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Boomerang Sprint Build Thread!

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Old 05-14-2009, 07:16 AM
  #676
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Default RE: Boomerang Sprint Build Thread!

My one went together perfectly and very smoothly, even on the first time. Everything aligned perfectly.

Hey Doc where have you been. Have you flown yours yet?

Paul
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Old 05-14-2009, 07:44 AM
  #677
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Default RE: Boomerang Sprint Build Thread!

Hi Paul,

Good to hear from you. We went to maiden the ship 2 weeks ago but had 15-22 mph crosswinds. Another problem we had is the heat from the Turbine was over heating the elev control rod. I had orriginally added a 3/8" ship to the engine mount but we took it out. With all that, we developed an air leak. Finally, we found the cyl on the nose gear was the problem. It is not fixable since it's pressed so Todd is sending me a new one. It's my fault, not his. Dirt got into the cyl some how. Hopefully, next weekend we will get this thing up. I'll let you know. How is the Sprint flying and how many flights do you have on it?
Talk to you soon,

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Old 05-14-2009, 09:05 AM
  #678
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Default RE: Boomerang Sprint Build Thread!

Hi Doc

I have about 30 flight on it right now. Its perfect and up untill now its completely trouble free. With my P-70 I never had any heat problems. I can place my hand under the tailplane while the engine is running and I dont feel a thing ( not the cleverest thing to do, I know )

Paul
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Old 05-14-2009, 10:02 AM
  #679
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Default RE: Boomerang Sprint Build Thread!

I finally decided to speak up here. I had the Boomer Intro and now have 'upgraded' to the Sprint.
The Intro flew together really quick and easy. The Sprint has a little more fiddling putting it together but, for me anyways, it is no problems.
I flew my Intro with both a P60 and P70. I am installing a Jet Central Falcon with 22lb thrust. Bolts right in there with no modifications at all.
I expect to maiden mine either this weekend or more than likely next weekend.
There is a Jet Fly in at the end of this month up at Love Air in Ft Collins, CO that I really want to attend and after some issues with my P70 in my ShockJet that almost burned thru the aft fuselage section I am without a Jet.
Looking forward to flying this rocketship.
One question for everyone... how much mix does everyone have on the Flap/Elevator? I know my Intro ballooned badly on flaps down and I want to be prepared and at least be in the ballpark on the maiden.

Thanks all
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Old 05-14-2009, 03:34 PM
  #680
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Default RE: Boomerang Sprint Build Thread!

Hi Doc we must be close I'm in white cloud we fly at the airport we have a club and as a club we fly Thursday nights and Saturday come up my email kb8ife@ncats.net
thanks jim
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Old 05-14-2009, 04:08 PM
  #681
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Default RE: Boomerang Sprint Build Thread!

Ours must have come off the same jig because I worked three days sanding the inner wing tube and aluminum rods before they would slide in. I e-mailed Patricia and she said to lightly sand the inner wing tube with emory cloth, I ended up using 80 grit before I saw any progress. My flap also did not fit with the supplied CA hinges. I tried two sets of CA type with no success either time. I finally went and bought some Robart pinned hinges and it seems to work better but I still had to sand off part of the bottom of the fuse to get it to lay right. The flap servo is a digital and when the flap is full up the servo buzzes a little, so I went and bought a serve amp tester. When I put it in to check it, the servo is pulling .08 amps at full up travel. Sometimes it will drop to zero if it sits there long enough. Hopefully that won't pull too much on my battery in flight. Hopefully all this fit work will be worth it when it's ready to fly!!!



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Old 05-14-2009, 04:47 PM
  #682
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Default RE: Boomerang Sprint Build Thread!

Mine went together OK Also. I did have the problem with the flap not going all the way up but a little sanding and it's perfect now.
My aluminum rods are a little tight coming off but nothing I can't handle
Like doc this is also my First turbine. I now have it all ready to go I have it balanced hopefully where it should be. I have ran the engine in at the field
and had some little problems, but Eric (jet Central) was right there to help me out and it ended up being my error.
I went with this plane because I know it will fly off of the Sod farm that our field is on. Now all I have to do is get my waiver and maiden.. hopefully in the
next week or two. But I am very satisfied so far with the service and the plane
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Old 05-14-2009, 06:08 PM
  #683
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Default RE: Boomerang Sprint Build Thread!

Hmmm. I thought this forum was all about sharing experiences. Must be wrong.

Jack
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Old 05-14-2009, 08:22 PM
  #684
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Default RE: Boomerang Sprint Build Thread!

Here is my build so far
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Old 05-14-2009, 08:53 PM
  #685
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Default RE: Boomerang Sprint Build Thread!

