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Graupner Mosquito

Old 04-21-2005, 06:42 AM
  #1  
Greg Covey
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Default Graupner Mosquito

Hi,

I couldn't resist buying the new [link=http://www.hobby-lobby.com/mosquitomicro.htm]Graupner Mosquito[/link] from Hobby Lobby. It reminded me of a mini-sized [link=http://www.hobby-lobby.com/tipsy.htm]Graupner Tipsy[/link] but with a V-tail.

When I opened the box, it was a nice change to see a balsa model that lies somewhere between a kit and an ARF. I will post some photos soon.

My plan is to use a direct drive GWS IPS motor, GWS 3x2 prop, GWS 2-amp ESC, and a 2-cell Lithium pack. For servos, i'll use the new FMA PS-10 sub micro servos. Let's see what happens!
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Old 04-21-2005, 10:09 AM
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rahtware
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Default RE: Graupner Mosquito

Greg

Waiting on your review as I was considering this plane for a future purchase.

Old 04-21-2005, 03:05 PM
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Default RE: Graupner Mosquito

Larry,

This will be more of a personal interest project than a formal review but hopefully others will add their findings as well. Since it is not a review, I am free to choose my own support components.

Here is how the Mosquito comes in the box. Out of the box, note that there are two sheets (one underneath) of balsa with the marked numbers. While this creates some extra parts, it is an inexpensive way to duplicate other needed items.

For my support components, I'm using FMA PS-10 servos and a direct drive GWS IPS system with R-4P single conversion receiver. I'll decide on which 2-cell Lithium pact to use after I see the allowed space.
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Old 04-21-2005, 03:08 PM
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Default RE: Graupner Mosquito

The fuselage builds up fast and easy. I used medium CA with kicker.

Note that the servos are installed inverted and just tacked to the side with some CA.
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Old 04-22-2005, 06:57 AM
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Default RE: Graupner Mosquito

I secured the outer nylon tubing in two places using some CA and a small piece of balsa.

Although the servos were CA'ed in place, I added a small foam wedge between them cut from the GWS R-4P receiver packing. The foam wedge was secured to the servo sides with CA.
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Old 04-22-2005, 07:03 AM
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Default RE: Graupner Mosquito

After the tail is assembled, including control horns, it is glued onto the fuselage. I made some control horns from thin plastic and CA'ed them onto the elevons.

The control wire is cut to length and then bent 90 degrees to fit through the hole. I felt that nothing is needed to keep the wire in place on the control horn due to the natural spring tension.

It's important to make both sides symmetrical for optimal flight control.
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Old 04-22-2005, 07:06 AM
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Default RE: Graupner Mosquito

The kit comes with two size motor mounts, one for the Grauper Speed 250 motor and one for a "micro" motor (a.k.a. GWS IPS).

I'm having fun building this little plane while getting CA and balsa dust all over the place.
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Old 04-23-2005, 01:00 PM
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Default RE: Graupner Mosquito

The Mosquito cowl is cut along the outline in the plastic and then custom fit to your model.

I mounted the ESC on the wing top per the instructions. The empty plane weighed 2.9oz and with my 0.8oz 2-cell Kokam 340mAh pack, it was Ready-To-Fly at 3.7oz.

My plane was on the nose heavy side (about 1/4") but I will test fly it with this setup. It will be easy to add some small tail weight, if needed. I may try the 2-cell 250mAh pack sold at Hobby Lobby just to see how it fits and if it weighs less than 0.8oz.
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Old 04-23-2005, 01:07 PM
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Default RE: Graupner Mosquito

I set up my transmitter for "Elevon" mode and dialed in some dual rates and negative exponential to tame the stick centers.

I couldn't resist taking a picture next to the Graupner Tipsy. You can plainly see where the Mosquito's heritage is from.
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Old 04-24-2005, 12:09 AM
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rahtware
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Default RE: Graupner Mosquito

Greg

Looks great!

I am interested in seeing how it flies. At 8oz/sqft it seems a little heavy for an indoor flyer, but it should be a great "trunk rat".

Definition:
Trunk Rat – An RC plane that can live in my van and be pulled out for some lunchtime flying!

Thanks for the great review.
Old 04-24-2005, 07:46 AM
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Default RE: Graupner Mosquito

The Mosquito has about 7.6oz/sq. ft. and the Tipsy has about 8.8oz/sq. ft. I can fly the Tipsy indoors and it is much bigger than the Mosquito. It will be interesting to see it fly. I'll plan on taking a video to share.

Mosquito
[ul][*] Wingspan: 23"[*] Length: 17"[*] Wingarea: 66 sq. in.[*] Weight: 3.5oz
[/ul]
Tipsy
[ul][*] Wingspan: 35"[*] Length: 29"[*] Wingarea: 179 sq. in.[*] Weight: 11oz
[/ul]
Old 04-25-2005, 12:22 AM
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Default RE: Graupner Mosquito

Greg

I arrived at the 8oz/sqft by using your planes weight of 3.7oz RTF, not the advertised 3.5oz RTF weight. Still, if it is “easy to fly”, I agree that in the right hands it could be flown indoors. It's just that having flown indoor rubber band powered planes, I visualize a more sedate type of flying then a plane with that heavy a wing loading could have. Even my Peanut scale planes had a WL that was less then half that of either of these planes, and a PS tends to be a heavy indoor plane.

