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BHM Mosquito in MS-build

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Mad BHM Mosquito in MS-build

Post  944_Jim on Sun Feb 19, 2017 11:38 am

Good morning;

After watching Bob's Mossie build for more than a week, I have been dying to jump




into a 10 month old started-but-stalled kit.
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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Sun Feb 19, 2017 12:27 pm

Way to go Jim, I'm looking forward to reading all about it. Learn from my mistakes, which were many.

Bob
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Mon Feb 20, 2017 12:01 pm

Still have full system, control system to install.

There is almost 1/2" between the engines and the leading edge of the wing. I think CG is a little far forward, so I may slide the nacelles back 1/4".
1/2oz fuel tanks on top of the wing, potentially with muffler pressure.


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Mad Re: BHM Mosquito in MS-build

Post  akjgardner on Mon Feb 20, 2017 5:30 pm

Hey, Thats looking good , Is that 2 norvel .074's on that thing ? If it is that badboy's gunna ge going supersonic.Have fun
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Mon Feb 20, 2017 10:51 pm

Yes,
Two Norvel Big Migs @ .074.

This kit really dwarfs my 18" Typhoon!

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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Tue Feb 21, 2017 6:26 am

Looking good Jim. Yes, lot's of wing area on the Mosquito. Early progress made, time takers are yet to come.

I do like the way you took the hard edges off the canopy and forward fuselage. Both of my nacelles were broken in half when received, looks like yours were intact. I like the aggressive way that you re-enforced them, did they come in the kit? Mine were rather dinky.

Got a paint scheme in mind?

Bob
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Tue Feb 21, 2017 9:22 am

Hi Bob,

Both nacelles were fine when I got them.

The kit supplied plywood IS kind of small. I purchased a large sheet so I could reinforce the nacelles on both sides.
Note the port side inboard joint between the nacelle and the wing. Roughly from middle of wing chord to 3/4 way back the the trailing edge...You can barely make out a slot for plywood to tie the top/bottom of the nacelle through the wing. This slot is in both wings/nacelles.

I noted the landing gear upper mount is supposed to be through the upper engine bearers. My engine bearers are 1/2" shorter than the plans shows. I wonder if the stress of engine and L/G mount are what has caused nacelle failure in flight. That top L/G may start tearing the plywood/balsa, so I may have to watch that closely...It screams for a sliding spring-loaded mount!

Tanks will be tray-mounted. The trays will be changeable between tanks, and provide a right angle bulkhead to help keep the nacelles at right angles to the wings while glue dries. I'm toying with:
A) bottom-mounting the tanks, and using muffler pressure to feed the venturies.
B) Top-mounting the tanks, and gravity-feeding the venturies.

One of my wife's nylons is being pressed into service as patch material for all fuse, rudder, nacelle joints. Each strip will be about 1" wide, and the length of the joint.

I put 7" two-blade props on it to check for clearance. The fuselage is not hard-mounyed yet. It will be slid off-center in order to center it between the props, not the nacelles. I'm hoping the  props will slow the engines down a bit for maiden flight. However, I have a stack of props from 3-blade to 2-blade in wood, nylon, plastic from 7x4 down to 5x3. Somewhere between will be the happy combination!
This model screams for big spinners. Dubro 1-1/2" should look good on it.
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Tue Feb 21, 2017 9:35 am

Paint will be darker camouflage based on what colors I have mixed on hand.
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Mad I found CPT Blackhawk!

Post  944_Jim on Mon May 01, 2017 11:19 pm

We have a thumb's-up!


Last edited by 944_Jim on Mon May 01, 2017 11:31 pm; edited 1 time in total
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Mon May 01, 2017 11:28 pm

One of the guys at work challenged me to fit a pilot. I found a job of a WWII poster and copied the pilot with his arm held thumb's-up. A little picture tweaking got a mirror I.age for the right side view. It's almost creepy the way the eyes follow, like Mona Lisa! His head and hand are glued to heavy cardstock and glued into a slot in the cockpit.

Fule tanks and controls remain to be installed. I believe I'm going inboard/topside with the tanks in order to keep the pickup tubes away from the cylinder heads. Otherwise I'd need to move the tanks rearward. This also provides the shortest distance from the pickup tube ends to the NVAs. Going bottom side outs the port tank right in the way of the forward lead-out.




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Mad Potential fuel tank placement

Post  944_Jim on Mon May 01, 2017 11:38 pm

Topside, inboard:



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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Wed May 03, 2017 6:04 pm

Fantastic job Jim, I especially like the more scale like sky-blue underbelly and the clear cockpit with pilot. Awaiting a flight report.

Bob
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Mad Fuel system install: Take 2

Post  944_Jim on Fri Apr 20, 2018 8:31 pm


Hi All,

It's been 14 months since I finished this one...except for fuel.
I did top mount a pair of tanks. The engines kept flooding out. The plane never had both engines running at once.

So after much procrastination, I present my second fuel system:


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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Fri Apr 20, 2018 9:28 pm

Each tank is 1.5" wide, 1" long, 3/8" tall.
If my syringe is 5 cc, then I think a tank holds 8 cc.

Bench run was 1.25 minutes. I may have to make a slightly deeper tank.




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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Sat Apr 21, 2018 6:47 am

Carly Simon says procrastination is making me wait....I paraphrase... Long time Jim. But, mine has yet to see air time either so no stand-off criticism here.

