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Old 09-16-2012, 03:24 PM   #1 (permalink)
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Default "This ain't your daddy's gasser..."

We have been working on optimizing the TRM VX270TT and the Quickdraw / Don Shank pipe combination on the Whiplash Gasser being flown by Mitch Pricer.

Mitch flew it a few times at IRCHA so we decided to build him a TRM / Quickdraw powered Whiplash Gasser that he can represent MA/Heliwholesaler and TRM with.

This video will give you a pretty good look at what it is capable of. We still have some governor and carb tuning to do but over all the machine is pretty strong and performs well on par with similar Nitro powered machines.

Mitch's Gasser is set up as follows:
VBar running the VBar gov
Futaba 255 cyclics
Futaba 265 tail
Futaba 451 throttle
690 FBL Regular Cord Blades
12 deg pitch
1950 HS at 13,500 Engine RPM
Quickdraw pipe fabricated by Don Shank
TRM VX270TT - with Alan's custom header length
Pennzoil Fully Synthetic at 32:1 with regular (9 gallons through this engine)

We did extensive sound testing on it and it passed all club noise limitiations. It measured 92-96 db at 10' at 2050 HS.

I hope you enjoy.... It's just a glimpse of what is coming....

[ame]http://www.youtube.com/watch?v=u97JqZQelgY&feature=plcp[/ame]
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Old 09-16-2012, 03:34 PM   #2 (permalink)
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This is probably the strongest gasser I ever seen. Congrats Doug.
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Old 09-16-2012, 03:39 PM   #3 (permalink)
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Thanks... We are certainly headed in the right direction with it....
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Old 09-16-2012, 05:22 PM   #4 (permalink)
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Looks good Doug. Looks like there is another choice out there to give you the same power as a nitro in the form of a Gasser. Always good to have choices.

I would like to see the flights with the canopy installed to see how it model handles the effects a canopy has on a models flight performance.

Nice flight as always Mitch!
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Old 09-16-2012, 05:44 PM   #5 (permalink)
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Thanks James... I can even show you the video where the canopy was surgically removed...

Mitch kept telling me those big a$$ magnetic mounts that I made and flew for 90 flights would not hold up to his "style"... Well I guess he was right... So we flew the rest of the day "naked"...

[ame]http://www.youtube.com/watch?v=D4Brvhii6uU&feature=context-cha[/ame]
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Old 09-16-2012, 05:56 PM   #6 (permalink)
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Wow! That's good to know.
I have magnet mount on my TBug too, and even though I'm nowhere near as good a pilot, after watching that video, I'm going to change it to hard screw in type.

You think a Booya mount will be good enough?
http://www.experiencerc.com/store/bo...00-p-4742.html
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Old 09-16-2012, 06:44 PM   #7 (permalink)
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Default Amazing Flight

Wow Doug!
You said you were going to get a pilot and you wern't kidding that guy can fly. Looks like a lot of fun. Thanks for sharing the video.
Don
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Old 09-16-2012, 07:00 PM   #8 (permalink)
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Fast runner!!!
Yes Booya mounts are fine but for Mitch's flying with this kind of power we are going to go back to the Thumb Screws. I might even locktite them every flight. (lol)

Don.. Mitch is not only a world class pilot, but he's a World Class young man. I hope we can all meet some time.

Thanks.
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Old 09-16-2012, 07:52 PM   #9 (permalink)
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Those canopies become big ole parachutes when you are doing any type of movement backwards. So not only will the weight of the canopy affect the performance, but that will as well. I look forward to seeing a full flight with the canopy on.
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Old 09-16-2012, 10:15 PM   #10 (permalink)
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Thumbs up Doug!

Who is your Daddy, and what does he do??

-=>Raja.
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Old 09-16-2012, 10:47 PM   #11 (permalink)
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You make me laugh!!!
Great come back!!!
Hope your well Raja!!!
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Old 09-16-2012, 11:41 PM   #12 (permalink)
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Quote:
Originally Posted by James Kovach View Post
Those canopies become big ole parachutes when you are doing any type of movement backwards. So not only will the weight of the canopy affect the performance, but that will as well. I look forward to seeing a full flight with the canopy on.
I haven't thought about it that way. You're right though.
I put 700-size canopies on my 600. Not only it's heavier, it's also a bigger parachute.
At least, if I crashed tail first, it helps.

I guess, we can drill holes in the canopy. Not only help in cooling, but also lessen the wind force...won't help in the look department though.