I noticed a lot of you guys are putting screws in your wheel wells to hold them in. I take it that gluing them in is not a good idea? I haven't done anything with mine yet and that might be the way to go. Do you put extra wood underneath to screw it to or just right in the balsa sheeting?

Chris
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Old 05-14-2009, 09:42 PM
  #686
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Default RE: Boomerang Sprint Build Thread!

Hello

Making the wheel wels removable is like having two more access panels for the internals of the wing. It will aid you when installing/removing the differnt wires/airlines. Yes you should use extra wood. Thin hardwood will do.

Paul
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Old 05-15-2009, 12:54 AM
  #687
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Default RE: Boomerang Sprint Build Thread!

Hi Jim,

Thanks for the invite. Yes, I'm in Grand Rapids, NE. I will email you this weekend. I should be receiving a new air cylinder for my nose gear in the next few days and once finished I should be ready for the maiden. Talk to you soon,

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Old 05-21-2009, 09:55 PM
  #688
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Default RE: Boomerang Sprint Build Thread!



Well,



I got in touch with Patricia, who got Alan to get in touch with me.



We discused the issuse  that I am having whith the Sprint and we are working on a  remedy for the problems.



Tomorrow will be the maiden and possibly I wil get my turbine waiver sign off.

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Old 05-21-2009, 10:41 PM
  #689
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Default RE: Boomerang Sprint Build Thread!

Hi,

If you glue them in, you won't have any access to the airlines. Here is what mine looks like. Once the holes were all drilled, ICA'D 1/16" plywood squares about 1/2" in size inside under each hole. I gives it good support.

Doc...
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Old 05-21-2009, 10:46 PM
  #690
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Default RE: Boomerang Sprint Build Thread!

Hi,

Sorry about that. Wrong picture. Let's try this.

Doc...
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Old 05-22-2009, 05:44 AM
  #691
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Default RE: Boomerang Sprint Build Thread!


Quote:
ORIGINAL: DamBo



Well,



I got in touch with Patricia, who got Alan to get in touch with me.



We discused the issuse that I am having whith theSprint and we are working on a remedy for the problems.



Tomorrow will be the maiden and possibly I wil get my turbine waiver sign off.

Seeya at the Nighthawks field today?

Dave
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Old 05-22-2009, 06:36 AM
  #692
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Default RE: Boomerang Sprint Build Thread!

Okay

Going over everything, again and packing.

See ya

Thanks
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Old 05-22-2009, 06:39 AM
  #693
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Default RE: Boomerang Sprint Build Thread!


Quote:
ORIGINAL: DamBo

Okay

Going over everything, again and packing.

See ya

Thanks
About 11AM

Dave
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Old 05-22-2009, 07:46 PM
  #694
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Default RE: Boomerang Sprint Build Thread!

Dave (Dambo) flew his Sprint today! Congrats!

Dave Rigotti
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Old 05-22-2009, 11:43 PM
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Default RE: Boomerang Sprint Build Thread!

Hi,

Congrats. Ship looks great! Enjoy! The weather looks to be good for Sat. am so this will be my maiden day. I'll post later.

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Old 05-23-2009, 07:53 AM
  #696
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Default RE: Boomerang Sprint Build Thread!

flys great doesnt it.. you have the same color i do. i am flying mine today.. are you using the p70?
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Old 05-23-2009, 12:35 PM
  #697
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Default RE: Boomerang Sprint Build Thread!

I have Rabbit on it.
Flies excellent, very, (stress free).
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Old 05-23-2009, 11:55 PM
  #698
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Default RE: Boomerang Sprint Build Thread!

Hi Guys,
Well, today finally came for the maiden.Fortunately, the flying went better than the pictures but some of the video is pretty cool.The Sprint really lived up to its reputation as a great and stable flyer.From the moment it broke ground until touchdown, it did anything you asked it to.Going in, we knew it was a tad nose heavy but I have always flown that way.On its first roll, no elevator was needed.The only trim needed to get to hands off were 2 clicks on the ailerons.I did not do the maiden, John Stotes, who is working with me on my Turbine Waver, flew it to perfection.On the landing, it was nothing short of a grease job.My turn came on the 2nd flight while hooked up to a buddy box.What a trip, especially in the turns and on the rolls.Thanks to John for all his great work and all the guys here in this thread who have been there for me throughout the building process.

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Old 05-24-2009, 12:07 AM
  #699
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Default RE: Boomerang Sprint Build Thread!

Hi,

Don't know where the pictures went of the maiden. I'll try again.

Doc...
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Old 05-24-2009, 06:22 AM
  #700
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Default RE: Boomerang Sprint Build Thread!

flys great doesnt it. i got 4 flights in yesturday.. as for the trimming mine is only 2 clicks down elevator for trim and all other surfaces are dead center.. planes tracks like on rails... glad you had a perfect maiden...fly the wheels off of it...pat
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