One minute twenty five bench time is more than enough time to make me dizzy air time, but you should get more seconds when it's airborne.

I like your plumbing. Pressure off the mufflers works great but maybe not a possibility with my Enyas. roddie uses tubing clamps over the ends, looks nice and adds a finishing touch.

Spring time means air time.

https://www.youtube.com/watch?v=hIYTAyagxMg

Bob


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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Sat Apr 21, 2018 8:33 am

Hi Bob,

I figured you may jump in. Tank your guy and let's get them in the air! If we video the flights, then there will be three BHM Mosquitoes on YouTube. Mike Londke's Mossie is getting lonely!

I enjoyed your link. Seeing one in detail makes me want to jump back in to the Brown/Novotnik model. I had the kit cut a while back. The dimensions were translated a little off, so the kit appears to be roughly 90% of original. I have a pair of .020 Tee Dees for it IF the BHM flies well. Tanking the little one will be a little different. Watch for a different thread.

For Bob...I recognize your ZS 1.5 carbs in one of your other threads. Are you on British Car Forum?
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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Sat Apr 21, 2018 10:46 am

Yes,  MG Midget, MGB, MGTC.

https://www.mgexp.com/phorum/list.php?3

I love the - Doesn't anyone write in complete sentences and use correct grammar anymore?? thread.

Good for a laugh or two.

Bob
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Mad Re: BHM Mosquito in MS-build

Post  RknRusty on Sat Apr 21, 2018 12:05 pm

rsv1cox wrote:...I love the - Doesn't anyone write in complete sentences and use correct grammar anymore?? thread.

Good for a laugh or two.

Bob
Not since my fingers locked in a permanent curl hit every key and mouse button including the ones I want. It's why I don't write many stories or replies anymore.

But I love the Skeeter. If I ever get to do another fun-build I want to do a twin. I've never done one before, and yours looks like it would fly anywhere I point it. Great work.
Rusty

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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Sat Apr 21, 2018 12:47 pm

RknRusty wrote:
rsv1cox wrote:...I love the - Doesn't anyone write in complete sentences and use correct grammar anymore?? thread.

Good for a laugh or two.

Bob
Not since my fingers locked in a permanent curl hit every key and mouse button including the ones I want. It's why I don't write many stories or replies anymore.

But I love the Skeeter. If I ever get to do another fun-build I want to do a twin. I've never done one before, and yours looks like it would fly anywhere I point it. Great work.
Rusty

I neither write in complete sentences or use correct grammar Rusty. I justify my neglect as using "an economy of words".

I share your affliction, only mine is the other extreme, my shaky fingers fly all over the keyboard. I spend a lot of time backtracking correcting mistakes. Sad

I would trust my Mosquito build more to your locked but loaded hands than my flighty ones.

Bob
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Tue Apr 24, 2018 10:42 am

Good morning All,

Two steps forward, one step back...and then one more half-step back. Both tanks were checked for available fuel volume at the fuel pickup. They both hold 10 ml, with port side holding a smidge more. The second tank was mounted yesterday.

I finally got to hear two engines running simultaneously. Wow, hearing those two .074s synching/unsynching got me pretty excited!

Trying to start two engines back-to-back will take some learning. It really eats into the short fuel supply, so I may have to make deeper tanks.

Starboard side kept cutting out 20 seconds earlier than port. Fuel checks showed starboard was drained of fuel, as was port. Hmmm!
I found a pinhole leak while carefully watching the starboard tank during fueling. A corner seam had popped while running. Odd since I had checked both tanks under pressure, under water.

Once the tank was fixed, it was remounted.
And then I did the Stupid Ground Crew thing again; plugged the glowplug clip into my starter port.
Pfft! Said the harder-to-get glow plug.
New ones are on order, so the Mossie got pushed back into the hanger.

Mike Londke's Mossie video shows he has a couple of minutes of flying time. His has Norvel .061s. I don't know what size tanks he runs.

Mike, if you read this: What size tanks did you install?
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Mad Re: BHM Mosquito in MS-build

Post  londke3 on Tue Apr 24, 2018 2:46 pm

1oz tanks on mine.
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Mon Jun 11, 2018 8:54 pm

Bob (rsv1cox), Mike Londke, Guys,

Tonight was a successful maiden. Man, this thing flat moves! I flew it on .015"x50' 7-strand. There was a little swag, but not nearly what I've seen on dacron.
I took an old Cisco Flip video camera with a tripod.

After two un-planned for single engine run-ups, a final fuel, start, flight mission time I got just over two minutes.
The camera stopped right about, yeah! I know I flew it, even if you can't tell by the picture:
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Mad Re: BHM Mosquito in MS-build

Post  Ken Cook on Mon Jun 11, 2018 9:19 pm

Good show Jim. I just noticed Mike took a 1st in Intermediate profile at Brodak's today.
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Mad Re: BHM Mosquito in MS-build

Post  rsv1cox on Tue Jun 12, 2018 6:01 am

Way to go go Jim.

Love the picture, looks like the little guy in the cockpit was scared to death. Smile That twin sync sound is wonderful.

Yes, I have done the phifft 12V vice 1 1/2V thing too. Darn banana clips fit everything.

Bob
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Mad Re: BHM Mosquito in MS-build

Post  944_Jim on Tue Jun 12, 2018 6:45 am

The worst part is the camera missed the post-flight victory jig.
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