lift blocks
they are not in the package , i found out that if you raise it with 18MM it is in line
maybe it is better to have that changed from the factory?
since most turbines mounts are centered

shortage:
there where simply not enough alu parts to mount the servo,s

rudder servo :
the graupner 3328 digital bearely fits
and i had to grind the cover to have it closed
you have any tips on using another?
since the 3328 is extra build to fit in small places but is slightly to thick

rudder horns mounting:
when cutting the ailerons , rudder
there is just a empty room in there no balsa
so it is extremely difficult to have them glued correctly i uses plenty of glue to fill it and then mount them
however on the flaps there was enough balsa to glue them.
they forgotten something?


for the rest:

great model
very nice build by the factory
all fits and is in the right place
and can be build in just 7 days
for the price it beats anyone by far

ps : ali could you send me the settings for the MX-22?
the CG do you have it exactly as the manual?
or did you set it on 180MM but nose slightly down?


Best regards
and keep up the good work