Anyway, enough force to blow the canopy like that is pretty awesome.
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Old 09-24-2012, 03:56 PM   #13 (permalink)
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Here you go James... "Full flight with the canopy on".....

And the even flying in "Under the Lights..."

[ame]http://www.youtube.com/watch?v=ap03hQ25vHI[/ame]
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Old 09-24-2012, 08:06 PM   #14 (permalink)
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Doing much better Doug, good job
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Old 09-24-2012, 08:10 PM   #15 (permalink)
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man that thing flies well.. but every time it flew at SRC you could see people plugging their ears it is really shrill and very loud..
thing is a beast though.
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Old 09-24-2012, 10:51 PM   #16 (permalink)
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We have had it tested for noise levels at two different fields with at least three different meters and it indeed is louder and the tone is different. I am running a 3" silencer to reduce it to levels that are allowable at all the fields I fly at.
This heli with an RJX muffler tested at 86 - 91db for a pirouette at 10' of distance in ST2. The next day we tested the with this QuickDraw pipe at the exact same distance and the readings were 92-96db. I'm not sure I ever saw masses of people plugging their ears, but I do know that everytime it flew we had lots of people watching...
As the day got really hot (95 deg) the engine performance fell off some and with so many guys trying it, I didn't do a very good job of keeping it in tune. But as you can see it still flys darn strong. For those interested here are a couple more youTube links one with the Team MA Pro's Mitch Pricer (Gasser) and Tyler Benson (Electric) flying a noon pro demo in tandem. There are several places where they are doing dueling Tic Toc's and for being short about 6 Hp the Gasser looks pretty respectable...

[ame]http://www.youtube.com/watch?v=bXp7lJ9okag&feature=BFa&list=FLrdf36dyQIdG tSy6GfMsdsA[/ame]


[ame]http://www.youtube.com/watch?v=fi5H2zWfUYE&feature=BFa&list=FLrdf36dyQIdG tSy6GfMsdsA[/ame]
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Old 09-25-2012, 01:07 AM   #17 (permalink)
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Wonderful bird Doug.
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Old 09-25-2012, 01:38 AM   #18 (permalink)
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Doug

I looked at the pics again of your setup. You could put one of the 6 inch silencers on there like Scott has on his. It will get quieter. The DB range you are testing at. 10 feet is close. The boats we check at 50 feet. The reading you are getting would be about right being closer though. For us it is 90 db at 50 feet is the rule. Glad you enjoying the setup.

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Old 09-25-2012, 08:22 AM   #19 (permalink)
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Good looking flight Doug. But to be honest, it still looks like there is some weight there. Would be interested to see a pic of the heli on a scale. Looks like mine did when I had it at 12.5 lbs.

It also does not look like you are getting any more power with that Pipe vs a more "standard" gasser pipe.. It is doing well, but I can see and hear the RPM falling off when he loads it up.

Lastly, the sound. Not a big fan of the sound it is putting out. Others have told me the same that were at SRC. Keep in mind that a 2-3db increase will generally be perceived as twice as loud. So you take something that is around 90db that people already consider to be loud and then increase it 2-6 more db, then people are going to consider it 2-4 times louder and really not like it.

Either way, it is one damn good flying Gasser. It is by far the best Whiplash flying I have seen yet
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Old 09-25-2012, 08:47 AM   #20 (permalink)
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Thanks James for the kind words... As for the weight it's 13 without fuel and 14 with fuel roughly. It is interesting to see how different pilots "feel" the weight. Some who "plan" their stops can feel the weight, others who just put as much stick into it as needed to stop and change direction don't notice the weight.

The only thing you are wrong about is the power with and without the pipe. The pipe has made the machine very comparable to a Nitro and all that have flown it will verify that. We flew the heli on back to back days with RJX and then Quickdraw and it was blatantly obvious in flight that it was 30-40% higher in power. It is flying now with +-12 deg pitch and previously it was at 10.5 with similar engine characteristics. But we can just agree to disagree. I hope we can fly together yet this year as you are more than welcome to give it a try. With you being a much better and more experienced pilot than I am you will get a good feel for it quickly.

As for the sound, quite frankly I love it... I still may end up with some additional silencing if I can make a custom one that works better.
I did see a few other Gassers at SRC including talking to a folks that were running things you had helped them with. They were very complimentary. Keep up the good work. I just didn't see any of them flying in a way to demonstrate their power and capabilities.
I hope we can get together at Heli Freak or Orlando and have some fun...
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