Good work, keep it up.
Old 04-25-2005, 07:16 AM
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Default RE: Graupner Mosquito

Yeah, I saw that difference. I should really use my measured weight in the calculation but I want to see what the stock Lithium pack weighs that Hobby Lobby sells. Perhaps it is a few tenths lighter because the Kokam 340 pack is rated for 20C. When you don't pull 4-6amps from it (like the 2amp GWS motor) the 340mAh pack acts more like 700-800mAh in duration. We first noticed this several years ago on the GWS-powered planes.

You can probably drop plenty of weight by using a lighter power system which drops your battery weight considerably as well. For example, if you intend to fly it indoors mostly, use a geared M20 HV motor and a tiny 2-cell Kokam 145mAh pack. The Mosquito will be closer to 3oz.
Old 04-30-2005, 02:58 PM
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Default RE: Graupner Mosquito

Greg -

Thanks for posting your usual well-detailed and comprehensive notes on the Mosquito. I built my Tipsy from your posts and I will be building the Mosqito from them as well. I really look forward to the video as well. Keep up the good work.
Old 05-02-2005, 10:51 AM
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Default RE: Graupner Mosquito

Thanks.

The weather didn't cooperate last weekend so my Mosquito still sits ready to test fly. Hopefully later this week it looks like we have a nice 5 day spread without rain or cold.
Old 05-10-2005, 08:44 PM
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Default RE: Graupner Mosquito

Greg -
We're all waiting (at least I am) to find out how the Mosquito flies! Any news?
Old 05-11-2005, 04:14 PM
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Default RE: Graupner Mosquito

Yes, but it was a short flight.

As I was trying to trim the very nose heavy Mosquito at full throttle, it got away from me and I smashed it into the ground. Not a real problem as it just broke the wing off at the seam.

I CA'd the wing back on and then re-visited my choice of battery pack. The size and weight (0.8oz) of the 2-cell Kokam 340 pack no longer seemed like the best choice. I tested my smaller (0.4oz) 2-cell Kokam 145mAh pack and not only did it fit well but the plane balanced properly and I dropped 0.4oz from the flying weight! I'm ready to test fly again (properly balanced) at 3.3oz. This time, it will be at only partial throttle.

I also just received the stock 3-cell 250mAh Lithium pack for the Mosquito. It weighs 0.7oz. I will remove a cell from my pack since I only need a 2-cell Lithium voltage on my direct drive GWS motor. It should weigh about 0.1oz more than my Kokam pack but provide longer flights.

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Old 05-14-2005, 01:41 PM
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Default RE: Graupner Mosquito

Thanks for all the information Greg.... I would like to get myself one of these Mosquito's and I can't wait to find out what your final results were.

-James
Old 05-16-2005, 12:26 PM
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Default RE: Graupner Mosquito

The wind wouldn't let up this weekend so i'll see if the weekday weather is any calmer. I modified the stock 0.7oz, 3-cell, 250mAh pack to create a 0.5oz, 2-cell, 250mAh pack.
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Old 05-19-2005, 07:19 AM
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Default RE: Graupner Mosquito

My attempts to fly the Mosquito were not very successful. The plane is not a glider and doesn't want to fly slow at all. I suspect that I was in a constant state of stalling in my attempts since I couldn't keep it in the air for more than 5 seconds.

I may have to put the third cell back in my modified pack and let it go all out for a higher speed test.

I finally watched the video today on the Hobby Lobby site and it confirmed that the name "Mosquito" is not just for its small size but also for it high speed.
Old 11-02-2005, 01:54 PM
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Default RE: Graupner Mosquito

Greg, any updates since May?? I just ordered one of these myself.

Tommy
Old 11-12-2005, 08:03 AM
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Default RE: Graupner Mosquito

Tommy,

Since I saw that it was not a slowflyer for indoors, I never tried it again. I suspect that is why it was called a "Mosquito". It flies like a little buzz bomb which was not what I was looking for.

Today is our last outdoor flying with the bigger glow conversions and tomorrow is our first indoor meet so I have an abrupt transition to make this weekend.

At any rate, I'll be spending much more time on this forum until April.
Old 11-26-2006, 04:23 AM
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Default RE: Graupner Mosquito

I saw the Mosquito next to the Tipsy in one thread, and the Tipsy in next to the Terry in another, makes me want to get all three and do my own review on the brothers.
Old 11-27-2006, 08:32 AM
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Default RE: Graupner Mosquito

Hey Greg, did you and the Mosquito ever become friends?? Mine sadly is still on the to-do list.

Tommy
Old 03-17-2007, 08:53 PM
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Default RE: Graupner Mosquito

Anyone still flying one of these ? Hobby Lobby is discontinuing them at a decent price. Is it worth picking one up ?

Bob

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